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andysayle

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  • 3D printer
    Ultimaker Original (+)
    Other 3D printer

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  1. I'll take a look at the Tinker firmware, I've heard of it, but never tried it. I've just done a couple of test prints (after a factory reset), and it seems to be working great. The layer heights are spot on according to my calipers! The only issue I have now, is that at the start of a print, the prime amount seems to not be enough, and the first 10cm or so of print is not happening, until the filament reaches the nozzle...
  2. That's fantastic, thanks for the help @gr5 I've gone through, and done a custom version of the firmware (actually quite easy, even for an Arduino newb like me!). I've mapped the E1 driver pins to be the Z axis Step/Dir/Ena, and also set the "DEFAULT_AXIS_STEPS_PER_UNIT" for the Z axis to now be 400 instead of 200 (it looks like the normal Z axis driver is using 8x µ-stepping, whereas the E1 driver is fixed at 16x µstepping. It's good to hear the current control doesn't need to be adjusted too much. From the code, it looks like the defaul values are 1200 and 1250, so not enough difference to worry about, like you said. Thanks again, I've got some reassembly to do now, before I can test properly, although an initial power up looks like the Z axis is driving correctly now 🙂 Cheers Andy
  3. Afternoon all. I've been doing some refurb on my Ultimaker 2, new bearings, belts, hotend etc. When I have come to use it again, it is coming up with the ER05 and ER06 errors about the Z axis. I've done some digging, and noticed on the main board, the little stepper driver chip associated with the Z axis stepper motor, has got a chunk missing from it. Presumably this is why the Z axis limit is considered to be stuck/broken, as the Z axis cannot move. I have tested the Z axis motor using a standalone driver, and the motor is working perfectly. The motor coil resistance is in spec, and also the limit switch is actually working correctly (using TP80 to check for 5V/0V when switch is used). I have a V2.1.1. mainboard, and it has the hardware for the second extruder. I was wondering if anyone has any compiled a custom firmware, that allows the use of the E2 driver to power the Z axis motor? From what I can tell from the schematics, the only issue I can see, is that the Stepper driver Vref for the second extruder, is shared with the primary extruder, and therefore the Z axis current limit will need to be the same as the Extruder? Thanks Andy
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