Center finder

[Traktorist3d]

Yuriy, I wanted to ask if you might find it a good idea to implement a center finder using DRO Touch + Probe Measuring.
For an accurate calculation, it is enough for us to carry out several manipulations.
1. Connect Probe Measuring and enter the function - probe, move Probe Measuring along one of the axes (let it be X) until it touches the edge of the hole, this is the first point (DRO Touch automatically saves it as the initial one)
2. Then move the Probe Measuring back along the same X-axis until there is contact on the other side of the hole. DRO Touch automatically saves it as a waypoint
3. Next, we lead Probe Measuring along the Y axis until the next touch of the hole, this will be point 3.

DRO Touch automatically throws a straight line from point 1 to point 3, bisects it, and this will be the exact center of the hole. Or have I not discovered America and this has already been implemented? )))

[Yuriy]

Yuriy, I wanted to ask if you might find it a good idea to implement a center finder using DRO Touch + Probe Measuring.
For an accurate calculation, it is enough for us to carry out several manipulations.
1. Connect Probe Measuring and enter the function - probe, move Probe Measuring along one of the axes (let it be X) until it touches the edge of the hole, this is the first point (DRO Touch automatically saves it as the initial one)
2. Then move the Probe Measuring back along the same X-axis until there is contact on the other side of the hole. DRO Touch automatically saves it as a waypoint
3. Next, we lead Probe Measuring along the Y axis until the next touch of the hole, this will be point 3.

DRO Touch automatically throws a straight line from point 1 to point 3, bisects it, and this will be the exact center of the hole. Or have I not discovered America and this has already been implemented? )))

Hi,
I think this: https://www.touchdro.com/resources/dro-m...ction.html does everything you are describing, just a bit differently (same basic idea). The "Plus" version will have the option to also add a sub-datum instead of just setting the origin.

Regards
Yuriy

[Traktorist3d]

Got it, great, that's great. Where can I read about the plus version? I understand it will be paid?

I also wanted to know what kind of not bad, not expensive probe will work with TouchDRO without problems and without dancing with a tambourine?


That's interesting how it will work
https://aliexpress.ru/item/1005003466415...8525705862

[MidniteMachinist]

Just got one of those touch probes you linked. Can confirm it works with TDRO.

It has LED's, but you can connect it normally (5V to 5V, GND to GND, SIGNAL to SIGNAL). It does not need to be reverse biased... I checked with an oscilloscope, and moving the probe tip pulls the signal low. Connected to the adapter board, it does do the edge finding function (beta version of app).

Mind you, this is just on the bench, testing electrically. I cannot say whether it's any good as an actual touch probe, at least until I get a chance to get down to the shop.

EDIT: Been playing with it on my mill. Yeah, it's pretty damn accurate. I've got 1um scales on this machine, and it's repeating to the tenth every time. And that's with just a "good-enough" stylus concentricity adjustment.

EDIT 2: So, I center found on a 0.351 hole using the probe... Not carefully, either. Slowly turned the handle until I heard the beep, once in each direction, with no repeats. Drove X and Y to zero, swapped collets, put a 0.351 (minus) gauge pin into a 3/8" collet, and raised the table. The pin slid right into the hole, no deflection.

Yeah, this probe works damn well with TouchDRO. This system is now even more amazing.