[ATTIgeek]

My company purchased an 07 VF2 that seems to have a flaky PCOOL unit. Despite low hours, there seems to be a long history of alarms with the PCOOL. I saw the following prior posts:


http://www.cnczone.com/forums/haas-m...t-failure.html
http://www.cnczone.com/forums/haas-m...nt-nozzle.html
http://www.cnczone.com/forums/haas-m...cool-help.html
http://www.cnczone.com/forums/haas-m...t-failure.html




The unit seems to have (and can be) driven past the limit. I downloaded the electrical service manual but that only serves to confuse me further because it shows cable 200 as only four conductors. A cable 180 is mentioned but not detailed in the manual. The PCOOL unit that is installed has at least seven conductors:


2 wires to the motor
2 wires to upper microswitch (senses motor rotation)
3 wires to lower microswitch (senses end of travel limit)


There also appears to be a surface mount resistor in clear shrink sleeve. I though I read in one of the posts that the resistor kicks in when the lower switch reaches end of travel to limit current. The Grainger motor mentioned in the one post does not look like the motor in my unit.


When the unit was first opened, it was driven past one end of travel. It was physically put back, but the motor seems weak to drive yet it is not binding. I suspect the lower switch (NC/NO) may be wired backwards, even the the labels match the switch. The switch itself operates properly on both sides.


Can anyone provide a better idea of how this thing is wired (color code)?

-Thanks-

[HelicopterJohn]

Hi,

Couple of questions:
1: Can you post some pictures of the unit and associated connectors.
2: How many positions does your PCOOL have. Old style 20 position or the newer 30+ position model?

I have done some repairs on the older model 20 polsition model. i.e. replacing the microswitch that counts the steps.

John

[RBrandes]

My service tech was here on Tuesday. He told me that sometimes the work will bump the tube or someone will try to move it by hand. The internal gears are plastic and sometimes get damaged.
Regards, Ray

[n0xx187]

John i am having some issues with my pcool on a vf2.. i took it apart to check it out and now i forgot how the dang wires go... here are some pics any help would be awsome..

2 wires to the motor
2 wires to upper microswitch (senses motor rotation)
3 wires to lower microswitch (senses end of travel limit)