[amphib]

The programmable coolant unit on my Haas Super Mini Mill began acting up yesterday. Here are the symptoms. At first, the nozzle would swing away from its programmed position. Sometimes I could get it back to the proper position by using the 'Coolant Up' and 'Coolant Down' buttons, but these were not always reliable. As the day progressed, the problem became worse and the machine started to shut down during operations with a 'Coolant Spigot Alarm'. Today the machine wouldn't run at all, alarming out before any cutting could begin. I took the cover off the P-Cool unit and inspected the workings. Although I didn't check them with a multimeter, the micro switches seem to be properly triggered. There's no excess friction anywhere and I can easily turn the gear train by hand. Does anyone have any suggestions for fixing this?

[HelicopterJohn]

Hi,

I have a 2007 HAAS TM-1P that I retrofitted with a used PCOOL unit. Mine was the older style 20 position PCOOL unit.

The PCOOL unit was broken and would not operate correctly. It would oscillate back and forth and not go to the commanded position. I received the "Coolant Spigot Alarm" similar to yours. Although the micro switch that counted the pulses looked O.K. it was broken internally. I replaced the micro switch and it has worked flawlessly for years and still going strong.

Here is a link to the post I made on the repair.
http://www.cnczone.com/forums/haas-m...cool-help.html

Here is another link that has pictures that show they style of PCOOL Unit I have.
http://www.cnczone.com/forums/haas-m...nt-nozzle.html

HAAS PCOOL operation demonstration
https://www.youtube.com/watch?v=wT3BwMbK4oU

Some other videos to modifications that I made to my 2007 HAAS TM-1P that you may find useful. Note: These would be attempted at your own risk.

Programmable Coolant Air Solenoid Introduction
https://www.youtube.com/watch?v=B1ArxUjLy5c

Coolant Air Solenoid Installation Part 1
https://www.youtube.com/watch?v=Xfrhq8aCu38

Air Coolant Installation Video Part 2
https://www.youtube.com/watch?v=IxOgYId27tw

HAAS TM-1P Air Solenoid Valve Utilizing M23 Relay
https://www.youtube.com/watch?v=zssH53f_7sA

PCOOL Installation on 2007 HAAS TM-1P CNC Mill.wmv
https://www.youtube.com/watch?v=LWt0R58VTs0

Hope this was of some help.

John

[amphib]

Hi John,

Thanks for your reply. You also helped me out a few years ago when I was putting in a solenoid-controlled air blast setup. Anyway, my PCool is the newer model, so the guts look quite a bit different than yours. I've got to come up with some solution other than replacing the unit, since the local Haas HFO quoted $1,600 for the part! Sure would be nice if the problem was just a microswitch.

Thanks again,

Bill