CMM Hardware - Renishaw Probe Magnetism question

[silentrunning]

Has anyone had a problem with using a Renishaw probe in the vacinity of a magnet? While checking an assembly with an embedded magnet in it, the probe seems to freeze up when it gets near the magnet or the steel parts affected by the magnetic. I'm curious if this is normal.

[Randy Lefferts]

In Reply to Parent Post by silentrunning

Has anyone had a problem with using a Renishaw probe in the vacinity of a magnet? While checking an assembly with an embedded magnet in it, the probe seems to freeze up when it gets near the magnet or the steel parts affected by the magnetic. I'm curious if this is normal.

Are you using a magnetic body with the probe? A magnetic TP20 will suffer if around a magnet. Would have to get a demagnetized TP20 (non inhibitive? I think it may be).

[JAltmann]

Yup you'll need to use a TP2/TP6 around the magnet. TP20/200/TP7 no like the magnetic field. I seem to recall their was a version of the TP200 that could work around magnets? I might be mis-thinking tho, it has been awhile.

[AndyN]

In Reply to Parent Post by silentrunning

Has anyone had a problem with using a Renishaw probe in the vacinity of a magnet? While checking an assembly with an embedded magnet in it, the probe seems to freeze up when it gets near the magnet or the steel parts affected by the magnetic. I'm curious if this is normal.

Unless it's a strain gauge style, the (older) probes have a mechanism which is susceptible to magnetism. The later (TP20?) probes only use the (similar) mechanism for over travel to prevent damage, not to detect a touch.

[Randy Lefferts]

In Reply to Parent Post by JAltmann

Yup you'll need to use a TP2/TP6 around the magnet. TP20/200/TP7 no like the magnetic field. I seem to recall their was a version of the TP200 that could work around magnets? I might be mis-thinking tho, it has been awhile.

There is also a non magnetic TP20 as well. We use mostly TP2/TP20 and the TP20's are the non inhibitive (I believe that's what they are referred as) type. They are basically demagnetized and can work around magnetic items.

[silentrunning]

It is a TP20 tip. Thanks all for the input. I will research getting a tip that won't be affected.

[Randy Lefferts]

In Reply to Parent Post by silentrunning

It is a TP20 tip. Thanks all for the input. I will research getting a tip that won't be affected.

Hi Silent,

This is a link to get you started. I am not trying to get you to order from them, I am just providing you something to start with. They were the first one in the list when I did a search.

Hope this helps.