I did it in a similar way. But you can save a lot by using 5 gears and a ring toothed belt. In addition to the fact that you can adjust the gear ratio using gears with different numbers of teeth, you use only one stepper motor, removing the load from the driver. The main problem with the scheme with four threaded shafts is the need for precise initial adjustment of the kinematics. In the case of four motors, you are guaranteed to catch a wedge due to missing steps on one of the 4 motors.
If you are having issues with inconsistent motor speeds at each corner, you may be able to place at sprocket on each piece of All-thread and run a chain around the whole unit to force cohesion. My robotics team did something similar about 15 years back.
iamkisly
I did it in a similar way. But you can save a lot by using 5 gears and a ring toothed belt. In addition to the fact that you can adjust the gear ratio using gears with different numbers of teeth, you use only one stepper motor, removing the load from the driver. The main problem with the scheme with four threaded shafts is the need for precise initial adjustment of the kinematics. In the case of four motors, you are guaranteed to catch a wedge due to missing steps on one of the 4 motors.
livurz
If you are having issues with inconsistent motor speeds at each corner, you may be able to place at sprocket on each piece of All-thread and run a chain around the whole unit to force cohesion. My robotics team did something similar about 15 years back.
DisasterofPuppets
Cheers. So far everything is going well. Just about to post another update with the speed increased.