Programmable Coolant - How it Works and Troubleshooting Guide

How it Works

The Haas Programmable Coolant (P-COOL) option lets you direct coolant to the tool with 34 different spigot positions.

To change the position of the spigot. Press CLNT UP or CLNT DOWN.

You can adjust the spigot in a program block with an M34 or M35 command.

  • The M34 command moves the spigot one position down.
  • The M35 command moves the spigot one position up.

Symptom Possible Cause Corrective Action Section
Alarm 196 COOLANT SPIGOT FAILURE There is no voltage to the P-COOL. Measure the power to the P-COOL. 1
There is low coolant flow from the nozzle. Chips have clogged the P-COOL nozzle or the filters. Remove chips from the P-COOL nozzle and the filters. 2
Chips have clogged the check-valve or the coolant hoses. Remove chips from the check-valve and coolant hoses. 3

Section 1

Symptom: Alarm 196 COOLANT SPIGOT FAILURE

Possible Cause: There is no voltage to the P-COOL.

Corrective Action:

Make sure the connectors for the P-COOL cable that connects through the connector bracket at the spindle head, and to P35 on the I/O PCB, are not contaminated and are properly seated. Check for damage to the cable. Run the program for 12 seconds. If the program is not working, reset the machine.

Run this program in MDI mode:

M34 G04 P1. ;

M35 G04 P1. ;

M99 ;

Find the connection for the P-COOL on the spindle-head connector bracket. While the program runs, use a multimeter with needle-tip probes to measure the voltage across pins 1 and 2, and pins 3 and 1. The voltage must measure 12 VDC. Do not measure the voltage with the cable disconnected.

If there is voltage, check for continuity in the cable between the P-COOL and the connector bracket. If there is no continuity, the cable is at fault. If there is continuity, the P-COOL assembly is at fault.

If there is no voltage, go to diy.haascnc.com to troubleshoot the I/O PCB.

Section 2

Symptom: There is low coolant flow from the nozzle.

Possible Cause: Chips have clogged the P-COOL nozzle or the filters.

Corrective Action:

Make sure the ball valve for the coolant loop on the spindle head is fully open.

Remove any chips that are stuck in the P-COOL nozzle.

Clean or replace the filter element. Check the area around the coolant pump intake for chips.

  1. Auxiliary Filter - The bag filters in the Auxiliary Filter tanks need to be cleaned or replaced. The Auxiliary Filter is an option. Your machine might not have this option.
  2. Standard Filter - The Standard Filters need to be cleaned.

Remove chips from the basket filter in the coolant tank. Go to diy.haascnc.com for information on coolant tank maintenance.

Section 3

Symptom: There is low coolant flow from the nozzle.

Possible Cause: Chips have clogged the check-valve or the coolant hoses.

Corrective Action:

Remove the coolant check-valve. Check it for blockage [1]. Make sure the trap door opens and closes freely. If the trap door does not close, coolant flows back into the tank. This delays the flow of coolant by a few seconds.

Disconnect both ends of the coolant hoses. Remove any kinks. In the opposite direction of the coolant flow, blow air through the hoses to remove any chips. If you find chips in the hoses, check the coolant nozzles and washdown hoses for chip buildup. Connect the coolant hoses.

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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