PRODUCT INSTRUCTION MANUAL...Jan 01, 2020 · RTTA PRODUCT INSTRUCTION MANUAL RTTA Page 10 of 46 Author:N.Archer| Revision: 2020 1.11.7 4 ROTATING, ALIGNING AND EXTENDING THE TELESCOPIC

RTTA Revision: 2020 1.1 Author: N.Archer

PRODUCT INSTRUCTION MANUAL

Product Range: Rotary Telescopic Transfer Arm (RTTA)

Product Description

Rotary Telescopic Transfer Arm with arm 760mm extension.

RTTA PRODUCT INSTRUCTION MANUAL

RTTA Page 2 of 46 Author:N.Archer| Revision: 2020 1.11.7

TABLE OF CONTENTS

1 IMPORTANT SAFETY INFORMATION ............................................................................................... 3

2 UNPACKING & INSPECTION ............................................................................................................ 3

3 INSTALLATION ................................................................................................................................. 6

3.1 Preparation ............................................................................................................................. 6

3.2 Mounting the Arm Drive Assembly to the chamber ............................................................... 6

3.3 Installing the Telescopic Arm Assembly .................................................................................. 7

4 ROTATING, ALIGNING AND EXTENDING THE TELESCOPIC ARM ................................................... 10

4.1 Manual Operation ................................................................................................................. 10

4.2 Motorised Operation ............................................................................................................ 12

5 BAKEOUT PROCEDURE .................................................................................................................. 26

6 APPENDIX A | KEY COMPONENTS FOR MANUAL & MOTORISED RTTA VERSIONS. ..................... 30

6.1 Manual Version ..................................................................................................................... 30

6.2 Motorised Version ................................................................................................................ 31

7 KEY COMPONENT SPECIFICATIONS............................................................................................... 32

7.1 LSM64 Specifications ............................................................................................................ 32

7.1.1 LSM variants .................................................................................................................. 32

7.2 MD64LB MagiDrive ............................................................................................................... 33

7.2.1 Motorized MD64LB ....................................................................................................... 33

7.2.2 Manual MD64LB ............................................................................................................ 34

7.2.3 MD64LB Specifications .................................................................................................. 35

7.2.4 MD64LB variants ........................................................................................................... 35

7.3 MD40 MagiDrive ................................................................................................................... 36

7.3.1 Motorized MD40 ........................................................................................................... 36

7.3.2 Manual MD40 ............................................................................................................... 37

7.3.3 MD40 Specification ....................................................................................................... 37

7.3.4 MD40 variants ............................................................................................................... 38

7.4 Service Collar. ........................................................................................................................ 38

7.4.1 Service Collar variants. .................................................................................................. 39

8 WIRING DIAGRAMS. ...................................................................................................................... 40

8.1 LSM64 Limit Switch wiring diagram (WD002). ..................................................................... 40

8.2 MD64LB (& MD100) switch wiring diagram (6213-048). ...................................................... 41

8.3 Main arm switch wiring diagram (6213-049). ....................................................................... 42

8.4 Main arm to feed-through wiring diagram (6213-051). ....................................................... 43

9 MATERIAL INFORMATION ............................................................................................................. 44



1 IMPORTANT SAFETY INFORMATION

This document is intended as a user guide to operation as determined by the design.

The instrument described in this document should not be used on any system where toxic,

flammable, corrosive or otherwise hazardous gases or substances may be introduced without prior

discussion with UHV Design.

Hands and fingers should be kept well clear of any moving parts during operation or whilst at

vacuum.

This equipment should be put into service only by Competent Persons who have first studied this

manual and followed carefully the recommended procedures.

2 UNPACKING & INSPECTION

The telescopic transfer manipulator is dispatched (for shipment via couriers) in a wooden crate on a

palette. The palette contains a stiff cardboard transit case suspended inside it by shock-absorbing

foam. The shipping materials should be retained in the event that the manipulator must be returned

to the supplier. The manipulator has been shipped in two parts; the telescopic transfer arm

assembly (held between two shipping plates) and the drive assembly.

Upon receipt of this package, the following steps should be taken:

o Check the ‘Shock watch’ located on the exterior of this package.

o If the indicator is red, accept the shipment, but note that activation has taken place on the

bill of lading.

o Advise suppliers immediately if activation has taken place.

o Whether activated or not, always inspect the shipment for damage upon receipt.

o In the unlikely event that goods are delivered damaged, please contact your supplier

immediately.

1. IMPORTANT SAFETY INFORMATION!



Remove the lid from the transit case and open the inner box. Remove any small components /

manuals etc. packed beside the main assemblies, together with any additional packaging to expose

the manipulator.

Lift the RTTA parts from the inner case, being careful to avoid damage to the protruding parts, and

place on a flat work surface. The manipulator main assemblies are double bagged allowing the final

wrapping to be removed in a clean environment.

IMPORTANT INFORMATION!

The Arm Drive Assembly section of this manipulator is very heavy (more than 25kg for assemblies with z-axis). Please handle with extreme care with reference to your health and safety policies.

Packing Material Shipping Box

Arm Drive

Assembly Telescopic Arm

Assembly



Once the Telescopic transfer assembly is removed from the protective coverings it should be

removed from the shipping plates and rods as shown below.

IMPORTANT INFORMATION!

Remove the transport screw holding all of the sections of the Telescopic Arm Assembly in position.



3 INSTALLATION

3.1 Preparation

IMPORTANT IINFORMATION!

The Arm Drive Assembly section of this manipulator is very heavy.

Carefully remove the RTTA sub-assemblies, motor drivers and cables from the shipping container.

Carefully remove the plastic wrapping from the sub-assemblies.

3.2 Mounting the Arm Drive Assembly to the chamber

a. Fit the head mounting ring and retaining clip onto the head mounting tube.

b. Fit the Arm Drive Assembly onto the radial distribution chamber using a CF100 (6”) conflat gasket and then screw it down into position using 16 x appropriate studs, nuts and washers.

16 x Nuts & Washers

Mounting Ring

& Retaining Clip

16 x Studs

Copper Gasket



3.3 Installing the Telescopic Arm Assembly

a. Extend the drive arm assembly and feed it through a CF150, 8” port in the radial distribution chamber taking care not to collide with the chamber.

b. If not already fitted, attach the shaft coupling (packed in a separate bag) to the RTTA arm when inserted into the chamber as below.

c. If already fitted, loosen M3 Screw on the Shaft Coupling (shown below) and remove prior to installing the RTTA arm into the chamber. When inserted into the chamber, refit the Shaft Coupling over the Rotation Shaft (ensuring that it is flush with lower stop) and tighten the collar using the M3 Screw.

Care must be taken to avoid accidental damage

when inserting the arm through the port

Shaft coupling

M3 Screw

Rotation shaft

Lower stop



d. Lift the arm assembly up to meet the head support tube, ensuring the drive pin engages with the flexible coupling inside the head support tube and the keyway in the tube is aligned with the reference feature in the head assembly bracket. It might be necessary to manually extend the arm to fully insert the shaft coupling.

e. Rotate the head assembly mounting ring until the screws are engaged as shown and tighten the 4x M4x12 socket head screws down firmly.

Reference

feature

Flexible coupling

Head mounting ring



f. Ensure the limit switch in vacuum D-sub connector is plugged in firmly.

Fitting the motor assembly to the lift/lower linear shift mechanism (if supplied)

a. Position the motor assembly in line with the mounting holes but tilt slightly to allow the drive belt to be placed over both pulleys (marked A & B).

b. Screw the motor assembly into position (the drive belt should now be under tension).

c. Fit the belt cover.

Motor assembly

Drive belt

Belt cover

A

B



4 ROTATING, ALIGNING AND EXTENDING THE TELESCOPIC ARM

4.1 Manual Operation

Setting the stop ring to align the RTTA with the desired ports

The position stop ring must be set up to allow the Telescopic Transfer Arm to be consistently

positioned in-line with the ports of a radial distribution chamber.

You will need the following tools:

o 2.5mm Allen Key

o 3mm Allen Key

Setting the top ring for rough alignment of the RTTA

a. Release the Position Stop Lever so that the ring is free to rotate.

b. Loosen the six M4 button head screws holding the stop mounting ring in position.

c. Rotate the MD64LB thimble until the Transfer Arm is pointing directly into the most commonly used distribution chamber port. Carefully extend the arm in the port to get precise alignment.

d. Rotate the Stop Pin Mounting Ring until a Stop Pin is directly adjacent to the pair of spring loaded detent rollers.

e. Flip the Position Stop lever to engage the rollers on the stop pin.

f. Re-tighten the M4 button head screws to clamp the stop mounting ring in position.

g. Retract the transfer arm to its home position.

Position Stop Lever

Stop Pin

Stop Pin

Mounting Ring M4 Button Head

Screws x 6

Position Stop Rollers



Fine adjustment of port positions

a. Release the Position Stop Lever so that the ring is free to rotate.

b. Rotate the MD64LB thimble until the Transfer Arm is pointing directly into another distribution chamber port. Carefully extend the arm in the port to get a precise alignment.

c. Loosen the M4 socket cap screw clamping the stop pin in position.

d. Flip the Position Stop Lever to engage the rollers on this stop pin.

e. Re-tighten the screw to hold the pin firmly in position.

f. Repeat this fine adjustment procedure for all radial distribution chamber ports.

M4 Screw

Stop Pin



4.2 Motorised Operation

Control Software Installation

‘McTerminal’ software will need to be installed on a suitable laptop/PC. The software will have been

supplied as a ZIP file but can also be downloaded from the following link:

http://www.mclennan.co.uk/product/mcterminal

Initial set-up & checking communication link

Ensure all cables are plugged in correctly as per the schematic below for the a 3-axis RTTA. For the 2-

axis RTTA the same procedure applies although the Jog Box and RS232 will terminate on the Axis 2

controller.

The default configuration for the RTTA is as follows:

AXIS 1 – RTTA Arm Extension

AXIS 2 – RTTA Arm Rotation

AXIS 3 – RTTA Lift/Lower (if applicable)

http://www.mclennan.co.uk/product/mcterminal



Plug the motor and limit switch cables onto the RTTA.

AXIS 2 Motor Cable

AXIS 1 Motor Cable

AXIS 2 Limit Cable

AXIS 1 Limit Cable

AXIS 3 Limit Cable

AXIS 3

Motor Cable



We recommend plugging the cables into the SIMSTEP controllers in the following order.

Step 1 | RS232 Cables

Step 2 | Jog Box Cables (GREEN) – if applicable

RS232

Termination

plug in ‘Out’

socket on Axis 3 RS232 connection

from PC to ‘In’

Jog Box

Termination plug

in ‘B’ on Axis 3 Plug connection

from Jog Box

controller into ‘A’



Step 3 | Limit Switch Cables (RED)

Step 4 | Insert the Power and Motor Cables



Step 5 | Switch on the controllers and the front LCD displays

If all connections are OK the front LCD displays will show either one of the following status’:

If the LED displays are showing any other status symbols, check all connections are in the right place

and make sure that the RS232 and Jog Box termination plugs are inserted.



Step 6 | Launch the McTerminal software

If the message “comport unavailable” appears, click on the “Setup Comms” button in the lower left-

hand corner as shown below.

Pick from the following list until one is found that does not give an error message:

Once the comms are set up, click on the monitor button in the lower left corner of the screen.



The following screen should appear if all settings are correct.

Note: the colour of the Upper Limit, Lower Limit and Datum/Input buttons may change, depending on

whether or not the relevant switch is currently activated

Entering Control Commands to move the RTTA

Before entering any commands, ensure that the

desired Axis is selected in ‘A’.

A number of default values have been set prior to

shipping the RTTA (see appendix A). These values

should only be changed if required.

Commands can be issued in the command line

shown as ‘B’.


During set up & testing DO NOT EXTEND THE ARM (AXIS ADDRESS 1) until rotational port alignment has been completed (see following pages)

A

B



Finding the rotational ‘Home Position’ and direction of rotation (AXIS 2)

Ensure Axis Address 2 is selected.

To find ‘Home’ follow this sequence:

a. RIGHT CLICK on the ‘Home to Datum’ button highlighted below. The RTTA Arm will rotate until a limit switch is activated.

b. If when the RTTA Arm has stopped a small dot is displayed on the LCD screen on the front of the MSMC controller the ‘Home’ position has been captured and stored.

c. If when the RTTA Arm has stopped rotating there is no small dot displayed LEFT CLICK on the ‘Home to Datum’ button highlighted above. The RTTA Arm will rotate in the opposite direction until the other limit switch is activated. There should now be a small dot on the LCD screen to indicate that the ‘Home’ position has been captured and stored.

Make a note of whether LEFT or RIGHT click found home as you will need to repeat this process

every time the controller loses power or is switched off and then on.

Note: The display may also show U or L whilst the datum capture (home) dot is displayed, this is

normal.



Rotating the telescopic arm to align with a port

All commands issued to the controller are in motor steps. The controller can move either relative from

its current position or absolute from the saved HOME position (assuming the Home position has been

found and captured by following the correct procedure). Position can also be set using the Jog Box.

The stepper motor controller is set to count in 1/16 steps.

One full revolution of the RTTA Arm = 640,000 counts x 1/16 steps.

Therefore 1,778 counts =1/16th step = 1o rotation.

There are 2 key drive commands:

MR (Move Relative) to move a number of steps from the current position

Using the command ‘MR(number of counts)’ will rotate the RTTA Arm the specified number of counts

from its current position.

E.g. IF you enter ‘MR80000’ into the command line the RTTA Arm will rotate 80,000 counts in one

direction (which will move the arm by 45o). ‘MR-80000’ will rotate the RTTA Arm 80,000 steps in the

opposite direction. The RTTA Arm will stop rotating before the desired number of steps if a limit switch

is activated.

MA (Move Absolute) to move a number of steps relative to the home position

To rotate the RTTA Arm relative to the HOME position, use the command MA(number of steps). e.g.

MA10000 from the monitor window.

In this case, no matter what the current position of the RTTA Arm, the RTTA Arm will move to the

rotational position that corresponds to the specified number of steps from the home position.

For example:

To rotate to the home position: enter ‘MA0’ into the monitor window (i.e. the position equal to 0 steps

from HOME).

i.e. to rotate the RTTA Arm by 90 degrees you would issue the MR160000 command to rotate the

RTTA Arm 90 degrees from its current position. The Arm will rotate until it reaches the required

number of steps OR until it hits a limit switch and stops automatically.

MR10000



Typical Motorised RTTA port alignment & recording walkthrough

STEP 1 – Install the RTTA as per the instructions on pages 6-9 and complete the controller set-up as

described on pages 12-20.


During the initial alignment of the RTTA with the required port ensure that the RTTA Arm is retracted. Ensure that AXIS 2 is selected before continuing.

STEP 2 – Find the rotational home position as detailed on page 19. The red dot should be visible on

the controller for AXIS 2.

STEP 3 – In this example Home position has been set and a note made that to home the RTTA Arm a

right-click on the ‘Home to Datum’ button was required. Recording this saves time should you need

to Home AXIS 2 (Arm rotation) at a later date.

Example: The ‘Home’ position of the RTTA Arm

.

Port for

alignment

RTTA Home

Position (AXIS 2)



STEP 4 – Enter a small value in the command line (MR200) to check that the RTTA Arm rotates

smoothly. If the RTTA Arm rotates smoothly and you have confirmed that the RTTA Arm is retracted

continue to STEP 5.

STEP 5 – Using the jog box (optional extra – see page 25) or MR command – rotate the RTTA until the

arm is approximately aligned with the desired port. In this case the Arm needs to be rotated

approximately 90 degrees so the command MR160000 is used.

Note: depending on the set-up, the value MR-160000 may be required to rotate the arm to the desired

position.

MR200

MR10000



Check alignment by extending the telescopic arm carefully (by selecting AXIS 1), watching for potential

collision between the mechanism and the port. If it looks as though the arm mechanism may clash,

retract the arm and adjust rotation.

When the arm can be extended safely through the port, select AXIS 2 again and make a note of the

STEP position as shown below (i.e. 5370)

Watch for potential clashes between

the Arm / Arm mechanism and the

port when extending – carefully

adjust rotation if necessary

2



STEP 6 – Repeat for all required port positions.

STEP 7 – When all of the port positions have been recorded as MA values you should be able to

produce a command sheet with key notes something similar to the example below:

These commands will stay the same but remember that every time the controller is switched on the

RTTA Axes must be ‘Homed’ by following the ‘right click’ / ‘left click’ process.

Follow the same process to record the desired Arm Extension (AXIS 1) and Arm Lift/Lower (AXIS 3)

positions.



4.4. Using the JOG BOX (optional extra)

The optional Jog box provides a convenient way to manually control motor control systems by

providing the following manual control functions:

o Bi-directional single step (jog) function by momentary depression of ‘+’ or ‘-’ buttons.

o Slow speed continuous operation in desired direction by the depression and holding of the

‘+’ or ‘-’ buttons. The speed of movement can be programmed using SJ command into the

Sim-Step during commissioning.

o Fast speed, continuous operation in desired direction by depressing & holding the ‘F’ button

together with either the ‘+ or ‘- button. The fast positioning rates are can also be

programmed using SF command into the Sim-Step during commissioning.



5 BAKEOUT PROCEDURE

The entire RTTA range is designed to be fully bakeable to a maximum of 250°C on removal of motors

and gear-boxes etc. Manually operated RTTA’s are fully bakeable with no requirement to remove

any components.

To prepare a motorized RTTA for bakeout you will need the following tools:

o A set of metric Allen keys


Do not exceed 250°C bakeout!

Arm extension motor

assembly

Arm lift/lower motor

assembly

Arm rotation motor

assembly



Remove the Arm lift/lower motor assembly a. Remove the M6 screw from the belt cover – remove the belt cover.

b. Remove the two M6 screws fastening the motor mounting bracket to the top brace – tilt the motor assembly up to release the pulley from the timing belt.



Remove the Arm rotation motor assembly a. Remove the six M5 screws from the belt cover – remove the belt cover.

b. Remove the two M6 screws fastening the motor mounting bracket to the top brace. Rotate the motor assembly away from the bracketry so that it can be tilted up slightly and the timing belt can be removed over the top of the RTTA.

Belt covers x 2

M5 screws x 6

Timing belt

M6 screws x 2

Motor assembly



Remove the Arm Extension motor assembly a. Remove the four M5 screws from the motor mount. b. Remove the motor assembly.

The RTTA can now be baked to a maximum of 250oC



6 APPENDIX A | KEY COMPONENTS FOR MANUAL & MOTORISED RTTA VERSIONS.

6.1 Manual Version

The manually operated RTTA consists of the following components:

o Manual MD40 MagiDrive: to drive the ‘arm’ extension motion manually.

o Manual MD64LB hollow MagiDrive: to provide polar rotation of the ‘arm’ manually.

o Manual LSM64 linear Shift Mechanism (optional): to provide 50mm of lift/lowering of the

‘arm’ to collect / hand-off the sample manually.

o Telescopic Transfer Arm system: to provide up to 760mm of ‘arm’ extension motion.

o Single port service collar - blanked off.

Manual MD40 magnetically-

coupled rotary drive

Manual MD64LB magnetically-

coupled rotary drive

Manual LSM64

linear shift

mechanism

Service collar

Telescopic

Transfer Arm



6.2 Motorised Version

The motorised RTTA consists of the following components:

o Motorized M40 MagiDrive: to drive the ‘arm’ extension motion, these can be stepper motor

or Smart motor driven.

o Motorized MD64LB hollow MagiDrive: to provide polar rotation of the ‘arm’, these can be

stepper motor or Smart motor driven.

o Motorized LSM64 linear Shift Mechanism (optional): to provide 50mm of lift/lowering of the

‘arm’ to collect / hand-off the sample, these can be stepper motor or Smart motor driven.

o Telescopic Transfer Arm system: to provide up to 760mm of ‘arm’ extension motion.

o Single port service collar with feed-through to in-vacuum position switches.

Service collar

Motorised MD40

magnetically-coupled rotary

drive

Motorised MD64LB

magnetically-coupled rotary drive

Motorised LSM64

linear shift

mechanism

Telescopic

Transfer Arm



7 KEY COMPONENT SPECIFICATIONS

7.1 LSM64 Specifications

a. Flange style:

Travelling flange: CF64, Ø114mm od with tapped holes in a straddled configuration.

System mounting flange: CF64, Ø114mm od with tapped holes in a straddled configuration.

b. Stroke: 50mm (standard).

c. Flange face to flange face: 89.0mm compressed, 139.0mm extended.

d. Clear bore: nominal 65mm (bellows i.d.).

e. Demountable bellows assembly.

f. Maximum applied load: 245N.

g. Torque required to move 245N load against one atmosphere acting on the bellows is in the order of 0.75Nm at the lead-screw pulley if motorized, or 0.5Nm at the hand-wheel.

h. Bakeable limit switches for end of travel detection on motorized version only.

i. Drive gearing (manual)

Lead-screw (via hand-wheel): 0.1” pitch (1 rotation = 0.1” / 2.54mm travel)

j. Drive gearing (Motorized)

Lead-screw: 0.1” pitch (1 rotation = 0.1” / 2.54mm travel).

Gearbox to lead-screw: Pulley ratio 1:1

Gearbox ratio: 50:1

k. Precision stainless steel ACME lead-screw supported in ball races.

l. The guidance and support mechanism uses large plain bearings (steel backed bronze matrix with a PTFE/lead overlay) running on a precision ground stainless steel bar. A further ground rod provides an anti-rotation system.

7.1.1 LSM variants

UHV Design also offer a range of customer special variants to our standard range of motorized /

manual LSM’s, some of these are described below.

VARIANT DESCRIPTION

Non Standard stroke. The LSM fitted has a stroke specified by the customer (other than 50mm). Commonly 25, 75 or 100mm.

Rotary Encoder. The LSM is fitted with a stepper motor that includes a built-in 500 line encoder.

Linear Encoder. The LSM is fitted with a Renishaw LM10 magnetic linear encoder.

Customer specified Encoder. The LSM is fitted with a customer specified rotary / linear encoder.

Customer specified drive. The LSM is fitted with an alternative drive specified by the customer.

No motor. The LSM is supplied with no motor fitted allowing the customer to fit their own.



7.2 MD64LB MagiDrive

The MD64LB is a high torque hollow magnetically coupled rotary drive. It is directly coupled to the

telescopic transfer arm head assembly allowing it to be rotated between radial distribution chamber

ports.

7.2.1 Motorized MD64LB

The Motorized MD64LB is supplied fitted with either a stepper motor or Smart motor & combined

100:1 gearbox. The drive is fitted with limit and home micro-switches that are activated by an

adjustable setting ring.

Reduced backlash drive

thimble

Motor & gearbox

Timing belt

Switches wired to

Lemo connector

Adjustable position

setting ring



7.2.2 Manual MD64LB

The manual MD64LB fitted to this system is supplied with an enlarged and knurled thimble that can

be used to rotate the drive into the desired position.

Fitted to the top of the thimble ring are a number of adjustable position stops, these engage with a

pair of spring-loaded bearings that can be with-drawn while the drive is rotated into position then

re-engaged to hold the drive firmly in position by using a simple lever.

The adjustable position stops are screwed into captivated nuts beneath a circumferential slot,

loosening the position stop mounting screw allows it to be slid along the slot to fine adjust the stop

into the exact position of a radial distribution chamber port.

The drive also includes a locking screw that can be used to hold the thimble firmly in any rotational

position.

Adjustable position stop

Spring loaded

bearings

Spring defeat

lever Thimble ring

Position locking screw



7.2.3 MD64LB Specifications

a. Flange style:

System mounting flange: CF64, Ø114mm od with clearance holes.

Rear mounting flange: CF64, Ø114mm od rotatable with tapped holes.

b. Flange face to flange face: 155mm

c. The drive shaft is a flanged tube with 6 x M3 through holes on a 57.5 PCD. The tube has a Ø48.5mm clear bore.

d. Drive gearing (Motorized):

Gearbox to thimble: Pulley ratio2:1 (via reduced backlash pulleys)

Gearbox: Ratio 100:1

e. Drive gearing (manual): N/A

f. Load Ratings: Axial 400N

Radial 8300N

g. Magnetic Breakaway Torque: 37Nm

h. Positioning (motorized):

Bakeable limit switches for end of rotation and home detection. The limit switch actuation ring allows the drive to be rotated through +/-180° between limits with the ‘home’ position set just prior to the clockwise limit.

i. Positioning (manual):

Drive position ring with integrated adjustable stops that engage with a spring-loaded bearing arrangement to give repeatable manual positioning.

7.2.4 MD64LB variants


manual MD64LB’s, some of these are described below.

VARIANT DESCRIPTION

Rotary Encoder. The MD64LB is fitted with a stepper motor that includes a built-in 500 line encoder.

Customer specified Encoder. The MD64LB is fitted with a customer specified rotary encoder.

Customer specified drive. The MD64LB is fitted with an alternative drive specified by the customer.

No motor. The MD64LB is supplied with no motor fitted allowing the customer to fit their own.



7.3 MD40 MagiDrive

The MD40 is a high torque magnetically coupled rotary drive. It is directly coupled to the telescopic

arm assembly (via the Cardan mechanism) allowing it to be extended and retracted into a radial

distribution chamber port.

The entire MD40 drive is fitted to the rotating thimble of the MD64LB, i.e. it rotates with the larger

drive, this eliminates cross talking of the motors and therefore the need to synchronize the drives to

hold the arms extended position while it is rotated.

7.3.1 Motorized MD40

The motorized MD40 is supplied fitted with either a stepper motor or Smart motor & combined

100:1 gearbox. This drive is not fitted with limit and home switches as the position of the arm is

read at the actual arm assembly.

Gearbox & motor

Drive cam

Motor mounting

tube

Drive shaft



7.3.2 Manual MD40

The manual MD40 fitted to this system is supplied with a knurled stop screw that can be used to

hold the transfer arm in the desired position.

7.3.3 MD40 Specification

a. Flange style:

System mounting flange: CF35, Ø70mm od with clearance holes.

The drive shaft is a flanged tube with 3 x M3 through holes on a 26.0 PCD. The tube has a Ø12.0mm bore x 80mm deep.

b. Drive gearing (motorized):

Gearbox to thimble: Direct cam drive 1:1

Gearbox: Ratio 100:1

Drive gearing (manual): N/A

c. Load Ratings: Axial 142N

Radial 285N

d. Magnetic Breakaway Torque: 9.0Nm

e. Positioning (motorized): No limit switches fitted

f. Positioning (manual): N/A

Locking screw

Calibrated thimble

Drive shaft



7.3.4 MD40 variants


manual MD40’s, some of these are described below.

VARIANT DESCRIPTION

Rotary Encoder. The MD40 is fitted with a stepper motor that includes a built-in 500 line encoder.

Customer specified Encoder. The MD40 is fitted with a customer specified rotary encoder.

Customer specified drive. The MD40 is fitted with an alternative drive specified by the customer.

No motor. The MD40 is supplied with no motor fitted allowing the customer to fit their own.

7.4 Service Collar.

The service collar has two functions; it provides a feed-through into vacuum for the limit switches on

the telescopic transfer arm (in motorized versions) and it provides radial support for the tube that

mounts the transfer arm.

The service collar is fitted to all motorized RTTA’s and also RTTA’s that have a z-shift fitted.

a. Flanges:

Top: CF64, Ø114mm od with clear holes.

Bottom: CF100, Ø150mm od with clear holes.

b. Support tube: Ø72mm bearing at 56mm from bottom flange face.

c. 1 x Service Collar branch for feed-through in vacuum:

d. Six pin feed-through for telescopic transfer arm micro-switch type 229-CM6-CF16. (Mating connectors: 220-CON6-AIR [air-side] & 220-CON-6-SR [in vacuum]).

e. In vacuum D-type plug for connection to the socket fitted to the telescopic transfer arm. D-type to 220-CON6-SR wiring diagram, 6213-051 is appended to this manual.

Limit switch

feed-through

Service collar

Shaft support



7.4.1 Service Collar variants.

UHV Design also offer a range of customer special variants to our standard range of service

collars, some of these are described below.

VARIANT DESCRIPTION

Bespoke system mounting flange size.

The service collar can be fitted with a customer specified system mounting flange.

Bespoke service collar. The service collar can be manufactured to customer specifications, i.e. with additional side ports.



8 WIRING DIAGRAMS.

For motorized RTTAs only.

8.1 LSM64 Limit Switch wiring diagram (WD002).

The LSM64 is supplied pre-wired to the diagram below using PTFE coated copper wire crimped into

spade connectors that are screwed down to the micro-switch terminals. The bulk head connector

used is a LEMO type EGG.1B.306.CYM. This arrangement is fully bakeable to 250C.

NOTE:

Mating LEMO connector FHG.1B.306.CLAD42Z & cable relief is included.



8.2 MD64LB (& MD100) switch wiring diagram (6213-048).

The MD64LB is supplied pre-wired to the diagram below using PTFE coated copper wire crimped into

spade connectors that are screwed down to the micro-switch terminals. The bulk head connector

used is a LEMO type EGG.1B.306.CYM. This arrangement is fully bakeable to 250C.

NOTE:

Mating LEMO connector FGG.1B.306.CLAD42Z & cable relief is included.



8.3 Main arm switch wiring diagram (6213-049).

The extension arm is supplied pre-wired to the diagram below using Kapton wire crimped into spade

connectors that are screwed down to the micro-switch terminals. The connector used is an Allectra

211-MS-09-PK in vacuum D-type plug. This arrangement is fully bakeable to 250C.

NOTE:

The D-type connector is fixed to the extension arm head assembly and should be plugged into the

mating half on final assembly of the RTTA into the radial distribution chamber.



8.4 Main arm to feed-through wiring diagram (6213-051).

The service collar is supplied pre-wired to the diagram below using Kapton wire. The connectors

used are an Allectra 211-MS-09-PK in vacuum D-type plug & an Allectra 220-CM6-C16 feed-through.

This arrangement is fully bakeable to 250C.

NOTES:

a. The 220-CM6 feed-through contains in-vacuum pins that link to the wiring from the D-type connector via an in-vacuum plug, part number 220-CON-6-SR.

b. Mating Allectra air-side plug 220-CON6-AIR & pins are included.



9 MATERIAL INFORMATION

The following table details materials used in an RTTA that will be exposed to the vacuum

environment.

COMPONENTS MATERIAL Extension arm elements Stainless Steel 304

Extension arm rolling bearings Stainless Steel 440 races & Silicon Nitride balls

Extension Arm drive pin Aluminium Bronze

Gear elements Stainless Steel 304 / 316 Tungsten disulfide treated working surfaces

Extension drive arms Aluminium HE30

Anti-backlash spring Stainless Steel 304

Assembly hanger brackets Aluminium HE30

Shaft coupling Stainless Steel 304 / 316 & Aluminium Bronze

Shaft support bearings Stainless Steel 440

In-vacuum D-sub connector Unfilled PEEK (housing) & Stainless Steel fittings

In vacuum feed-through connector Unfilled PEEK (housing) & Stainless Steel fittings

Limit switch feed-through Stainless Steel & Glass ceramic

V3F Limit switches

PPS (housing), Ceramic (plunger), silver (contacts) & Stainless steel fittings

Drive Tubes Stainless Steel 304 / 316

Bellows components (LSM64) Stainless Steel 316

Sealing Gaskets Copper

Rotary drive bearings Stainless Steel 440 Molybdenum disulfide coated

Rotary drive magnets Cobalt / Samarium

Rotary drive magnet holders elements Aluminium HE30

Rotary drive flange & body tubes Stainless Steel 316

Fittings, rings & pins Stainless Steel 316 / 304

Wiring As specified in wiring diagrams



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LEWES ROAD

LAUGHTON

UNITED KINGDOM

BN8 6BN

TEL: +44 (0)1323 811188

www.uhvdesign.com



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PRODUCT INSTRUCTION MANUAL...Jan 01, 2020 · RTTA PRODUCT INSTRUCTION MANUAL RTTA Page 10 of 46 Author:N.Archer| Revision: 2020 1.11.7 4 ROTATING, ALIGNING AND EXTENDING THE TELESCOPIC