Calibration - Standard Deviation exceeds limits

I am having a problem getting my 1mmx27.5 probe tip to calibrate.

I have cleaned the 1mm ruby tip and the calibration sphere. I even changed out the 1mm tip with a new one.

Here is the report:

Probe file=T-PROBE_T1X27_M2 Date=6/17/2013 Time=10:05:21 AM

T1A0B0 THEO X 0.000 Y -5.700 Z 124.320 D 1.000
T1A0B0 MEAS X -0.030 Y -5.615 Z 124.425 D 0.895 StdDev 0.013

Why does the diameter keep coming out to 0.895?

JamesMannes over 11 years ago

What they all said
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RCW52 over 11 years ago

Is there a way to control the trigger force or is that an issue with the MIP head?

yes there is ...F10 / OPTIONAL PROBE TAB
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hemirunner over 11 years ago

yes there is ...F10 / OPTIONAL PROBE TAB

I know this is old but for the record this does not work with anything except an analog probe. Trigger force is set by the module with a tp20 system and with an MIP head if you rotate to a90 you will see a little Allen screw that is exposed. This affects trigger force and should be adjusted with a calibrated gram gage.
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RBORTZ over 11 years ago

http://www.cmms.com/deflection-calculator-tm/
Here's a helpful calculator.
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Kaji Ryoji over 11 years ago

Yea, my opinion is that it's a combination of flex and probe build. Trying to use a star stylus + that tip. It would be better if you had a tp-20 and a light force module but with that much weight on the end of it I doubt you would get any better results. When I use that stylus I never use any extensions or knuckles, and only on a TP-20 light force module.
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chad.greenwell over 11 years ago

It's all Renishaw.
Here is my build:

PROBEMIP NoDraw

You can change the mechanical trigger force of an MIP by rotating the probe to A90B180. You'll see a small hole that that you can insert with a 1.5mm allen wrench to change the trigger force. Make note of the number of turns you make. I suggest moving 90 degrees at a time and testing the probe. Do not over tighten or loosen the adjustment, if you feel resistance that's the ends of the adjustment.

You can take this a step further by using a gram force gauge and using the trigger force specs provided by Renishaw, but gram force gauges are typically expensive.
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