Nice upgrades. I would imagine the nema 14s are a massive improvement over the original steppers.
How did you mount them. Any pictures?
Last post by Fishbowlkraken -
Keep in mind, while this does allow them to be used by standard controllers, as well as increase their torque, it also changes the pinout to the board, and the motors run the risk of blowing out, which they do, a lot, as someone who spent most of last year working with 28BYJ-48s.
I'm not sure you understand the size of the gears inside the geartrain. The widest of the gear array in a typical 28BYJ-48 is only a few milimeters wide. There's really no practical way to repair the geartrain inside one of these motors, as someone who's tried, several times, on the 1:64 variant.
I have this firmware working on my printer, replaced the main board with a ramps 1.4, mega2560. powersupply is a spare powersupply from my other printer. steppers replaced with nema14 for towers, nema 17 for bowden extruder, and a e3dlite hotend. only a few changes needed for it to work right.
First change is the measurements, one set were backwards, and my measurements had it a little bit off.
// Center-to-center distance of the holes in the diagonal push rods.
#define DELTA_DIAGONAL_ROD 142.5 // mm
// Horizontal offset from middle of printer to smooth rod center.
#define DELTA_SMOOTH_ROD_OFFSET 115.0 // mm
// Horizontal offset of the universal joints on the end effector.
#define DELTA_EFFECTOR_OFFSET 23.5 // mm
// Horizontal offset of the universal joints on the carriages.
#define DELTA_CARRIAGE_OFFSET 15.0 // mm
also, the endstop logic was revered, the printer i have has normal open circuit and triggered close circuit.
// The pullups are needed if you directly connect a mechanical endswitch between the signal and ground pins.
const bool X_MIN_ENDSTOP_INVERTING = true; // set to true to invert the logic of the endstop.
const bool Y_MIN_ENDSTOP_INVERTING = true; // set to true to invert the logic of the endstop.
const bool Z_MIN_ENDSTOP_INVERTING = true; // set to true to invert the logic of the endstop.
const bool X_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of the endstop.
const bool Y_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of the endstop.
const bool Z_MAX_ENDSTOP_INVERTING = true; // set to true to invert the logic of the endstop.
Rest of my adjustments are specific to the other parts of the hardware replaced, i did verify if you mod the included steppers to be bipolar they work just as well as by default if you also swap the pins into the correct order.
You can find my print head fan on thingiverse. It worked well.
I am looking to see if anyone is willing to donate their busted 101hero printer that they have given up on. I am wanting to do more in depth videos on troubleshooting the printer to help out everyone who is having problems. But my printer when assembled works as well as could be expected out of the hardware.
I am willing to discuss paying for shipping of the printer to me.
Am looking for specifically broken printers with various problems.
Why don't people replace/repair the gears inside the gearbox? Are they not sold anywhere?
i dont see why not, as from my testing you can use normal steppers with the default board. i beleive the number of steps to configure for a normal stepper is 80. but someone else might be able to correct me there.
i designed some printable adapters for the nema 14 motors to fit into the normal openings, they are up on thingiverse at the link following.
working on replacing all the electronics in mine now. though using nema 14 steppers instead of the default ones. there is a firmware that shared on the forum here. though i am strugging to get the homing to work right using it.Awesome, that was pretty much the answer. Can you keep us informed?
Also, do you think I could make th the nema 14 motors work with the main controler board with gcode adjustments?
working on replacing all the electronics in mine now. though using nema 14 steppers instead of the default ones. there is a firmware that shared on the forum here. though i am strugging to get the homing to work right using it.
using a RAMPS1.4 with nema 14 steppers for the uprights and a bowden settup with an e3d extruder (probably goign to put in a knock off once it arrives from china)