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Difference between revisions of "TAZ 4"
add information about firmware and digipot current controls
(add information about firmware and digipot current controls) |
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Sudoroom has a TAZ 4 3d printer, that was donated in 2022. It should not be confused with the older TAZ 3 3d printer, which didn't work very well as a 3D printer. | Sudoroom has a TAZ 4 3d printer, that was donated in 2022. It should not be confused with the older [[TAZ|TAZ 3]] 3d printer, which didn't work very well as a 3D printer. | ||
[https://download.lulzbot.com/TAZ/4.0/ Documentation for the TAZ 4 from Lulzbot corporation] | [https://download.lulzbot.com/TAZ/4.0/ Documentation for the TAZ 4 from Lulzbot corporation] | ||
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The original 14-pin "Extruder 0" connector on the TAZ4 was removed from "Aux Power Mosfet Output" (pins 5/red,6/black), E0 Heat (pins 12,13), E0 Fan (9/black,10/red) and Ground (pin 2), and E0 (3,7,11,14). The extruder harness from the TAZ3 was installed in it. | The original 14-pin "Extruder 0" connector on the TAZ4 was removed from "Aux Power Mosfet Output" (pins 5/red,6/black), E0 Heat (pins 12,13), E0 Fan (9/black,10/red) and Ground (pin 2), and E0 (3,7,11,14). The extruder harness from the TAZ3 was installed in it. | ||
The TAZ 4 didn't work because Fuse F3 on the RAMBO main board | The TAZ 4 didn't work because both Fuse F2 and F3 on the RAMBO main board were missing. They're supposed to be [https://www.littelfuse.com/products/fuse-blocks-fuseholders-and-fuse-accessories/fuse-blocks/154.aspx Littelfuse OMNI-BLOK 154 series] and we didn't have any, so I stuck 5-amp [https://www.digikey.com/en/products/detail/littelfuse-inc/0466005-NR/521341 F1460CT-ND] in there since we have dozens of them in the FUSES bin: [[Image:Taz4_fuse_kludge.jpg|thumb|left]] | ||
And now it turns on and the | And now it turns on and mostly works, but the extruder stepper is mostly skipping. Most likely the current needs to be adjusted for the extruder stepper driver, which is something we have to read the manuals to figure out how to do - there are no tiny potentiometers to adjust on this RAMBO board, only a "digipot". | ||
The digipots are controlled with the [https://marlinfw.org/docs/gcode/M907.html M907 command] | |||
The following start code should be entered until we can recompile the [https://download.lulzbot.com/TAZ/4.0/software/current/firmware/Marlin/ firmware] | |||
<code>M907 E150</code> | |||
the default values are found in | |||
<code>Configuration_adv.h:#define DIGIPOT_MOTOR_CURRENT {175,175,240,135,135} // Values 0-255 (RAMBO 135 = ~0.75A, 185 = ~1A) | |||
pins.h:#define DIGIPOT_CHANNELS {4,5,3,0,1} // X Y Z E0 E1 digipot channels to stepper driver mapping</code> | |||