There are some experimental preconfigured firmwares being produced for SKR1.3 by this effort:
The nightly builds are collecting here.
These are configured for DRV8825-s so you’d have to change the drivers in the configuration and recompile.
After posting in another thread I decided to just order the actual Rambo board. The shop is sold out so I had to go elsewhere but at least I know I can easily install Ryan’s firmware on it and be good to go. I have it running on the skr now but I don’t think it’s right so want to go with something known good and take that problem out of the equation
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I hate that you are having all these trouble but it speaks to your dedication man!
Is it true you have a MKS Gen 1.4? As far as I can tell it is equivalent to MKS Gen L, which is what I use. And that in turn is nearly identical to RAMPS (not Rambo) but with layout on one board instead of two stacked boards like a true RAMPS (and it would seem better reliability).
You should be able to start with ryan’s software, change the motherboard in configuration.h and get very close.
I would recommend some JST-XH pigtails spliced on to your motor connectors. The dupont connectors sorta fit on the MKS Gen 1.4 (or Gen L) but they easily fall out or make a bad connection. It’s extra work but worth it.
Thanks! the cnc runs but i feel it should be much better than it is. from videos and post i have seen mine is not putting near the quality as it should. ill get it there just a lot of learning to do along the way.
This is the board i have at home:
And these drivers:
i thought this was equivalent to the same board that Ryan sells just with separate drivers. and i have seen that driver number thrown out several times on the forums so i thought i was choosing right. i was trying to avoid the +$100 board option but i want something that’s going to work right so i can take that problem out of the loop and start fixing the rest one at a time.
i feel like from the way the cnc moves just trying to move it on its own that the firmware im running on the SKR board just isn’t right. Trying to figure that out was going to give me a brain tumor so i decided to take that out of the loop and try something more widely supported until i learn more about it all.
TMC2208 can work but they have more features and more things can go wrong. Since they are cheap I would say buy some DRV8825 or A4988. Install the jumpers on the MKS Gen V1.4 and make sure the motor drivers are facing the right way. Use Ryan’s latest 418 for Rambo and change one line: search for “MOTHERBOARD” in configuration.h and change to reflect your board. Flash, and you should be done, or maybe a small change like steps per mm or something we can debug fairly easily from there.
Thanks! ill search on amazon and get a set coming.
Did you mean ramps?
Actually I did mean rambo (and then modify it) because the later releases are targeting rambo primarily. https://github.com/Allted/Marlin/releases
But an older release for ramps is probably easier overall, like this one: https://github.com/Allted/Marlin/releases/tag/412_cnc_ramps
Both will work. I know for a fact that the rambo version with just motherboard changed will work on ramps because thats what I use. Then steps per mm we can solve after it’s up and running.
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Of course, once CI is up and running, this won’t be an issue… 