TSC-300/1K - How it Works and Troubleshooting Guide

How it Works

The Through-Spindle Coolant (TSC-300/1K) with Auto-Clean filter uses a gear-driven pump that is mounted in the coolant tank to move pressurized coolant through the cutting tool. The coolant then returns to the coolant tank. The coolant continuously cycles through the coolant system.

  1. TSC Auto-Clean Coolant Pump: Pressurizes and pumps the coolant from the coolant tank through the TSC system. The auto-clean pneumatic cylinder eliminates the need for an inline filter. When the pump stops, the pneumatic cylinder activates, cleaning the filter and preventing chips from entering the TSC system. A vacuum sensor detects if the filter is clogged.
  2. Check Valve: A one-way valve that lets coolant flow through in one direction. It does not let the coolant flow back down into the tank when the pump is powered off. The pressure sensor in the check valve tells the control that the system is working.
  3. Vacuum Generator: This creates a vacuum effect to remove excess coolant from the TSC system.
  4. Precharge Solenoid (40-Taper belt-driven): During TSC operation, the precharge solenoid applies low-pressure air to the Tool Release Piston. This helps to maintain a seal between the TRP and the top of the drawbar.

    or

    TSC Union Solenoid (50-Taper or inline): During TSC operation, the coolant union solenoid applies low-pressure air to the coolant union. This helps to maintain a seal between the rotating and non-rotating parts.

TSC-300 Pump Diagram

TSC-1K Pump Diagram

This graph shows approximate pressure vs. tool orifice diameters.

Use M88 to activate TSC, and M89 to deactivate it. You can also press AUX CLNT to activate and deactivate TSC.

Symptom Possible Cause(s) Corrective Action(s) Section

Alarm 151 LOW THROUGH SPINDLE COOLANT

A short circuit in the pump motor or pump motor cable caused a fuse to blow or a circuit breaker to trip.

Check the circuit breakers and fuses on the power supply PCB.

Check for shorts in the TSC pump cable and the motor leads.

1
Incorrect power phasing - the pump motor is running backward. Check the phasing indicators and change the incoming power cables, if necessary. 2
Damage to the motor shaft key, shaft collar, or wear in other parts of the pump head assembly. Inspect the motor shaft / pump head assembly. 3
The TSC pressure sensor is defective. Some coolant flow may occur if this is the case. Troubleshoot the coolant pressure sensor. 4

Low coolant flow, no alarm.

Low coolant flow, the pump cavitates (cavitation sounds like heavy grit in the pump head, or a suction sound) or is otherwise noisy

Damage to the motor shaft key, shaft collar, or wear in other parts of the pump head assembly. Inspect the motor shaft / pump head assembly. 3
The coolant does not return to the coolant tank fast enough. Remove chip buildup from the coolant return path. 5
The coolant level in the coolant tank is low. Fill the coolant tank.
The pressure relief spring in the pump head is damaged. Inspect the pressure relief spring. 6
The TSC pump filter or intake strainer is clogged. Clean the filters. Remove chips from the coolant system. 7
The Auto-clean coolant pump filter does not work (if equipped). Test and troubleshoot the Auto-clean pump filter.

Section 1

Symptom:Alarm 151 LOW THROUGH SPINDLE COOLANT.

Possible Cause:A short circuit in the pump motor or pump motor cable caused a fuse to blow or a circuit breaker to trip.

Corrective Action:

1. Check for a blown fuse or a tripped breaker:

TSC-300 - On the power supply PCB: Make sure that the fuses at F1 and F3 are not blown. If there are blown fuses, check for shorts in the motor or motor cable in Step 2 before you replace the fuses.

TSC-1K - On the motor drive PCB: Make sure the circuit breaker [2] on the motor drive PCB is in the ON position.

If the circuit breaker has tripped, turn it back on. Test the TSC system. If the circuit breaker trips again, check for a short circuit in the TSC pump.

note: On pumps made before December, 2016, you must use water-based coolants with The TSC-1K system. Thicker fluids like cutting oil will overload the pump and trip the breaker.

2. Check the pump for shorts:

Measure the (3) leads [3] to ground [4] on the TSC power cable. If all leads [3] test open to ground [4], the pump and cable do not have a short.

If the motor cable leads [3] indicate a short, disconnect the cable from the motor. Measure the (3) cable leads [5] to ground [6]. If any lead tests short, the pump is at fault. If none of the leads [5] test short, the cable is at fault.

3. If all leads test OK:

Check the TSC motor for binding that could cause an over amperage condition.

Section 2

Symptom:Alarm 151 LOW THROUGH SPINDLE COOLANT.

Possible Cause: Incorrect power phasing - the pump motor is running backwards.

Corrective Action:

The power supply PCB has a phase detect with neon indicators on the top center portion of the board. Make sure that the electrical power is phased correctly:

  • Green Light: The incoming power is phased correctly.
  • Orange Light: The incoming power is incorrectly phased.
  • Both Lights: A phase is missing (there is a loose cable in the system).

If the electrical power is phased incorrectly:

Set the main circuit breaker on the machine to the OFF position.

Lock the main circuit breaker. Use an approved lock with an approved safety tag.

Swap the #74 and #75 incoming power cables at the main transformer.

Section 3

Symptom: Alarm 151 LOW THROUGH SPINDLE COOLANT. Low coolant flow, no alarm. Low coolant flow, the pump cavitates (cavitation sounds like heavy grit in the pump head, or a suction sound) or is otherwise noisy.

Possible Cause: Damage to the motor shaft key, shaft collar, or wear in other parts of the pump head assembly.

Cutting abrasive materials causes premature wear on the coolant system, resulting in reduced pressure. Use additional filtration when you cut abrasive materials.

Corrective Action:

Remove the pump from the tank. Rotate the pump motor fan [1] by hand clockwise. Make sure that the pump coupling [2] also turns.

If it does not turn, separate the pump from the motor. Check for a damaged key on the motor shaft.

Section 4

Symptom: Alarm 151 LOW THROUGH SPINDLE COOLANT.

Possible Cause: The TSC pressure sensor does not work. Some coolant flow may occur if this is the case.

Corrective Action:

Press PARAM/DGNOS. Go to the I/O diagnostics page.

Short the sensor connector leads. The Low TSC Pressure bit state should change from 1 to 0.

If it does not change, then the cable or the I/O PCB is damaged. Measure for resistance at both ends of the cable. If the cable has resistance, go to diy.haascnc.com to troubleshoot the I/O PCB.

The pressure switch is connected to a bracket above the spindle. Replace the pressure switch if it is defective:

If the bit changes, use an inline pressure gauge to verify the pressure is correct. If the pressure is over 40 psi, replace the switch.

Section 5

Symptoms: Low coolant flow, no alarm. Low coolant flow, the pump cavitates (cavitation sounds like heavy grit in the pump head, or a suction sound) or is otherwise noisy.

Possible Cause: The coolant does not return to the coolant tank fast enough. The coolant level in the coolant tank is low.

Chips build up in the auger trough [1], and the coolant return drain [2] on the enclosure pan. This slows the coolant from returning to the coolant tank.

Corrective Action:

Remove all chips from the the auger trough [1], and the coolant return drain [2].

Click the links, or go to diy.haascnc.com to complete these tasks:

Section 6

Symptoms: Low coolant flow, no alarm. Low coolant flow, the pump cavitates (cavitation sounds like heavy grit in the pump head, or a suction sound) or is otherwise noisy.

Possible Cause: The pressure relief spring in the pump head is damaged.

Corrective Action:

  1. Remove the TSC pump from the tank.
  2. Remove the pressure relief plugs.
  3. Inspect the spring and valve pin. Replace the spring if it is broken and the pin if it is pitted or worn.

Section 7

Symptoms: Low coolant flow, no alarm. Low coolant flow, the pump cavitates (cavitation sounds like heavy grit in the pump head, or a suction sound) or is otherwise noisy.

Possible Causes: The coolant filter or intake strainer is clogged. The filters are clogged.

Corrective Action:

  • Machines made after March, 2015: Press the plunger down (5) times to clean the filter. Make sure that the auto-clean plunger activates when the TSC pump shuts off. If it does not activate, go to diy.haascnc.com to troubleshoot the solenoid. Test the TSC purge solenoid.

    Remove the filter tray from the bottom of the TSC assembly. Remove the tray lid [3] from the filter [4]. Use a brush to clean the filter. Install the filter tray to the bottom of the TSC pump assembly.

    If the solenoid operates and it outputs air, check the air tube for kinks or breaks.

  • Machines made before March, 2015: Remove the filter retaining ring [1] and filter screen [2] from the bottom of the TSC pump assembly. Clean the filter screen [2] with warm, soapy water and a soft brush.

Remove the chip basket and polyester mesh strainer (if the strainer is installed) from the chip tray. Remove all chips from the chip strainer basket.

To replace the mesh strainer [5], pull it tightly over the top of the chip basket [7]. Make sure that the elastic band [6] goes over the edge of the chip basket [7].

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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