Calibration for star probes

[Mike Riffel]

I have a MIH probe head and have calibrated all the probes (1 - 5) configured as a star probe with the head at A0B0. I then turned the head to A90B0 and calibrated all the probes in the orientation. When I check all the probes to a plane in the Z axis, the A0B0 check within .00013", but with it at A90B0 they all check .043 - .044". What is going on? I need help! thanks

[JamesMannes]

Go here to start...

http://pcdmisforum.com/attachment.php?attachmentid=695&d=1158259178

then try this one...

http://www.box.net/public/6db96oashp

[John Kingston]

This might help too.

http://pcdmisforum.com/showthread.php?t=2816

Also, how long is the probe? It may weigh too much. Does it cause false triggers?

[craiger_ny]

.........Also, how long is the probe.......?

Let's try and stay on topic John. Why are you always dragging things in this direction?

[John Kingston]

Let's try and stay on topic John. Why are you always dragging things in this direction?

Because your probe was too short......

[Mike Riffel]

The #1 probe is 3mm dia x 20mm long. All others are 3mm dia x 36mm long. I am using a medium force TP20 trigger probe. I have had a few false triggers, but for the most part it works fine. I do plan on buying an extended force trigger probe as soon as our company lets us buy equipment again. I will try and align the probes again and then recalibrate. I did have it aligned quite well, but will do it again.

[Mike Riffel]

I have realigned the probes and recalibrated starting with #1 and then #2 - #5. I then recalibrated again. But, I'm still getting these results: #1 = .06313"; #2 = .04071"; #3 = .03970"; #4 = .04123" #5 = .04038". What else can be done? HELP!!!

[cmmguy]

It is the TP20 probe. The "pull" trigger is terrible and will cause your tip cals on star probes to suck pretty bad.

[Mike Riffel]

So what should I do now!

[Wes Cisco]

Well we usually advise at this point that you should begin drinking heavily and seriously consider a career change! But. . . if that course of action does not appeal to you. . . You really only have a few choices. 1) Use small and lighter tips. 2) Beg, borrow, steal, or purchase a tp2. 3) Program or reprogram to inspect the part using a single tip and many wrist angles. HTH