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MarlinFirmware / Marlin

Marlin is an optimized firmware for RepRap 3D printers based on the Arduino platform. Many commercial 3D printers come with Marlin installed. Check with your vendor if you need source code for your specific machine.
https://marlinfw.org
GNU General Public License v3.0
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[FR] XY compensation for Delta printers #26395

Open kocickamia opened 1 year ago

kocickamia commented 1 year ago

Is your feature request related to a problem? Please describe.

No response

Are you looking for hardware support?

No response

Describe the feature you want

Hello. If my cartesian printer prints object for example 100x100mm square, and result is 100x99.5 rectangle, then i may change steps/mm for appropriate motor. But this method is not applicable for Delta printers, as they needs the same steps/mm for all three motors. In Configuration.h is item SKEW_CORRECTION where i may compensate rhombus to square. Could be add item for compensate rectangle to square in case of a Delta printer?

Additional context

No response

EvilGremlin commented 1 year ago

Fix the problem, not the symptoms. SKEW_CORRECTION is already extremely dubious feature, personally i would never merge it. If you have this result then your geometry values are wrong, or you have something floppy in mechanics.

RatmanL commented 1 year ago

Personally, I think that if this feature exists and is used in other types of printers, it should be applicable to the Delta as well. After all, a mechanical solution to a problem is not always easy to measure and fix. That is the reality. And if there is an option to treat this in software I would definitely take advantage of it.

EvilGremlin commented 1 year ago

No, XY compensation is completely diffrerent ftom skew correction, this is whole new feature. I'm of the opinion that such software compensation is only harmful, becasue it panders to bad hardware manufacturers and bad user practices.

RatmanL commented 1 year ago

I respect your opinion, but I still think that there should be a way to compensate for this deviation in software. If it is a big difference I agree completely with your statement.

jmz52 commented 1 year ago

But this method is not applicable for Delta printers, as they needs the same steps/mm for all three motors.

They don't. You can use different values for each carriage. Personally, I strongly recommend to calibrate steps/mm for each carriage before doing delta calibration.