Wiring an 8 wire Nema to 4 core CY cable to an AM882

[JAZZCNC]

25m/min and it fired fault protect had to try, 1610 ballscrews with cheap ass mounts but am going to buy a set of proper angular ones from BST.

What controller you using and how many volts. Do you have a ratio on that because at 1:1 that's 2500Rpm.!!

[Desertboy]

What controller you using and how many volts. Do you have a ratio on that because at 1:1 that's 2500Rpm.!!

it's 1:1 with couplings, I have 80v PSU self build 1kva and AM882's 1 per Nema which can drive up to 8amp's I believe.

I think the screw whip is just over 2000 rpm for this length so I was surprised it went up to 20m/min.

DDCSV 2.1 I have microsteps set to only 2 at the moment the minimum the AM882's will let you set them from the jumpers.

2*4nm Nema 23's from CNC4you on the bottom axis, 1*3nm on the gantry both fire fault protects when I go over 20m/min but under seem to work but I would never run then that fast lol.

Rest of the machine is not up to the job for sure.

[JAZZCNC]

it's 1:1 with couplings, I have 80v PSU self build 1kva and AM882's 1 per Nema which can drive up to 8amp's I believe.

Your asking for trouble running at the drives Max voltage. You will damage them at some point if your running at high feeds and happen to catch the mains at a peak the back EMF will fry them.!

DDCSV 2.1 I have microsteps set to only 2 at the moment the minimum the AM882's will let you set them from the jumpers.

They will run like a grumpy bear at 2 x turn them up to 8x and they will run much smoother, you'll lose a little torque but will run much nicer.

[Desertboy]

Your asking for trouble running at the drives Max voltage. You will damage them at some point if your running at high feeds and happen to catch the mains at a peak the back EMF will fry them.!




They will run like a grumpy bear at 2 x turn them up to 8x and they will run much smoother, you'll lose a little torque but will run much nicer.

I'll try that in a minute, thanks.

PSU test's at 72v without load ~68v with load with home supply when I try it at work I get 78v without load and around 70v with load, it's a Toroidal transformer.

That really confused me originally but power is far from clean.

When Maplins went bankrupt they were half price so I bought 2 both 1kva.