AMPERE HYPERCUBE DRIVERS
AMPERE HYPERCUBE SERIES

That's because I was measuring the distance between the top of the shaft and the frame to see how much flex there was when tightening. BTW, if you've noticed, I left the idler shafts long rather than trimming them down. It was much more tension than I could ever apply with a belt. I even tested with a wire loop in place of the belt to see how much I could tighten the wire before things went wrong. That, and the carbon fiber, made the structures impervious to normal operating belt tension. I did some experimentation though and wound up increasing the thickness of the structures from 5mm to 8mm, adding the bottom bracket to the motor mount, and using a wider spacing between the 2 bearings in the idler bracket.

Early on I did have a wrap around design towards the inside but it was a pain to print and the part that wrapped around made positioning of the idler bracket problematic. Nothing can extend beyond the perimeter of the frame because the frame has to slide inside the outer frame. It's funny, I've received comments on the motor mounts from some non-knowledgeable friends wondering why I needed such beefy mounts just to hold the motor up not realizing that the primary forces are belt tension and rotational torque. I photoshopped a suggestion to use the T-slot as a second snap-in support. Your motor- and idler mount has not the best mounting to fight against belt tension. HyperCube OverKill: It's Alive!Д®dited 2 time(s). Oh, I did make 1 YouTube video at least proving it's alive. Re-assembly and details will start in the next post. There are still things I want to change which is why I did the tear down. The rolling table the assembly it's sitting on always wound up several feet from where it started but as far as I can measure (~1mm), the tool platform always would up exactly where it was supposed to and nothing caught fire. Of course it can't print anything at all but I have run many torture tests that just print in the XY plane including several overnight tests at 20000 mm/min that scared the bejezus out of the cats. Even so, the Smoothie can do the 2 amps but I've been running them at only 1 amp just fine. Although the motors are rated at 2 amps, each only has to do half the work for it's axis.

AMPERE HYPERCUBE DRIVERS

Later, I'll use external TMC drivers but this was a simple way to get running. The logical XY axis outputs are bridged to 2 onboard drivers for now. The moving mass totals out at around 290g, without hotend, etc. This thing is dead quiet and with the motors holding the rail sliders, the tool carriage has not one speck of play in it. The tool platform has 10mm Igus sleeve bearings press fit into 12mm holes. The moving rails are 10mm roll-wrapped carbon fiber.

AMPERE HYPERCUBE SERIES

The stationary rails are Igus Drylin N series rails with overmolded carriages. Each motor (400 steps/rev, 46Ncm torque) drives 1 side of its respective axis. It works and it allows for NO complex belt routing. The interior of this frame measures 450x450mm with a printable 350x350mm area.

All of the parts will be listed as I do the rebuild. Since the XY gantry is where all the 'new' work is, I wanted to make sure it worked by itself before mounting it in a big frame. The intent is for this assembly to drop into the top of the outer frame which would contain the Z axis build platform. I wanted the build to be as modular as I could reasonably make it so changes would be easier.

Ampere hypercube