This is one I'll be watching. My next build will be with a fixed gantry and moving platen, and I like the idea of a rising Z axis. I guess you will be running both Z motors to a single port, as you would with the Y axis, so keep an eye on the current demand on your drivers. Please keep us up-to-date with your progress, step by step, as I'm sure many will be checking out your design. Good Job, Gray
Sorry, I didn't see any details on your electrics, but usually the two Y motors are supplied from the same point, with one having its wires reversed because of travel. Likewise, I thought the Z motors would be supplied similarly but without the reversion on the wires. I didn't realise you were set up with individual drivers. Too much reading of control boards with on-board drivers. My bad. Gray
Having separate z motors will introduce unevenness in the level of the gantry unless there is a mechanical bottom stop right?
Yes, once the motors are powered up they will be in sync and wont have any issues but from a standstill no power then u should make sure u have stops on both sides. I have this issue on my Mendelmax 3 printer which has separate motors, nowim designing something to mechanically sync both sides either with a belt and pulley system or connect both screws with pulley/belt. Just my .2cents.
I had the same problem with my spindle, I snapped one off while tightening it. Found 8mm replacements that are much better.
Hope you sort the problem without too much trouble. Now...... I did notice that little technical hitch with the black wiring when I saw the picture, but thought it was just sleeving! You can get little coloured identifying rings which slide onto the cable. Good luck Gray
While wiring can be the reason for your problem it can also be some settings that are too high, like acceleration or motor current, to name a few. Since you have the same problem on all axis' I would have called 'setting' as my first problem.
I know you have probably done this already but, have you tried the tabletop method? Just wire up the control board, the drivers and the motors with little flags on them, on the table, and see what works, and what doesn't.
Can you check how much you are pushing through it? It sounds a bit too hot to me. Is it going nice and smooth and quiet? Check out this video.
I'm sure you did, but, you did reverse one pair of wires for each axis because one motor is going in the opposite direction?? I think you must have or it would have locked up.
Seems pretty solid to me. Do you get any flex at the very top of your towers? Well done. Good job!!! May the chips fly for you!!
I see your point, and I like the idea of the fixed dust shoe. I'd take a look a earth magnets, and the good old door draught excluder brush.
