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Spindle Motor Encoder Replacement TB0006 - Haas … Technical Documentation Effective Date: Spindle - Motor - Encoder - Replacement Spindle - Motor - Encoder - Replacement January,

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  • Haas Technical DocumentationEffective Date:

    Spindle - Motor - Encoder - Replacement

    Spindle - Motor - Encoder - Replacement

    January, 1987 - March, 2008

    INSTALLATION

    Issue:Replacement of optical motor encoder with a magnetic motor encoder.

    Overview:Please use this document to remove or replace an optical encoder.

    Resolution:Please read this section in its entirety before attempting to remove or replace the encoder.

    Call your service representative to order the appropriate adaptor cable for your new encoder.

    1. Turn machine power on. Move the spindle head to a position that

    will allow you to easily work on the top of the spindle motor. Turn the

    machine off.

    2. Remove the necessary sheetmetal to gain access to the spindle

    encoder.

    3. Remove the encoder connector from the encoder and connect the

    adaptor cable (P/N 33-10038) to it.

    4. Remove the screws holding the encoder to the mounting bracket.

    Remove the encoder, leaving the belt on the pulley at the orient

    ring.

    NOTE: If the unit has TSC, removal of the encoder mounting bracket may be necessary.

    5. Inspect the belt and replace if necessary.

    NOTE: Handle the new encoder with care; it is susceptible to damage.

    NOTE: No pulleys will be shipped with the new encoder. Your service representative will supply required pulleys (table on next page).

    1. Replace and tighten the mounting bracket screws to install the new

    encoder to the mounting bracket. When installing pulleys, be sure to

    apply Loctite to the setscrew and encoder shaft.

    2. Apply tension to the belts. Belt tension is very critical, do not create

    excessive tension. The maximum radial load (side load) for the encoder

    shaft is 13 1/2 lbs (60 N). Exceeding this may damage the encoder.

    Some machines have an automatic belt-tensioning bracket. Allow the

    bracket springs to properly tension the belt and then tighten the screws.

    3. Remove top of encoder, exposing encoder circuit card. Connect

    adaptor cable to encoder circuit card and replace the top of the encoder.

    NOTE: Push cable into notch on cap before tightening it down. Be careful to not

    pinch the cable.

    4. Coil the excess cabling to the encoder and secure it neatly in an out-

    of-the-way place, being sure to immobilize the connectors.

    5. Replace the sheet metal previously removed.

    6. Change parameter values as described in the following section.

    7. Perform the spindle orientation procedure.

    AdaptorCable

    AdaptorCable

    Connector

    REMOVAL

    MagneticEncoder

    Bracket

    EncoderConnector

    Adaptor

    EncoderConnector

    OpticalEncoder

    Bracket

    Copyright 2015 by Haas Automation, Inc. No unauthorized reproduction. Page 1 of 2

  • Parameter ValuesThese parameter changes are required when replacing a non-magnetic encoder with a magnetic encoder.

    Run Parameter Checker, if possible, to verify the machines current parameter settings. If a parameter has a

    value of zero, do not change it.

    Parameter UsageWhen replacing a mill spindle encoder, or the encoder on a lathe with a single encoder, change parameters

    79, 182, 186, 187 and 239. If a lathe has two encoders, when replacing a lathe spindle encoder, change pa-

    rameters 79, 239, 182 and 186. When replacing a lathe motor encoder, change parameter 187. When replac-

    ing a lathe sub spindle encoder, change parameters 540, 544, 545, 570 and 571. All parameters are to be

    changed in accordance with the tables shown below.

    Encoder Pulley Machine

    20-0042 HS Series

    20-0179 EC Series, ES-5, VF (50T), VFSS, VM, VS,

    SL-20/30/40 (motor), TL-25APL (motor)

    20-0975 TL-1

    20-1295 SL-30L/40L (spindle), SL-40 (spindle),

    TL-25APL (spindle), TL-3

    20-3323 OM-1/2

    54-0107 GR Series (5K-GR)

    54-0241 EC-630

    54-3090 GT-20, SL-10, TL-2

    54-7127 GR Series (complete), GT-10, MDC-500, MM, SMM,

    TM, VF-1/2/3/4, VF (40T), VR

    Parameter 79

    SPINDLE STEPS/REV

    Existing New

    1000 1024

    2000 2048

    4000 4096

    8000 8192

    20000 20480

    Parameter 239

    SPNDL ENC STEPS/REV

    Existing New

    4000 4096

    8000 8192

    Parameter 186

    Sp DECELERATION

    Existing New

    15000 15360

    16000 16384

    20000 20480

    27200 27852

    28000 28672

    40000 40960

    46000 47104

    48000 49152

    55000 56320

    60000 61440

    75000 76800

    80000 81920

    90000 92160

    95000 97280

    100000 102400

    115000 117760

    120000 122880

    125000 128000

    150000 153600

    185000 189440

    200000 204800

    240000 245760

    250000 256000

    300000 307200

    320000 327680

    350000 358400

    450000 460800

    499999 511998

    Parameter 187

    Sp MOT HI GEAR ST/REV

    Existing New

    2000 2048

    2667 2731

    3000 3072

    3975 4070

    4000 4096

    4080 4177

    4770 4884

    4990 5109

    5000 5120

    7000 7168

    8000 8192

    Parameter 182

    Sp ACCELERATION

    Existing New

    20000 20480

    60000 61440

    200000 204800

    400000 409600

    500000 512000

    800000 819200

    1000000 1024000

    1500000 1536000

    1600000 1638400

    2000000 2048000

    4000000 4096000

    Parameter 571

    SUBSPIN ST/REV

    Existing New

    4000 4096

    8000 8192

    Parameter 570

    SUBSPIN ENC ST/REV

    Existing New

    4000 4096

    8000 8192

    Parameter 540

    Ss ACCELERATION

    Existing New

    1000000 1024000

    2000000 2048000

    Parameter 544

    Ss DECELERATION

    Existing New

    400000 409600

    1000000 1024000

    Parameter 545

    Ss HIGH GEAR STEPS/REV

    Existing New

    4000 4096

    8000 8192

    Copyright 2015 by Haas Automation, Inc. No unauthorized reproduction. Page 2 of 2