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TR and TRT - Gas-Spring Counterbalance - Replacement AD0339

Service Home How To Procedures TR and TRT - Gas-Spring Counterbalance - Replacement AD0339
Recently Updated Last updated: 04/24/2020

TR and TRT - Gas-Spring Counterbalance - Replacement


AD0339

Applies to Machines built after September, 2011

TR and TRT - Gas-Spring Counterbalance - Replacement AD0339

- Jump to Section - 1. Introduction 2. Counterbalance replacement (6 steps) Back to Top

Introduction

This procedure tells you how to replace the gas-spring counterbalance on a TR and TRT. The gas-spring counterbalance has a gas-spring [2] and (2x) rod ends [1]. 

NOTE: Haas recommends replacing the Counterbalance gas springs every 4 years and checking the gas spring for oil leaks every 2 years (Replace if an excessive amount of oil is noted between body seal and shaft.  In normal operation the shaft will see a light coat of oil).

Machine Compatibility 

Do this procedures for the following rotaries:

  • All TR and TRT rotaries with counterbalances

Counterbalance replacement

1

Go to Setting 7. Set the PARAMETER to OFF.

Go to PARAMETER 43 Bit 20. Set the CK TRAVEL LIM to 0

2

Jog the A Axis in the positive direction to +180 degrees . This puts the table upside down. This fully extends the gas-spring.

Press [EMERGENCY STOP].

Remove the cover from the side of the rotary that does not have a motor. Make sure the gas-spring [2] is fully extended. Remove the gas-spring.

Remove both of the rod ends [1] from the removed gas-spring. Install the rod ends on the new gas-spring [2].

Install the gas-spring.

3

If necessary adjust the counterbalance length to fully extend over the center of the bore hole.

For TR160: Loosen the plate bolts. Adjust the plate and use one of the outer mounting holes for the top counterbalance mount to set the correct length. If you rotate the plate you will need to indicate the scale [1] and remove the scale reader [2]. Go to Step 4.

For TR210: Loosen the plate bolts. Adjust the plate and use one of the outer mounting holes [3] for the top counterbalance mount to set the correct length.

For TR310: Tighten the top mounting bolt to automatically set the correct length.

For TRT100: Loosen and adjust the foot mounting block [4] to set the correct length.

Step 3 continued...

Torque the plate bolts.
For TR100 13 ft-lb 17 N-m
For TR210  45 ft-lb 61 N-m
ForTR310 80 ft-lb 108 N-m
Torque the gas-spring Socket Head Cap Screws (SHCS)
For TR100 13 ft-lb 17 N-m
For TR160 50 ft-lb 68 N-m
For TR210 50 ft-lb 68 N-m
For TR310 110 ft-lb 149 N-m

Go to step 6

4

Do this step only if you adjust the plate on a TR160.

Install an indicator on the table near the rotary scale ring [1]. Make sure the tip of the indicator [5] touches the side of the scale ring. Loosen the scale reader [3]. Put a 0.006" (0.1524 mm) shim [2] between the scale ring and the read head.

Release [EMERGENCY STOP]. Clear alarms

If the error is more than 0.0005" (0.0127mm) make adjustments to center the scale ring. Tap on the inner diameter of the bore hole with a mallet. Do not tap on the scale.

Jog A Axis in the negative direction from +180 degrees to -180 degrees. Jog the A Axis in the positive direction back to +180 degrees. This avoids damage to the cables in the rotary [4]. Repeat this until the error is not more than 0.0005" (0.0127mm).

5

Do this step only if you adjust the plate on a TR160.

Tighten the read head [4]. Remove the shim [3] and make sure there is a 0.006" (0.1524 nm) gap between the read head and the scale ring.

Press [EMERGENCY STOP].

Torque the plate bolts [2] to 45 ft-lbs (61 nm).

Use the indicator [5] to make sure the scale ring is still aligned. If it is not aligned loosen the plate bolts and repeat this step. If it is remove the indicator and torque the gas-spring Socket Head Cap Screws [1] (SHCS) to 50 ft-lbs (30 nm).

6

Release [EMERGENCY STOP]. Clear alarms.

Jog A Axis in the negative direction to 0 degrees. This avoids damage to the cables in the rotary.

Go to PARAMETER 43 Bit 20. Set the CK TRAVEL LIM to 1. Go to Setting 7. Set the PARAMETER to ON.

Handle jog the rotary [1] in the positive and the negative direction.

Make sure the rotation does not move past 120 degrees in each direction and that the rotary does not make "squeaking" noises. If the rotary make squeaking noises, torque the plate bolts and the gas spring SHCS again.

If the rotary moves past 120 degrees or the "squeaking" noises do not stop, speak to your Haas Factory Outlet (HFO).

Install the cover on the TR or TRT.

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