Haas TSC-300/1K 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
Haas Technical Documentation
TSC-300/1K - How it Works and
Troubleshooting Guide
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Copyright 2020 by Haas Automation, Inc. No unauthorized reproduction | Last Published On December 26, 2016 1/8

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.
Copyright 2020 by Haas Automation, Inc. No unauthorized reproduction | Last Published On December 26, 2016 2/8

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.
Copyright 2020 by Haas Automation, Inc. No unauthorized reproduction | Last Published On December 26, 2016 3/8

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.
Copyright 2020 by Haas Automation, Inc. No unauthorized reproduction | Last Published On December 26, 2016 4/8

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.
Copyright 2020 by Haas Automation, Inc. No unauthorized reproduction | Last Published On December 26, 2016 5/8

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.
Copyright 2020 by Haas Automation, Inc. No unauthorized reproduction | Last Published On December 26, 2016 6/8

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:
Remove chips from the coolant tank. Excessive chips in the coolant tank reduce the amount of coolant the tank can
store. Watch the video Machine Tool Coolant - Cleaning Your Tank - Video .
Fill the coolant tank. Watch the video Standard Coolant – Simplified - Filling your Tank … and More.
Make sure the coolant level sensor operates correctly. Go to the document diy.haascnc.com to troubleshoot the
coolant level sensor..
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.
Copyright 2020 by Haas Automation, Inc. No unauthorized reproduction | Last Published On December 26, 2016 7/8

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].
Copyright 2020 by Haas Automation, Inc. No unauthorized reproduction | Last Published On December 26, 2016 8/8