Probe center of hole?

rzi

I'm using the duet for my Workbee CNC. On my other cnc machine, a GRBL driven Sourcerabbit mill, I'm able to probe the center of a hole. Very useful for my custom fixtures and in many other cases.

I'm not sure how to make a macro for the duet that can probe the center of a hole as there is no way to use variables in duet macros .

Maybe I'm missing something basic?

Any advice is welcome.

Cheers
Rickard

gtj0

I have absolutely NO CNC experience but does this help at all...

https://duet3d.dozuki.com/Wiki/Gcode#Section_M675_Find_center_of_cavity

rzi

Yes, it seems to be exactly what I'm looking for. Off to the workshop to test.

dc42

M-codes 673, 674 and 675 are not implemented in standard RepRapFirmware. I don't know who added them to the GCodes wiki page.

A Former User

While we wait for potential support for G38.x this is what is suggested, but I can't say I've tried it for your use:

https://duet3d.dozuki.com/Wiki/Gcode#Section_M585_Probe_Tool

wilriker

@dc42 said in Probe center of hole?:

M-codes 673, 674 and 675 are not implemented in standard RepRapFirmware. I don't know who added them to the GCodes wiki page.

@chrishamm and me both have a (very similar) implementation for M675. His is in his v2-chrishamm branch and I could provide a PR ~~within minutes~~ right away.

dc42

@wilriker said in Probe center of hole?:

@dc42 said in Probe center of hole?:

M-codes 673, 674 and 675 are not implemented in standard RepRapFirmware. I don't know who added them to the GCodes wiki page.

@chrishamm and me both have a (very similar) implementation for M675. His is in his v2-chrishamm branch and I could provide a PR ~~within minutes~~ right away.

Please can you and chrishamm agree on a single implementation.

wilriker

@dc42 I checked his implementation against mine and the only difference is that mine uses existing helper functions to simplify code and adds some errors for missing parameters. Since we implemented it for the same reason and my implementation is currently used I would say use mine.

EDIT: Here's the Pull Request.

deckingman

More divergence between the needs of CNC users and FDM users.......

wilriker

@deckingman Now you're on the hunt...

gtj0

@dc42 said in Probe center of hole?:

M-codes 673, 674 and 675 are not implemented in standard RepRapFirmware. I don't know who added them to the GCodes wiki page.

@rzi Oops, sorry about that. I didn't notice they weren't implemented.

dc42

@wilriker said in Probe center of hole?:

@dc42 I checked his implementation against mine and the only difference is that mine uses existing helper functions to simplify code and adds some errors for missing parameters. Since we implemented it for the same reason and my implementation is currently used I would say use mine.

EDIT: Here's the Pull Request.

Thanks. Can you do a separate PR for RRF 3 to support using a Z probe as an alternative to an endstop switch, using the same mechanism as M585 in RRF3? See https://duet3d.dozuki.com/Wiki/RepRapFirmware_3_overview#Section_M585.

wilriker

@dc42 said in Probe center of hole?:

Can you do a separate PR for RRF 3 to support using a Z probe as an alternative to an endstop switch, using the same mechanism as M585 in RRF3?

I'll probably provide this either today or early next week.

wilriker

@dc42 There you go: Pull Request for RRF 3.

wilriker

@dc42 I totally forgot: an implementation for M673 can also be found in v2-chrishamm branch in your repo. But since I don't know what it all comprises besides the code in GCode2.cpp I can't tell you what to take over. Also it seems he started implementing M674 but it's not finished.

rzi

@gtj0 said in Probe center of hole?:

@dc42 said in Probe center of hole?:

M-codes 673, 674 and 675 are not implemented in standard RepRapFirmware. I don't know who added them to the GCodes wiki page.

@rzi Oops, sorry about that. I didn't notice they weren't implemented.

No problem. An implementation seem not too far away it seems, if I interpret the other posts right. Good thing!

wilriker

@rzi said in Probe center of hole?:

No problem. An implementation seem not too far away it seems, if I interpret the other posts right. Good thing!

My pull requests have been accepted today so it will be in 2.03RC4 and also in the next 3.0 build.

dc42

2.03RC4 is now released. Thanks @wilriker for the PR.

rzi

@dc42 said in Probe center of hole?:

2.03RC4 is now released. Thanks @wilriker for the PR.

Damn, you guys are fast as lightning! Thanx