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Get zeto position Gcode in Marlin

Posted by Jori

Jori

Get zeto position Gcode in Marlin
March 30, 2020 09:57AM

Registered: 4 years ago
Posts: 3

I was wondering whether there is a G-code in Marlin that does the same or something similar like the old M117 'Get zero position' command in FiveD? Or whether the old code is still available somewhere?
I want to be able to more my printhead to a point on the build plate and have it report back the number of seps/units from that point to the home position of the X and Y axis.
Hope someone can help out.

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Dust

Re: Get zeto position Gcode in Marlin
March 30, 2020 10:12AM

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Registered: 13 years ago
Posts: 7,000

M114 reports current position in marlin. in mm from 0,0

And wow, FiveD, thats going back a bit...

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Jori

Re: Get zeto position Gcode in Marlin
March 30, 2020 10:15AM

Registered: 4 years ago
Posts: 3

Does that work when moving the head by hand with motors disabled or only when moving using the jog controls?

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Dust

Re: Get zeto position Gcode in Marlin
March 30, 2020 11:03AM

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Registered: 13 years ago
Posts: 7,000

only with jog. there is zero feedback from stepper motors. You would need additional hardware such as a positional encoder and the firmware to understand that.

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Jori

Re: Get zeto position Gcode in Marlin
March 30, 2020 01:15PM

Registered: 4 years ago
Posts: 3

My plan was to make it count the steps back to the endstops to measure the distance. If I understand correctly that is how M117 worked in FiveD.

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Dust

Re: Get zeto position Gcode in Marlin
March 31, 2020 01:03AM

Admin
Registered: 13 years ago
Posts: 7,000

You should also be aware that moving steppers by hand produces electricity, This can damage stepper drivers.