My existing ‘touch plate’ has served me well over the years but as this relies on electrical contact between the ‘tool’ and the ‘plate’ it was just not possible to use it with the diamond and ceramic tipped tools I now have occasion to use.

Something a bit more sophisticated was required and an active, ‘probe type’, low profile, tool height setter seemed to be on the cards.

This is my first prototype and as luck would have it, works just as intended.

If others are interested, I would be pleased to post full constructional details of the project (together with the GCode files) once it has been fully tested and I am certain there are no hidden or unforeseen snags.

Tweakie.

............. and as luck would have it, works just as intended.

Ha ..... Be careful not to confuse "Luck" with the "Skills of a Master". 
Looks great Tweakie !
Please be sure to post the details when finished, very nice addition to your arsenal.

Regards,
Russ
 

That's a nice one Tweakie! Thanks for sharing it with us.

Thanks guys, you are too kind.

I am going to re-layout the PCB as the prototype did not give quite enough space to solder the LED easily and I am still awaiting delivery of some different sized music wire as I have not yet finally decided on the appropriate contact spring pressure but it is all looking good so far.

This is the prototype PCB and top cover (the electrical contacts are on the other side of the PCB).

Tweakie.

Very nice, having read many of your posts, I don't believe there is anything you can't accomplish when there is a need and a desire to build.

Very nice Tweakie!  Thomas hit the nail on the head.  That Tweakie is one sharp tack!

Brett

Looks good Tweakie. Make a bunch and suprise us with a gift.......
RICH

And we don't want that cheesy, cheap button, either. We want it made from platinum or at least gold.

Thank you for all the complements guys.

And we don't want that cheesy, cheap button, either. We want it made from platinum or at least gold.

Hi Sam,

This will make you smile....

The base / casing is made from aluminium and once it was finished, I swear I could hear your words saying "go on - anno it" so it was duly anodized and now has a silky smooth finish all thanks to you. 

Tweakie.

Looks great, will be very keen to see it's development.