Belt/Gearbox Drive - Tool Release Piston - Pre-charge - Adjustment

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Jewel Stewart
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1 30/40-Taper - Tool Release Piston - Pre-charge - Adjustment - VMC LAST UPDATED: 11/26/2018 Introduction This procedure tells you how to adjust the pre-charge for the Tool Release Piston (TRP) of a 30 or 40-taper inline spindle. Complete this procedure before you adjust the TRP clamp/unclamp switches. Belt/Gearbox Drive - Tool Release Piston - Pre-charge - Adjustment 1 Caution: Do not perform this procedure on a machine that has through-spindle coolant (TSC). This damages the TSC system. Find the knob on the pre-charge air regulator. Turn the knob counter 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. Page 1 of 7 pages

2 Inline Drive - Tool Release Piston - Pre-charge - Adjustment Page 2 of 7 pages

3 1 Caution: Do not perform this procedure on a machine that has through-spindle coolant (TSC). This damages the TSC system. To assemble a pressure gauge assembly: Attach the gauge [1] to the tee-fitting [3]. Attach the (2) quick-release fittings [2] to the tee-fitting [3]. Cut the 1/4" tubing in half. Connect the (2) pieces to the quick-release fittings [2]. Page 3 of 7 pages

2 Remove the toolholder from the spindle. Close the primary air valve. This stops the air supply to the machine. Install a pressure gauge at the output-side of the pre-charge regulator.

4 2 Remove the toolholder from the spindle. Close the primary air valve. This stops the air supply to the machine. Install a pressure gauge at the output-side of the pre-charge regulator. Note: The configuration in the illustrations show one example. This is not the correct configuration for each machine. Open the primary air valve. Turn the pre-charge regulator adjustment knob counterclockwise to the fully out position. Note: For newer machines, the pre-charge regulator is not adjustable. There is no adjustment knob. Run this code in MDI mode: M59 P1120; Set the pre-charge regulator to 30 psi (2.1 bar). Note: On newer machines, the pre-charge regulator has no adjustment knob. You cannot adjust the pressure. Read the pressure gauge. Make sure the pressure is 30 psi (2.1 bar). If the pre-charge regulator cannot keep the pressure at 30 psi (2.1 bar), you must replace it. Push [RESET]. Close the primary air valve. Lock the adjustment knob on the regulator. Remove the pressure gauge from the pre-charge regulator. Open the primary air valve. Page 4 of 7 pages

5 Through Spindle Coolant - Tool Release Piston - Pre-charge - Adjustment Page 5 of 7 pages

6 1 Caution: Do not perform this procedure if the machine does not have through-spindle coolant. The location of the pre-charge solenoid may vary. To assemble a pressure gauge assembly: Attach the gauge [1] to the tee-fitting [3]. Attach the (2) quick-release fittings [2] to the tee-fitting [3]. Insert the 1/4" tubing [4] into one of the quick-release fittings [2]. 2 Disconnect the tube [1] from the output-side of the pre-charge pressure regulator [4]. Put the tube into the top of the pressure-gauge assembly [2]. Connect the 1/4" tube [3] from the pressure-gauge assembly to the regulator. Page 6 of 7 pages

7 3 On some machines, you cannot adjust the regulator. Use the pressure-gauge assembly to make sure the regulator operates correctly. To make sure the regulator [2] operates correctly: Adjustable regulator: Push and hold the button on the pre-charge solenoid valve [1] for 20 seconds. Pull the regulator adjustment knob to unlock it. Set the air pressure to Belt/Gearbox: 4 psi (0.28 bar)inline: 30 psi (2.1 bar). Release the solenoid button. Push and hold the button on the solenoid valve [1] for 20 seconds. Make sure the gauge shows Belt/Gearbox: 4 psi (0.28 bar) Inline: 30 psi (2.1 bar). Release the solenoid button. Push the regulator adjustment knob to lock it. Non-adjustable regulator: Push and hold the button on the pre-charge solenoid valve [1] for 20 seconds. Make sure the gauge shows Belt/Gearbox: 4 psi (0.28 bar) Inline: 30 psi (2.1 bar). If the gauge does not shows the correct pressure, the regulator is defective. Replace the regulator. Both: Remove the pressure-gauge assembly from the regulator. Page 7 of 7 pages

The following forms are included. Computer files are contained in the directory v:\aqg_ops\improve\field_information\mailaudt. 1point.

$The following forms are included. Computer files are contained in the directory v:\aqg_ops\improve\field_information\mailaudt. 1point.$ TI 201B Forms for Flow Audits by Site Operators The following forms are included. Computer files are contained in the directory v:\aqg_ops\improve\field_information\mailaudt date initials 1point.doc 10/20/95