Rods "Spaceship" Scratch built Plasma Cutter build

Looking forward to seeing the results Rod!

My Leadshine drives can take AC input voltage. I did not think to use a torodial without a rectifier to get the 70VAC. Pretty clever stuff.

thefabricator03 wrote: Looking forward to seeing the results Rod!

My Leadshine drives can take AC input voltage. I did not think to use a torodial without a rectifier to get the 70VAC. Pretty clever stuff.

Yeh, that was Ron's idea! You may need to check out how good their internal rectification is if you went that way.

Now I think I need another Lam drive. I can't really leave a crappy $40 ebay drive in there for the Z axis beside them can I?

Would compromise the build quality for sure. We need to see that z axis humming along as well!

thefabricator03 wrote: Would compromise the build quality for sure. We need to see that z axis humming along as well!

No need to hum, its got plasmac helping it out so it only needs a leisurely stroll. The model says it needs a NEMA 34 which is actually 1 kg lighter than the closest NEMA23! But that was to cut corrugated iron at 6100 mm/sec. 20 m/min on a 5mm pitch ball screw.

I know Ron has a LS1073A in stock which is an open frame one which would actually be perfect but a DS1073 would look sexier!

rodw wrote: Now I think I need another Lam drive. I can't really leave a crappy $40 ebay drive in there for the Z axis beside them can I?

I have one such setup, for now, using a Leadshine 742 drive for Z !
Well, having completely silent stepper motors is one of the benefits, not that it matters much while the plasma is on.
Just some heads up:
Current settings, if the motor can do 3A, set them at 2A or max 2.5 as they will overheat,
Common ground inputs can work with much shorter pulse time, 2000 is very reliable, while common + needs at least 3500,
If and when you want to use boost feature, you have to invert the boost pin, as default they will lower the current when boost is on,
-
At 55m/m i tested the machines i am building, the motors were spinning at over 3500RPM, at nearly 700RPM i was jumping on and off the gantry while "surfing the gantry" and they never lost position. For a stepper system that is damn near impossible, especially using Nema 23 short motors rated at 2.4A driven at 2A !

Thanks Tommy. Ron also suggested to start low too.

What I recommend you test
The DS1076AS22 ( ac /dc driver capable) with high speed inputs)
This driver can operate on AC from 20 to 65VAC
Start testing the following setup first
You could be surprised with the amount of torque especially with ball screws..
Try the toroidal taro wired for 30VAC ( put windings in Parallel)
This would give you approx 50VDC internal inside the drive and set the current to the motor at about 4Amps or so
See what the torque is and how it handles the load ( you even have 2amps up your sleeve so you can increase the AMPS
a bit more if needed ..( always good to have some margin build in)

If the above is showing you are really not getting enough power/torque than wire the toroidal transformer for 60VAC
( windings in series at 60VAC and 5Amp (300Va)
Set the current in the DS1076A to 3 or 4 Amp start low and see the performance ...

The above procedure is what I recommend just to make sure all is kosher as they say