No End stops Prusa i3 Mrk 3 ?
January 05, 2018 05:25AM
Hi Guys
Have anyone been able to change their Printer similar to the Prusa i3 MRK3 where the printer does not use end stops for X & Y axis ?

How did you go about doing it ?

Thanks
Vaughan
Re: No End stops Prusa i3 Mrk 3 ?
January 05, 2018 06:57AM
Install tmc2130 stepper drivers with SPI interface

Install latest marlin with tmc2130 driver support and enable it in configuration_adv.h

One of the extra pin on the driver is wired to the endstop pins.
NB it only detects lack of movement in the direction of movement, so good for endstops and some skip detection

See toms guide for ramps... [toms3d.org]

NB if you have a LCD its harder, as you need to get to the SPI pins, which is used by the LCD cables (depending on the controller)
Re: No End stops Prusa i3 Mrk 3 ?
January 05, 2018 09:59AM
Quote
scubi
Hi Guys
Have anyone been able to change their Printer similar to the Prusa i3 MRK3 where the printer does not use end stops for X & Y axis ?

How did you go about doing it ?

Thanks
Vaughan

Several users of Duet electronics have done this on various printers. It is supported by the current stable release of RepRapFirmware as standard. I documented the process at [duet3d.com]. To find people using it, go to [www.duet3d.com] and search for "sensorless homing".



Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
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