Urgh. Techno pain.
I has such high hopes for getting the mechanics for the Ingentis (big Tantillus) working today but instead I have been fixing 3 separate intermediate faults with my Mendelmax and trying to get the new RUMBA board working. The RUMBA is a nice board but the documentation is sparse to say the least. I have just about got it working with marlin apart from some weird Z axis homing behaviour issues I couldn’t fix before I lost the will to continue this evening, meaning the thing isn’t printing overnight as it should be.
So frustrating to have so many shiny new bits for the Ingentis sitting idle because the fucking Mendelmax isn’t providing the printed parts.
Patience my friend! Think all the knowledge you’ll get in fixing your own machine!!!
That stinks, the RUMBA was supposed to be out of the box supported by sprinter Marlin and repeteir according to reprapdiscount web page. But as my $75 smoked vikilcd will agree, do not work on a 3d printer when tired and frustrated. Keep up the good work
I totally feel your pain! I have had my Rumba board since March and have had lots of problems where certain steppers will all of a sudden become hyperactive and move ~4x faster than they should (leads to lots of X crashing and too much plastic extruded).
When you say intermediate faults does that mean that you found bad solder points on your board or is it a different kind of fault? What is weird about the homing? If it happens at the beginning of the print can you just disable the endstop and do it manually or will it weirdly home during the middle of the print?
The RUMBA doesn’t have faults, the faults were all issues with wiring or mechanical on the MM. The RUMBA was a challenge because there is very little documentation out there. I can’t find a comprehensive explanation of what all the jumpers and pins are for, for instance. The reprap wiki page doesn’t help much.
I think the RUMBA was simply designed with experienced users in mind. I haven’t had so much as a hiccup from it when working on a friends i3; the biggest problem was its size. T0,1,2 are thermistor inputs, heat bed/main power inputs are clearly labeled, with HBOUT listed for heat bed out, fans and all extruder heater outputs were clearly labeled… only thing not well silkscreened is the endstop pins, but that’s easy enough to figure out with a multimeter.
Perhaps it was just bad silkscreening on mine. I swapped with RAMBO today and it seems to be working flawlessly. (knocks on wood) I am glad that you had good luck with yours, hopefully the rest are like that too!
@ThantiK
I didn’t have any problems with all that basic stuff. Try finding some detail on how the headers work for the fan outputs or what the jumper settings are for 1/32 microstepping (i did btw but only through forum trawling). It’s not a ‘advanced’ board in any other respect though, in fact, with the screw terminals, integrated arduino, variable input voltage etc I’d say it was a better beginners board than RAMPS, it just has very limited documentation. Were I not overly busy, I’d write something up myself.
@Stephen_Jensen Sadly, no good luck for me either. Mine turns out to be faulty too - that homing issue was in fact the Y driver (once activated) shorting the DIR pin on the Z driver so it will only move downwards when the Y axis is activated. I eventually worked this out by selectively homing pairs of axis. The Y driver will also not de-activate without a hardware reset. I’m printing though at the moment, as i moved the Z cables across to E1 and changed the pins.h in marlin to reflect the change. I’m assuming reprapdiscount will send me a replacement as mine is effectively DOA.