Vast XXT measuring . . . up ?

[[Ti...]]

Is the Vast XXT designed to be able to measure up? I mean with a stylus pointing in the Z+ direction?

I have an extension going to Y+ with a small star (https://www.renishaw.com/shop/Product.a ... -5000-7811) so 2 of the Ø1mm balls point down at 45's, and 2 point up. I have a couple of smaller calibration spheres to use, Ø5mm with Ø2.5mm stem.

Once it starts scanning the sphere during calibration routine, it sometimes slips off the side and faults. When I say sometimes I mean most of the time. Now, if I slow it way down and use the Sensitive setting, and try enough times, I can get it to take, but how much am I pushing my luck here?

Any thoughts or suggestions welcome, as I'm just experimenting now to see what would be possible and so far I'm not too comfortable with it.

renishaw.jpg

[[Ri...]]

Yes you can scan up. I have tested this on XXTs on a Contura, DuraMax, and O-Inspect.

How much is your stylus system (with the plate)? How balanced is it?

Could you show some pictures of the whole setup?

[[Ti...]]

And to be honest, it's been months since I've dropped working on it, it could have been the downward tips also. But there was definitely terrible problems with getting all 4 calibrated.

As an FYI, my application is basically what is shown in the Renishaw catalog example, but laid down in the Y+ orientation.

Here is the setup. I was thinking about adding another straight out in the Y+ direction.

pic right.jpgpic left.jpg

[[Ri...]]

This is interesting.

Two possibilities would be the reference sphere information is incorrect or vector direction for the initial probing point for the qualification is grossly off and not being corrected.

[[Ti...]]

You could be right about the angle. I eye-balled the physical orientation intending to be 45° (which is always a tough thing), but I could measure the angle optically to see where it actually lands. I entered the theoretic perfect 45° in the plane during the cal routine - but I suppose at that small scale a little bit of off has a big impact. It wouldn't be that difficult to be more precise in this.

You would use Sensitive and slow it down, correct?