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Using Einsy Rambo at 12V

Posted: Tue Feb 27, 2018 1:04 am
by davidt
Hi everyone,

I have been looking into a new board for my Prusa-like machine. I have seen discussion about using RAMBO mini vs MKS Gen v1.4.

I have previously used MKS Gen v1.2 and MKS SGen boards. I have lost both of these now and I am looking into what options I have.

Has anybody considered using the Einsy Rambo from Ultimachine in their builds now?

My take on it has been having a solid well made board with hard wearing connectors for power, including fuses may just be worth it. Also having TMC2130 fully integrated may save some troubleshooting and time. Though it will cost about $180 AUD to get it here.

I did hear Josef Prusa mention that these boards struggled to provide enough power to the steppers at 12V.


Thanks guys, any advice would be appreciated.

Re: Using Einsy Rambo at 12V

Posted: Wed Feb 28, 2018 2:47 pm
by slippyr4
why not use it at 24v?

Re: Using Einsy Rambo at 12V

Posted: Fri Mar 02, 2018 6:02 pm
by MikeNanninga
davidt wrote:
Tue Feb 27, 2018 1:04 am
Hi everyone,

I have been looking into a new board for my Prusa-like machine. I have seen discussion about using RAMBO mini vs MKS Gen v1.4.

I have previously used MKS Gen v1.2 and MKS SGen boards. I have lost both of these now and I am looking into what options I have.

Has anybody considered using the Einsy Rambo from Ultimachine in their builds now?

My take on it has been having a solid well made board with hard wearing connectors for power, including fuses may just be worth it. Also having TMC2130 fully integrated may save some troubleshooting and time. Though it will cost about $180 AUD to get it here.

I did hear Josef Prusa mention that these boards struggled to provide enough power to the steppers at 12V.


Thanks guys, any advice would be appreciated.
Its true i have one here. Its working on 12v. But i recomend to get the full power of 24v. You only need to change your hotend cartrich and if you have a mk42 clone its supports 24V

Re: Using Einsy Rambo at 12V

Posted: Mon Aug 27, 2018 10:56 am
by davidt
Thank you!

Re: Using Einsy Rambo at 12V

Posted: Mon Aug 27, 2018 2:28 pm
by Moorviper
wow i would not use the mk42 @ 24v it is designed for 12v.
There is a reason why prusa designed 2 versions of the mk52 one 12v and one 24v

Normally the mk42 is in the range of 1.0 to 1.2 Ohms.
At 12V this gives 120W/144W of power. At 24V, this gives 480/576W
This can burn the traces down. and ruin your heatbead.
Also the connectors on the einsy.


DON'T DO IT !!!!

Re: Using Einsy Rambo at 12V

Posted: Mon Aug 27, 2018 8:06 pm
by Markwill
The Orballo Printing mk42 heatbeds https://orballoprinting.com/home/161-mk42.html are fully compatible with 24v. I think the original too. The mk42 heatbed has traces in the back. If you remove the black paint in the pads you can connect both pads (top and back) in serie and you can run 24v!