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Einsy Rambo 1.1 Mini 1

Posted: Mon Jun 11, 2018 7:48 am
by beepboopclick
So let's say I were getting an Einsy Rambo to put in my original Mini. What are thoughts on the best way to deal with the firmware for that? I'm not particularly concerned about catching skipping or power loss etc right now, I mostly just want my mini to be quieter. The two most likely scenarios seem to be recompile the mini 1 firmware with options for taking advantage of the quieter trinamic drivers or waiting for the mini 2 firmware and setting the print area to match the mini 1. I haven't looked into the firmware changes necessary for bed leveling, but I expect that taking the Prusa firmware and trying to adapt that to the mini will be the… most difficult path, but the first option may be a close second. Has anyone given this more thought than I have so far?

Re: Einsy Rambo 1.1 Mini 1

Posted: Mon Jun 11, 2018 1:30 pm
by beepboopclick
I found the Marlin Source https://code.alephobjects.com/project/profile/6/ so I'm thinking copy the Hibiscus_Mini2 from https://code.alephobjects.com/diffusion ... _LulzBot.h and make my own with some of the flags turned off (like the LCD ones, for example). Doesn't look so bad, though I'll probably wait until it's a little closer to release to do this.

Re: Einsy Rambo 1.1 Mini 1

Posted: Mon Jun 11, 2018 3:22 pm
by Brent.I
beepboopclick wrote:
Mon Jun 11, 2018 1:30 pm
I'll probably wait until it's a little closer to release to do this.
Marlin 1.1.8.59 is the final version for the Mini 2 Release, units start shipping June 20th!

Re: Einsy Rambo 1.1 Mini 1

Posted: Thu Jun 14, 2018 8:56 am
by beepboopclick
Fantastic, working on it now. Once I figure out where the wires go on the new board and test it out, I put my fork up on github in case anyone else needs it (presuming I don't accidentally set my printer on fire or anything).

Re: Einsy Rambo 1.1 Mini 1

Posted: Thu Jun 14, 2018 10:56 am
by beepboopclick
First major problem: fan connectors are different between the boards (so far everything's been either the right connector or gone connectorless into screw terminals. Hmmm.

Re: Einsy Rambo 1.1 Mini 1

Posted: Thu Jun 14, 2018 11:13 am
by beepboopclick
The endstops are also different (no z endstop, which is presumably because of the fancy new board not needing it) and also they have different connectors. My wiring diagram from the sales page for the mini rambo also doesn't label the endstops, and has something hooked up to what's called exp 2 which I presume is actually Fan2 if I remember correctly, so I'm going to have to dig up some better documentation there. Still, fairly close, if also some days away depending on how quickly I can find and get the connectors.

Re: Einsy Rambo 1.1 Mini 1

Posted: Thu Jun 14, 2018 11:21 am
by beepboopclick
And now that it's going to be some time before my mini is working, I'm wondering if the RepRapDiscount LCD screen will generally work with the conditionals set up for the mini2. https://ultimachine.com/collections/ele ... apdiscount Probably best to wait on that one and not make too many changes at once. Nnnnooo, perusing the firmware, it looks like it'll have its own driver and settings.

Re: Einsy Rambo 1.1 Mini 1

Posted: Fri Jun 15, 2018 2:35 pm
by beepboopclick
I have found my biggest failing, which is that the Mini2 is using a new board, the Einsy Retro, which has things like z-endstop switches and 24v fan power supplies. So I'll probably have to dial this back a bit and, if I move forward, move the discussion into a hardware board.

Re: Einsy Rambo 1.1 Mini 1

Posted: Sun Aug 12, 2018 3:52 am
by Kauppinen
I just did this conversion. The endstops are not an issue. The fans (ie fan1 and fan2 have to be changed to molex 3pin with clip to have a good connection). The 5v hotend cooling fan can be powered via exp3 port pins 2&4. The firmware can be hacked to include the necessary options as a update to mini's config. To achieve the end result took me about 3h in total all included. I assume that with instructions and preconfigured firmware this mod would take around 0.5h. The end result is heavenly quietness :3

Re: Einsy Rambo 1.1 Mini 1

Posted: Tue Sep 25, 2018 2:18 pm
by fyodor
Hi Kauppinen,
I had Lulzbot Mini for about year and a half at home and recently had experience using Mini 2 at work. I have to admit it's like night and day! It is so much quieter!!! Now I can't let go the idea of converting my version to make it quieter. ;)
Would you be able to share your conversion process, or at least refer me to some sources of documentation? I'm OK with keeping old z-axis mechanics to keep the changes minimal. What else except the new RAMBO do I need?
Kauppinen wrote:
Sun Aug 12, 2018 3:52 am
I just did this conversion. The endstops are not an issue. The fans (ie fan1 and fan2 have to be changed to molex 3pin with clip to have a good connection). The 5v hotend cooling fan can be powered via exp3 port pins 2&4. The firmware can be hacked to include the necessary options as a update to mini's config. To achieve the end result took me about 3h in total all included. I assume that with instructions and preconfigured firmware this mod would take around 0.5h. The end result is heavenly quietness :3