Prusa firmware for RAMPS Prusa i3 clones with MK42 beds

3D Modelling, Slicing, Hosts and Management
User avatar
MaxRink
Posts: 40
Joined: Thu Jun 15, 2017 12:25 pm

Re: Prusa firmware for RAMPS Prusa i3 clones with MK42 beds

Post by MaxRink » Fri Dec 15, 2017 7:29 pm

@slippy4r Have you looked at the new FW for the MK3? In theory it shouldnt be that hard to adapt it to a RAMPS running TMC2130s. THe only thing that most likely wont work is the power shutdown (but even that might be possible as the power panic as a rather cheap board to make and if you run dual PSUs anyway the hold time might be high enough)

User avatar
Moorviper
Posts: 232
Joined: Wed May 24, 2017 1:19 pm
Location: Hessen/Rhön - Germany
Contact:

Re: Prusa firmware for RAMPS Prusa i3 clones with MK42 beds

Post by Moorviper » Sat Dec 16, 2017 1:53 am

https://de.aliexpress.com/item/Reprap-P ... eLevelAB=0

das mk42 gibts nun im set mit einem rambo mini via aliexpress

slippyr4
Posts: 224
Joined: Thu Jun 15, 2017 10:24 am

Re: Prusa firmware for RAMPS Prusa i3 clones with MK42 beds

Post by slippyr4 » Sat Dec 16, 2017 8:47 am

MaxRink wrote:
Fri Dec 15, 2017 7:29 pm
@slippy4r Have you looked at the new FW for the MK3? In theory it shouldnt be that hard to adapt it to a RAMPS running TMC2130s. THe only thing that most likely wont work is the power shutdown (but even that might be possible as the power panic as a rather cheap board to make and if you run dual PSUs anyway the hold time might be high enough)
I’ve not had time to look yet. The biggest issue is that the MK3 configures the drivers over SPI, on the TMC2130 polulu style stepsticks MOSI,MISO and CS are brought out on the pins usually used for micro-stepping. These go to the microstepping jumpers; a cable would need to be made to link all of the pins together and connect them to the SPI port on the Arduino, which is fiddly. Also, I haven’t bought any TMC2130 for myself yet, I will probably order some soon though.

I think that in the short term, the Mk 2.5 is the way to go.
Self-built Prusa i3 MK2 clone
My things: https://www.thingiverse.com/slippyr4/designs
My Prusa firmware port for ramps & MKS : https://github.com/slippyr4/Prusa-Firmware

slippyr4
Posts: 224
Joined: Thu Jun 15, 2017 10:24 am

Re: Prusa firmware for RAMPS Prusa i3 clones with MK42 beds

Post by slippyr4 » Sat Dec 16, 2017 8:48 am

Moorviper wrote:
Sat Dec 16, 2017 1:53 am
https://de.aliexpress.com/item/Reprap-P ... eLevelAB=0

das mk42 gibts nun im set mit einem rambo mini via aliexpress
This MK42 is aluminium and won’t work properly for auto calibration and skew detection. I think it would be better to buy orballo bed and an MKS board, for about the same money.
Self-built Prusa i3 MK2 clone
My things: https://www.thingiverse.com/slippyr4/designs
My Prusa firmware port for ramps & MKS : https://github.com/slippyr4/Prusa-Firmware

User avatar
MaxRink
Posts: 40
Joined: Thu Jun 15, 2017 12:25 pm

Re: Prusa firmware for RAMPS Prusa i3 clones with MK42 beds

Post by MaxRink » Sat Dec 16, 2017 5:16 pm

slippyr4 wrote:
Sat Dec 16, 2017 8:47 am
MaxRink wrote:
Fri Dec 15, 2017 7:29 pm
@slippy4r Have you looked at the new FW for the MK3? In theory it shouldnt be that hard to adapt it to a RAMPS running TMC2130s. THe only thing that most likely wont work is the power shutdown (but even that might be possible as the power panic as a rather cheap board to make and if you run dual PSUs anyway the hold time might be high enough)
I’ve not had time to look yet. The biggest issue is that the MK3 configures the drivers over SPI, on the TMC2130 polulu style stepsticks MOSI,MISO and CS are brought out on the pins usually used for micro-stepping. These go to the microstepping jumpers; a cable would need to be made to link all of the pins together and connect them to the SPI port on the Arduino, which is fiddly. Also, I haven’t bought any TMC2130 for myself yet, I will probably order some soon though.
Its not that complicated. https://hackaday.com/2016/09/30/3d-prin ... the-gears/

I think that in the short term, the Mk 2.5 is the way to go.
Well ive at leasst preordered the MK2.5 upgrade kit bc. its fairly priced for the bed and the bindtech gears.

slippyr4
Posts: 224
Joined: Thu Jun 15, 2017 10:24 am

Re: Prusa firmware for RAMPS Prusa i3 clones with MK42 beds

Post by slippyr4 » Sat Dec 16, 2017 7:07 pm

That looks sensible, putting the pins on upside down so you can get to the SPI connections. Ones on aliexpress look like they come with pins presoldered which is a bit tedious.

I'll order some then look into it.
Self-built Prusa i3 MK2 clone
My things: https://www.thingiverse.com/slippyr4/designs
My Prusa firmware port for ramps & MKS : https://github.com/slippyr4/Prusa-Firmware

User avatar
MaxRink
Posts: 40
Joined: Thu Jun 15, 2017 12:25 pm

Re: Prusa firmware for RAMPS Prusa i3 clones with MK42 beds

Post by MaxRink » Sat Dec 16, 2017 7:14 pm

slippyr4 wrote:
Sat Dec 16, 2017 7:07 pm
That looks sensible, putting the pins on upside down so you can get to the SPI connections. Ones on aliexpress look like they come with pins presoldered which is a bit tedious.

I'll order some then look into it.
http://www.watterott.com/de/SilentStepStick-TMC2130
The ones on aliexpress are not that much cheaper in this case.

slippyr4
Posts: 224
Joined: Thu Jun 15, 2017 10:24 am

Re: Prusa firmware for RAMPS Prusa i3 clones with MK42 beds

Post by slippyr4 » Sat Dec 16, 2017 7:18 pm

Just glancing through the MK3 branch on prusa github now. It looks nice in that they have split the pin definitions back into separate files (like in Marlin) and they are switched in based on the selected board. That makes it (slightly) easier to add RAMPS support, but perhaps more interestingly it makes it look like the probably intend to merge MK3 into their main branch and have it be a one universal firmware.

That would be good for a few reasons; less to maintain, but it means that availability of specific features is probably going to be pretty easy to enable and disable. I'll keep investigating.
Self-built Prusa i3 MK2 clone
My things: https://www.thingiverse.com/slippyr4/designs
My Prusa firmware port for ramps & MKS : https://github.com/slippyr4/Prusa-Firmware

bartijanos
Posts: 3
Joined: Fri Dec 08, 2017 8:49 am

Re: Prusa firmware for RAMPS Prusa i3 clones with MK42 beds

Post by bartijanos » Mon Dec 18, 2017 12:45 pm

Hello guys!

Anyone here managed to get work MMU with MKS GEN 1.4?, from schematics i found mmu uses VCC,TX2,RX2,GND pins, these pins can be found on mks board too, named J15 Header 1x4pin (WIFI) the only thing here is the order of pins, and i guess VCC is 5v also, in firmware side there is defined E_MUX2_PIN 84, but this pin is unused on both boards by schematics, can someone clarify this? Thanks!.
Attachments
71YcowkuWOL._SL1000_.jpeg
71YcowkuWOL._SL1000_.jpeg (186.38 KiB) Viewed 1840 times

slippyr4
Posts: 224
Joined: Thu Jun 15, 2017 10:24 am

Re: Prusa firmware for RAMPS Prusa i3 clones with MK42 beds

Post by slippyr4 » Mon Dec 18, 2017 12:47 pm

where are the mmu multiplexer schematics?
Self-built Prusa i3 MK2 clone
My things: https://www.thingiverse.com/slippyr4/designs
My Prusa firmware port for ramps & MKS : https://github.com/slippyr4/Prusa-Firmware

Post Reply

Who is online

Users browsing this forum: No registered users and 3 guests