[Jdubya]

If that's full-stepping and my math is right, looks like that graph ends around 800 RPM. My guess is you've got plenty of torque, especially if you're going to have 2 of those. At 600 RPM, it's around 3Nm of torque, so around 3700N of linear force before drag, figure around 3kN per screw with drag. If you've got 2 steppers/screws, that's 6kN force, so.. plenty for a lightweight router.

I am going to trust you on the math as I can not do it. I am a dumb welder and not a very good one at that. lol. It sounds like I should be ok though, thanks for that. . Thinking about trying to wire it all up on the bench for testing the motors in the morning (not real confident on the configuration) . I can copy what others do on youtube and it works for them so i should be able to make them spin.

[Jdubya]

Anyone familiar with this ebay 6 axis controller? I searched and I see nothing on it here? I attached the .pdf manual but I am a newb. It looks interesting compared to the no name breakout board that my kit came with?

edit: It actually says: "No best but better" lol sold...

This is probably not the right place for this.

[ger21]

If that's full-stepping and my math is right, looks like that graph ends around 800 RPM.

It's half stepping. Not sure how fast the torque falls off after the chart, but 2500pps is 375rpm. With 1605 ballscrews, that's only 75ipm.Painfully slow for a machine this size.

[ger21]

I would avoid all chinese Mach3 controllers. They all have various issues.

[Jdubya]

I would avoid all chinese Mach3 controllers. They all have various issues.

Thanks Ger21, i ordered the eithernet smooth stepper.

"Painfully slow" hmmm not good.

[Jdubya]

It's half stepping. Not sure how fast the torque falls off after the chart, but 2500pps is 375rpm. With 1605 ballscrews, that's only 75ipm.Painfully slow for a machine this size.

Open to any suggestions? 20mm screws and smaller faster motors? I had previously order the nema 23 425oz motor kit but was told they were too small for bigger machines? Not sure what direction to go now?

[ger21]

5mm pitch screws are a really bad choice for a router. I'd recommend 2010 screws. With the motors you have, 2020 or 2525 would be a better choice.

The 425oz motors probably would be under powered, and would also be a bad choice. They also typically have high inductance and suffer from poor performance at higher speeds, or a lack of high speed performance.

I would think that 640 oz motors would be as big as you need with 10mm pitch screws. But it's important to get very low inductance motors, and run them at a high voltage (60-70V).

[Jdubya]

5mm pitch screws are a really bad choice for a router. I'd recommend 2010 screws. With the motors you have, 2020 or 2525 would be a better choice.

The 425oz motors probably would be under powered, and would also be a bad choice. They also typically have high inductance and suffer from poor performance at higher speeds, or a lack of high speed performance.

I would think that 640 oz motors would be as big as you need with 10mm pitch screws. But it's important to get very low inductance motors, and run them at a high voltage (60-70V).

Thank you Sir!

Edit: im looking at 640oz motors. The inductance says 4 and my power supply and drivers seem to match fine . 4 is better than 22 i assume. .

[Jdubya]

So before i purchase, can someone confirm that these motors
https://www.ebay.com/itm/NEMA-34-5-5...EAAOSwFc5Xv-Zu

are a good choice, and that they will work properly with my 350W, 60VDC, 5.9A Power supply and DM860A 7.8A/80VDC/256 Microstep drivers?

Thanks.

Edit, for link

[awerby]

The power supply seems weak for those motors. They want 5.5 amps each, but your PS only supplies 5.9 total. You need to give it enough current so at least two motors (3 is safer, since you might be running Z as well) can run at full power at the same time, which would take 11 amps, or 16.5 for 3. And if you're using two motors to drive the X axis, then you'd want to supply 22 amps (although you could probably get away with a little less). They only need 64 volts at max, so you're OK there, and the drives aren't a problem. I'd say look for a supply rated at 1000 watts or more.

[ger21]

Mt preference would be these motors.
https://www.automationtechnologiesin...8b-dual-shaft/

And maybe this power supply.
PS-10N67 - 1000W 67V Power Supply - AnTek Products Corp

[Jdubya]

The power supply seems weak for those motors. They want 5.5 amps each, but your PS only supplies 5.9 total. You need to give it enough current so at least two motors (3 is safer, since you might be running Z as well) can run at full power at the same time, which would take 11 amps, or 16.5 for 3. And if you're using two motors to drive the X axis, then you'd want to supply 22 amps (although you could probably get away with a little less). They only need 64 volts at max, so you're OK there, and the drives aren't a problem. I'd say look for a supply rated at 1000 watts or more.

I have a seperate power supply and driver for every motor.

[Jdubya]

Mt preference would be these motors.
https://www.automationtechnologiesin...8b-dual-shaft/

And maybe this power supply.
PS-10N67 - 1000W 67V Power Supply - AnTek Products Corp

Its a good price. I am kinda lost on the 8 wire unipolar, bipolar serial and bipolar parallel amps bit as it relates to my on hand power supplies.?

Im in over my head here.

[ger21]

You want to wire them bipolar parallel.

[Jdubya]

You want to wire them bipolar parallel.

Ok, thanks and then my power supplies on hand, would also need to be upgraded to match as i understand it.

[ger21]

No, you're power supplies are fine.

[Jdubya]

No, you're power supplies are fine.

Great! Again, thank you for your help. 2010 Screws are ordered. Will order these tonight. Back on track. Soon ill have enough extra parts to build a second machine.

[Jdubya]

Now im thinking about moving the screws to the outside of the ibeam again, so i can connect my table to the side rails better.

Easy enough i guess. These new 2010 screws may not fit where the 1605's are currently located. Its pretty tight now. Well see.

[Jdubya]

I have an ESS wiring question about this diagram from automation technology. It shows 5v going into the ESS and then out of the terminal board and supplying all 4 drivers with 5v. Is that correct? I have a clean 5v 5a power supply, i was going to run 5) 1 amp fuses to the ESS and the 4 drivers.

8070D driver Box Wiring (4821)
https://www.automationtechnologiesin...oad.php?id=365

[Jdubya]

So... I guess that was a dumb question... I will stick to the diagram. Lol. . I got my power supplies, ESS, drivers mounted in a pc tower. Just about ready to wire it up.

My bk15's and bf15's came in, they are larger than the bf/bk12's of course, so i will be moving them to the outside rail afterall.

The nema 34 640's are in, just waiting on the new 2010 screws now.