Triple Z Axis G32 Bed Traming

Turricann

@Phaedrux I see i had not set the probe offset, however the bed is still not tramming correctly any other thoughts ?

fcwilt

@Turricann said in Triple Z Axis G32 Bed Traming:

@fcwilt

Doing a single G30 probes the bed @X0, Y0(Bed center), Doing a G1 Z0 the nozzle moves so its touching the bed.

Thanks.

Seems like your Z probe is configured and working correctly.

Perhaps the following may help:

I don't do multiple passes in my bed.g - just one. And I also end the bed.g processing with setting the Z=0 datum at the center of the bed.

I obtain multiple passes by ending my homez.g file with two G32 commands.

Frederick

Turricann

@fcwilt

I have changed the M671 leadscrew Positions from where the leadscrews are to the pivot points under the bed as in @CaLviNx config.g example.

The bed leveling now seems more consistant,
1/2/2021, 9:51:43 PM G32
Leadscrew adjustments made: 0.291 0.320 0.311, points used 3, (mean, deviation) before (0.307, 0.010) after (-0.000, 0.000)
1/2/2021, 9:50:43 PM G32
Leadscrew adjustments made: 0.307 0.299 0.307, points used 3, (mean, deviation) before (0.305, 0.004) after (-0.000, 0.000)
1/2/2021, 9:49:43 PM G32
Leadscrew adjustments made: 0.308 0.294 0.297, points used 3, (mean, deviation) before (0.300, 0.005) after (-0.000, 0.000)

fcwilt

@Turricann said in Triple Z Axis G32 Bed Traming:

@fcwilt

I have changed the M671 leadscrew Positions from where the leadscrews are to the pivot points under the bed as in @CaLviNx config.g example.

The bed leveling now seems more consistant,
1/2/2021, 9:51:43 PM G32
Leadscrew adjustments made: 0.291 0.320 0.311, points used 3, (mean, deviation) before (0.307, 0.010) after (-0.000, 0.000)
1/2/2021, 9:50:43 PM G32
Leadscrew adjustments made: 0.307 0.299 0.307, points used 3, (mean, deviation) before (0.305, 0.004) after (-0.000, 0.000)
1/2/2021, 9:49:43 PM G32
Leadscrew adjustments made: 0.308 0.294 0.297, points used 3, (mean, deviation) before (0.300, 0.005) after (-0.000, 0.000)

Did you try adding the G30 in your bed.g file to set the Z=0 datum after the leveling phase?

Your bed seems level but has a Z offset.

Frederick

fcwilt

@Turricann said in Triple Z Axis G32 Bed Traming:

I have changed the M671 leadscrew Positions from where the leadscrews are to the pivot points under the bed as in @CaLviNx config.g example.

@dc42 - is that the correct way to set M671 for printers with kinematic mounts?

Thanks.

Frederick

A Former User

@fcwilt said in Triple Z Axis G32 Bed Traming:

@Turricann said in Triple Z Axis G32 Bed Traming:

I have changed the M671 leadscrew Positions from where the leadscrews are to the pivot points under the bed as in @CaLviNx config.g example.

@dc42 - is that the correct way to set M671 for printers with kinematic mounts?

Thanks.

Frederick

Sigh, this is yet another reason I add a disclaimer....

jay_s_uk

@fcwilt I would've thought gloomyandys answer was sufficient

fcwilt

@jay_s_uk said in Triple Z Axis G32 Bed Traming:

@fcwilt I would've thought gloomyandys answer was sufficient

Why?

dc42 did the code - who knows if these special cases were taken into account or if it even matters.

Even though I have kinetic mounts specifying the position of the leadscrews works fine.

Frederick

Phaedrux

@fcwilt said in Triple Z Axis G32 Bed Traming:

who knows if these special cases were taken into account or if it even matters.

It's an approximation of location at any rate, since you're trying to approach zero, the farther off your estimate is, the longer it takes to reach. It says the position of lead screws, but that's just an assumption that most people will have printers with lead screws and won't have specifically designed pivot points, in which case, the lead screw is the natural pivot point. So technically, M671 is defining the pivot point, but in practice that's most commonly going to be a lead screw, and even more practically, it doesn't matter so much as long as you're "pretty close".

fcwilt

@Phaedrux said in Triple Z Axis G32 Bed Traming:

It's an approximation of location at any rate...

Thanks for the feedback. It is consistent with my experiences.

Frederick