Hi,
I have a basic RAMPS 1.4 setup with an A4988 driving the Z axis. I have two of these but with slightly smaller motors:
![nema17-Screw-stepper-motor-17HS4401S-M8x8-300MM-with-Copper-nut-lead-8mm-for-3D-printer-Z.jpg_640x640.jpg]( "nema17-Screw-stepper-motor-17HS4401S-M8x8-300MM-with-Copper-nut-lead-8mm-for-3D-printer-Z.jpg_640x640.jpg")
Now I was given a nice piece of tooling plate to make the bed of my printer, 440x440x10mm. But with it's mounting stuff on it weighs a ton (about 8kg?) and the motors can hold it, lower it, but no way they can raise it. What are my options? I am considering to cut off the threaded bar and mount 20T gears to the motors, and mount separate threaded bars on the frame with 60 or 80T gears on them to reduce the torque 3 or 4 times. Since it is only the Z axis and I plan to print 0,2mm layers, I won't loose a lot of time reducing the speed of the Z axis.
Another option I can think of is a thread with less pitch, like normal M8 thread with a bronze nut, but whether that would solve it...
I am open to suggestions!
[EDIT] It's 6,2kg, I just put it on the scales. I am thinking about lead counter weights, pulleys and wires. But that won't be nice and clean. I also have a NEMA 34 motor sitting idle... [/EDIT]
Cheers,
Hugo
I have a basic RAMPS 1.4 setup with an A4988 driving the Z axis. I have two of these but with slightly smaller motors:
Now I was given a nice piece of tooling plate to make the bed of my printer, 440x440x10mm. But with it's mounting stuff on it weighs a ton (about 8kg?) and the motors can hold it, lower it, but no way they can raise it. What are my options? I am considering to cut off the threaded bar and mount 20T gears to the motors, and mount separate threaded bars on the frame with 60 or 80T gears on them to reduce the torque 3 or 4 times. Since it is only the Z axis and I plan to print 0,2mm layers, I won't loose a lot of time reducing the speed of the Z axis.
Another option I can think of is a thread with less pitch, like normal M8 thread with a bronze nut, but whether that would solve it...
I am open to suggestions!
[EDIT] It's 6,2kg, I just put it on the scales. I am thinking about lead counter weights, pulleys and wires. But that won't be nice and clean. I also have a NEMA 34 motor sitting idle... [/EDIT]
Cheers,
Hugo