Auto bed probing and compensation with G29 Development

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eussrh
Posts: 41
Joined: Fri Jul 31, 2015 5:35 am

Re: Auto bed probing and compensation with G29 Development

Post by eussrh » Tue Jul 26, 2016 8:45 am

Nevermind. Figured out the servo pin was on the MEXT1 header. Wired it up for testing and after enabling it in configuration.h, it seems to respond to M280 commands just fine.

zanthor
Posts: 35
Joined: Tue Nov 10, 2015 1:15 pm

Re: Auto bed probing and compensation with G29 Development

Post by zanthor » Sat Aug 27, 2016 11:55 am

So I can't seem to figure out how to setup the appropriate Z offset to make this work right. M206 seems to be storing the value but the printer doesn't seem to pay attention to it - to test this I've set the Z offset at a positive 5, which should back this puppy up into the air and squirt away... but it doesn't...

I've also tried M851, it just says OK and doesn't seem to do anything.

I'm using Simplify3d, Taz5 with a BLTouch sensor, and it's working perfectly if I add the offset in Simplify3d.... but since I have two printers, and the offset is different between them (Only by .1, but still), it'd be nice to have 1 gcode file that worked for both printers!

Rp1030
Posts: 81
Joined: Tue Apr 28, 2015 9:20 am

Re: Auto bed probing and compensation with G29 Development

Post by Rp1030 » Wed Aug 31, 2016 9:13 pm

zanthor wrote:So I can't seem to figure out how to setup the appropriate Z offset to make this work right. M206 seems to be storing the value but the printer doesn't seem to pay attention to it - to test this I've set the Z offset at a positive 5, which should back this puppy up into the air and squirt away... but it doesn't...

I've also tried M851, it just says OK and doesn't seem to do anything.

I'm using Simplify3d, Taz5 with a BLTouch sensor, and it's working perfectly if I add the offset in Simplify3d.... but since I have two printers, and the offset is different between them (Only by .1, but still), it'd be nice to have 1 gcode file that worked for both printers!
Try using G92 in place of M206

zanthor
Posts: 35
Joined: Tue Nov 10, 2015 1:15 pm

Re: Auto bed probing and compensation with G29 Development

Post by zanthor » Wed Aug 31, 2016 9:28 pm

Rp1030 wrote:
zanthor wrote:So I can't seem to figure out how to setup the appropriate Z offset to make this work right. M206 seems to be storing the value but the printer doesn't seem to pay attention to it - to test this I've set the Z offset at a positive 5, which should back this puppy up into the air and squirt away... but it doesn't...

I've also tried M851, it just says OK and doesn't seem to do anything.

I'm using Simplify3d, Taz5 with a BLTouch sensor, and it's working perfectly if I add the offset in Simplify3d.... but since I have two printers, and the offset is different between them (Only by .1, but still), it'd be nice to have 1 gcode file that worked for both printers!
Try using G92 in place of M206
Looking at G92 I'd have to do that on every gcode file, it's not a retained setting... I can already accomplish that effect in S3D using the global offsets, but I have to maintain 2 sets of GCode files then and in the event the offset changes (like when I change toolheads and things aren't back exactly where they were) I have to edit all my GCode again...

zanthor
Posts: 35
Joined: Tue Nov 10, 2015 1:15 pm

Re: Auto bed probing and compensation with G29 Development

Post by zanthor » Wed Aug 31, 2016 9:58 pm

I've done some more digging on this and confirmed it's an issue with M29 ignoring the offset value.

M28 homes everything, if I then G1 Z0 my extruders right where it should be...
M29 then probes the bed and when I G1 Z0 the extruder ignores the offset and floats in the air.

Weekend_warrior1999
Posts: 15
Joined: Fri May 27, 2016 12:52 am

Re: Auto bed probing and compensation with G29 Development

Post by Weekend_warrior1999 » Mon Oct 03, 2016 10:11 pm

The answer to this is posted earlier in this thread. I realize it's been while, but for future members searching the answer is in there.

discojon
Posts: 432
Joined: Sat Mar 07, 2015 1:54 pm

Re: Auto bed probing and compensation with G29 Development

Post by discojon » Sat Oct 15, 2016 9:23 pm

Attached is an updated 12mm inductive probe mount that will fit the Taz 6 / 5 with Olive X stage.

Remove the .pdf estension for the STEP file
Attachments
Heatsink Fan with probe mount.stl
(319.71 KiB) Downloaded 73 times
Heatsink Fan with probe mount.step.pdf
(556.06 KiB) Downloaded 70 times
TAZ 5, Open rails X,Y,Z. Marlin 1.1 RC2. Mangrove dual fan, reinforced extruder mount

forester
Posts: 2
Joined: Tue Jul 17, 2018 5:26 am

Re: Auto bed probing and compensation with G29 Development

Post by forester » Mon Jul 23, 2018 2:20 am

I would LOVE to get my hands on this! Any plans for making a version that will work with folks only using a single extruder?

Awesome job!

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