A probing question

[cropwell]

Hi Brian,

I was just wondering if a wiggler probe could be used as part of a touch probe (after cutting off the ball that goes into the holder) and had a look at my set. I had never noticed that it was Imperial. So I had a look on t'interweb and they seem to be all the same. I suppose the size of your balls is not too relevant to the function of your wiggler. The shaft of the probe is 3mm, but the ball end is 1/4".

I can't comment on your repeatability problem, but a few years ago I thought about using QTC (Quantum Tunnelling Compound), which is a sponge like material that has a high electrical resistance that goes to near zero when compressed. It was withdrawn from the market as it was not reliable re the point when it went into conduction, so my simple probe design would not have worked accurately enough to be of any use.

Cheers,

Rob