VMC - 30/40-Taper - Belt/Gearbox - TRP Clamp/Unclamp Sensor - No TSC - Adjustment

Applies to machines built from: 
January, 1989 to November, 2013

VMC - 30/40-Taper - Belt/Gearbox - TRP Clamp/Unclamp Sensor - No TSC - Adjustment -Introduction

This procedure tells you how to do these adjustments:

  1. drawbar height
  2. proximity sensor ("switch") positions for the engaged/disengaged (clamped/unclamped) drawbar.

 

Machine Compatibility

Do this procedure on a vertical mill with these components:
  • belt/gearbox drive
  • 30- or 40-taper spindle
  • adjustable tool release piston (TRP) clamp and unclamp proximity sensors

VMC - 20/30/40-Taper - Drawbar Height - Check

Step 1

Jog the X Axis and the Y Axis until the spindle is in the middle of the table.

Put a toolholder with no tool into the spindle. Put a piece of paper on the table to protect the table. Put the aluminum block on the piece of paper.
Jog the Z Axis in the negative (-) direction.
Do this until the toolholder is approximately 0.30" (8 mm) from the top of the block.

Step 2

Push .001/1.

Jog the Z Axis in the negative (-) direction one increment at a time. Jog until the toolholder lightly touches the block.
The block can move in the X and Y axes, but not in the Z Axis.
caution: Do not push the tool-release button. This causes a Z-Axis overload.

Step 3

Push .001/1.

Jog the Z Axis in the negative (-) direction 0.002” (0.05 mm).
The block is tight.
Push POSIT to show the Position display. Push MDI and then HAND JOG to change the position display to zero.
Jog the Z Axis in the positive (+) direction 0.100" (2.54 mm) above the block.
Push and hold the tool-release button. With moderate force, try to move the aluminum block. If the drawbar height is correct, the block does not move at 0.100.

If the block moves, go to Step 4. If the block does not move, go to Step 5.

Step 4

Do this step if the block moved in Step 3.

Push MDI and then HAND JOG. Push .01/10.
Jog the Z Axis in the negative (-) direction 0.01” (0.254 mm), one increment.
Push and hold the tool-release button.
Try to move the aluminum block. If the block moves, jog the Z Axis one increment at a time until the block cannot move. Record the number of increments you must move the spindle. The number of increments is the number of shims to add.

Step 5

Do this step if the block did not move in Step 3.

Push .01/10.
Jog the Z Axis in the positive (+) direction 0.01” (0.254 mm), one increment.
Push and hold the tool-release button.
Try to move the aluminum block. If the block does not move, jog the Z Axis one increment at a time until the block moves. Record the number of increments you must move the spindle. The number of increments is the number of shims to remove.

VMC - 20/30/40-Taper - Belt/Gearbox Drive - TRP - Add or Remove Shims

Step 1

Disconnect the proximity-switch and solenoid cables at the solenoid bracket.

Disconnect the pre-charge and tool-release air tubes from the solenoid. Lift the TRP assembly from the spindle and move it forward to remove it.

Step 2

Use an open-ended wrench to hold the TRP shaft. Use a closed-end wrench to turn the TRP bolt [1] clockwise to loosen.

note: The threads for the tool-release bolt go in the opposite direction.
Add or remove shim washers [2] from the tool TRP bolt. Apply medium-strength thread-locking compound (for example, blue Loctite®) to the TRP bolt.

Install the TRP bolt into the bottom of the TRP. A torque wrench is not necessary to tighten the TRP bolt. Install the TRP assembly into the machine. Torque the TRP screws. Refer to Haas Fastener Torque Specifications. Use the value for iron.

Connect the pre-charge and tool release air tube to the solenoid. Connect the proximity-switch and solenoid cables. Do the "DRAWBAR HEIGHT CHECK" steps again.

VMC - 20/30/40-Taper - Belt/Gearbox Drive - TRP - Pre-charge - Adjustment

caution: Do not do this procedure on a machine that has through-spindle coolant (TSC). This damages the TSC system.

Step 1

Find the knob on the pre-charge air regulator. Turn the knob clockwise until it stops.

Make sure Parameter 149 PRE-CHARGE DELAY is set to 300.

Make sure no tool is in the spindle.

Push the Tool Release button.
note: If the pre-charge is not correctly adjusted, you hear a loud noise when the piston hits the drawbar.

Turn the main air pressure regulator clockwise one half turn.

Push the Tool Release button.

If you hear the TRP hit the drawbar, turn the main air pressure regulator clockwise one quarter turn.

caution: Do not increase the pressure too much. Only increase the pressure until you cannot hear the TRP hit the drawbar.

VMC - 30/40-Taper - Belt/Gearbox - TRP Clamp/Unclamp Sensor - No TSC - Adjustment

Step 1

Clear the EMERGENCY STOP. Push RESET to stop each alarm.

If the machine does not have a Consolidated Air/Lubrication Module (CALM), do these steps:
  1. Push PARAM/DGNOS.
  2. Set Parameter 76 LOW AIR PRESSURE to 99999.
  3. Turn the main air regulator to decrease the air pressure to 75 psi (5.2 bar).
Move the center of the table under the spindle axis. Put a toolholder with no cutting tool into the spindle.

Step 2

Put a piece of paper on the table to prevent damage to the table.

Put the aluminum block [2] on the piece of paper.

Push .001/1.
Slowly jog the Z Axis in the negative (-) direction until the toolholder lightly touches the block.

The block can move in the X and Y axes, but not in the Z Axis.

Push POSITION.
Push ORIGIN.
caution: Do not push the tool-release button. This causes a Z-Axis overload.
Jog the Z Axis in the positive (+) direction 0.060" (1.52 mm) above the block.

Step 3

Push PARAM/DGNOS until the Diagnostics tab shows.

Push the tool-release button while you monitor the status of Draw Bar Open.

If Draw Bar Open changes to 1, no adjustment is necessary.

Step 4

If Draw Bar Open does not change to 1 when you push the tool-release button, adjust the sensor as follows:

  1. Loosen the (2) Draw Bar Open sensor screws. Keep the screws sufficiently tight to control the adjustment.
  2. Lightly tap the Draw Bar Open sensor in the direction of the TRP. Do this until Draw Bar Open changes to 1 when you push the tool-release button.
  3. Push the tool-release button (2) more times. Draw Bar Open changes from 0 to 1 with each tool release.
  4. Jog the Z Axis in the negative (-) direction to 0.050" (1.27 mm) above the block.
Push the tool-release button while you monitor the status of Draw Bar Open. If Draw Bar Open stays at 0, no adjustment is necessary. If Draw Bar Open changes to 1, do these steps:
  1. Lightly tap the Draw Bar Open sensor away from the TRP until Draw Bar Open stays 0 when you push the tool-release button.
  2. Push TOOL RELEASE (2) more times to make sure Draw Bar Open stays 0.
  3. Torque the (2) Draw Bar Open screws. Refer to Haas Fastener Torque Specifications. Use the value for iron.
  4. Jog to 0.06" (1.52 mm) away from the block.
Push TOOL RELEASE while you monitor the status of Draw Bar Open. If Draw Bar Open changes to 1, no adjustment is necessary. If Draw Bar Open stays at 0, do these steps:
  1. Loosen the (2) Draw Bar Open sensor screws. Keep the screws sufficiently tight to control the adjustment.
  2. Lightly tap the Draw Bar Open sensor in the direction of the TRP. Do this until Draw Bar Open changes to 1 when you push the tool-release button.
  3. Push TOOL RELEASE (2) more times to make sure Draw Bar Open changes from 0 to 1.
  4. Torque the (2) Draw Bar Open screws. Refer to Haas Fastener Torque Specifications. Use the value for iron.
note: When you push the tool-release button, the adjustment of the sensor is correct if:
  • At 0.06" (1.52 mm) above the block, (Draw Bar Open=1) . The sensor is on.
  • At 0.05" (1.27 mm) above the block, (Draw Bar Open=0) . The sensor is off.

Step 5

Remove the toolholder from the spindle.

Put a 0.02" (0.508 mm) feeler gauge [1] between the tool-release bolt [2] for the TRP and the drawbar [3].

Step 6

Push MDI/DNC. Push DELETE to clear any code in the display. Type M59 P1120. Push WRITE/ENTER.

Step 7

Adjust the Draw Bar Closed sensor as follows:

Remove the toolholder from the spindle. Operate this code in MDI mode:
M56 P1114;
If Draw Bar Closed does not change to 0, do these steps:
  1. Loosen the (2) sensor screws [2]. Keep the screws sufficiently tight to control the adjustment.
  2. Lightly tap the clamp sensor [1] away from the TRP until Draw Bar Closed = 0.
  3. Push RESET. If the adjustment is correct, Draw Bar Closed changes to 1.
  4. Remove the 0.02" (0.508 mm) feeler gauge. Put a 0.04" (1.016 mm) feeler gauge between the TRP and the drawbar.
  5. Do Step 6 again.

Step 8

Push the tool-release button (2) more times to make sure Draw Bar Closed does not change from 1 to 0.

If Draw Bar Closed = 1, the adjustment to the clamp sensor is not necessary.

Torque the (2) clamp sensor screws. Refer to Haas Fastener Torque Specifications. Use the value for iron.

Set Parameter 76, LOW AIR DELAY, to 1500.
Do some tool changes to make sure that the TRP is correctly adjusted. Make sure the TRP has no leaks.

Be aware: Many service and repair procedures should be done only by authorized personnel. The service technicians at your Haas Factory Outlet (HFO) have the training, experience, and are certified to do these tasks safely and correctly. You should not do machine repair or service procedures unless you are qualified and knowledgeable about the processes.

Danger: Some service procedures can be dangerous or life-threatening. DO NOT attempt a procedure that you do not completely understand. Contact your Haas Factory Outlet (HFO) and schedule a service technician visit if you have any doubts about doing a procedure.

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