Dual x and y homing similar to g30 for multiple z screws

[Killernoy]

@dc42 i currently have dual enstop mounts but want to have the mounts on the pint head in order to shorten the xy-motion systen by about 20mm in the z direction.

[fcwilt]

@killernoy said in Dual x and y homing similar to g30 for multiple z screws:

@dc42 i currently have dual enstop mounts but want to have the mounts on the pint head in order to shorten the xy-motion systen by about 20mm in the z direction.

Hi,

I have a similar setup but the endstop sensors are mounted on the frame.

They don't make the XY motion system larger in the Z direction than if I moved them to the printhead.

Can you show where they are mounted now on your printer and explain how moving them would save space?

Thanks.

[fcwilt]

@jay_s_uk said in Dual x and y homing similar to g30 for multiple z screws:

@fcwilt I think you're always going to be stuck with the M208 limits e.g. if you X lower limit was 0 but your endstop was actually at -10, any movement t o get there that wasn't a homing move would be classed as trying to move outside the machine limits.

True but generally moves made to trigger the endstops are homing moves.

In any case I was thinking of my printers which use beam-break IR sensors which typically trigger inside the M208 limits.

Maybe instead of setting anything with the endstops, there should be a way of moving a specific motor within a multidriver axis setup.
So home your axis and then adjust the position of one of the motors by a set amount after which they remain in sync

That could work but would be a very tiny bit less efficient then being able to have each endstop specify a different location.

Frederick

[Killernoy]

@fcwilt they are at the bottom of the corner pieces and are activated with a foot on the carriage and the entiere homing system is about 25mm high

[fcwilt]

@killernoy said in Dual x and y homing similar to g30 for multiple z screws:

@fcwilt they are at the bottom of the corner pieces and are activated with a foot on the carriage and the entiere homing system is about 25mm high

Thanks.

If we had a picture showing all the parts it might answer my question - but we don't so I will ask.

Can you move the endstop sensors higher yet still keep them attached to same parts but on the outside?

Frederick

[Killernoy]

@fcwilt i will put them on the print head but this post was not about discussing where i want to put my endstops but to discuss options for compensative homing like the g30 for multiple leadscrews.

[fcwilt]

@killernoy said in Dual x and y homing similar to g30 for multiple z screws:

@fcwilt i will put them on the print head but this post was not about discussing where i want to put my endstops but to discuss options for compensative homing like the g30 for multiple leadscrews.

Understood.

But what you are asking about would require a probe in the XZ plane and another in the YZ plane.

A very complicated approach to doing what multiple endstops can already do.

Frederick

[Killernoy]

@fcwilt what i was hoping for was that i could put the locations of my belts in have it touch of near the belts do some calculations and be square, thats it. But now that i know that this is not possible i will try something else, but i still think that a function like this could be very usefull.

[fcwilt]

@killernoy said in Dual x and y homing similar to g30 for multiple z screws:

@fcwilt what i was hoping for was that i could put the locations of my belts in have it touch of near the belts do some calculations and be square, thats it. But now that i know that this is not possible i will try something else, but i still think that a function like this could be very usefull.

Try looking at it this way.

A Z probe could be thought of as a "moveable endstop" that is used to determine the position of the bed at multiple points.

Multiple X or Y endstops per axis are somewhat like "fixed probes" that determine the position of the X or Y gantry at multiple points.

Frederick

[Phaedrux]

@killernoy said in Dual x and y homing similar to g30 for multiple z screws:

i still think that a function like this could be very usefull.

DC42 will have a look when he gets a chance. It's an interesting idea that needs some thought.