2+2+3 More Plasma builds, double the joy ! 3X2M and 2.5X1.5M cnc plasma build.

Ds1044 and DS1076, mostly.
I have no words to describe how good they are, but pricey !!!
mechapro.de had a discount on those two models last time i ordered 7 of them.
www.mechapro.de/shop/Schrittmotor-Steuer...ehaeuse:::22_49.html
Still the lowest price i could find.
-
So the sensors are wired and working, done it's first homing and squaring.... about 200 times !
While i was setting it up it was painfully slow, but after sorting it i raised the speeds, a lot! Makes for a fun thing to watch when 20cm from home, it's like "zip" done.
And just in case you order those, please be sure to order the programmer for them, it's 28 Euro, or you will be stuck at 1A and 2A respectively and at /4 microstepping. Been there done that ! First time i ordered them from an Italian website they never mentioned or suggested i might need that, i was stuck at default for nearly 5 months.

rodw wrote: Awesome tommy. Can you share the lam technologies part numbers? I see 2 different sized boxes. Is one of them a power supply? What voltage are you using for the steppers.?

These are power supplies, bottom thingies, 3 of them, 400W each at 24V, wired in series for 72V to the big drives and 48 for the smal one. 1.2KW of power, add two more and i could use them for plasma cutting at 16.7A !!!

Sorry, forgot to attach the picture, to much math and everything...

Tommy, thanks. I also see that they have steppers listed there with encoders but Lam don't list them on their own site. NOr do they have drivers with encoder inputs I can see. So would you close the feedback in Linuxcnc if You went that way?

I was kinda thinking 4 NEMA 23's at around 260 oz/in 3 amps (say Lams M1233051), DS1076 drivers, 70-80 volts with 5:1 reduction drives on a rack and pinion drives should smash a light (say 30kg) gantry

And probably also do the same with a DS1044 on a 48 v SMPS

What do you think?

Or should I use a Toroidal and Lam's power supply modules?

rodw wrote: Tommy, thanks. I also see that they have steppers listed there with encoders but Lam don't list them on their own site. NOr do they have drivers with encoder inputs I can see. So would you close the feedback in Linuxcnc if You went that way?

From what i have used regarding stepper drives, These are the only ones that would justify putting encoders on motors and closing the loop in Linuxcnc as the have an input that says BOOST !!! That can be used to be activates the instance the step count sent from stepgen does not match the steps from the encoder so it will add more current to the motor giving the motor a better chance at catching up. Be aware that by default that boost pin is reversed, so active high will drop the current, can be changed with the software and the usb programmer for it.
-

rodw wrote: I was kinda thinking 4 NEMA 23's at around 260 oz/in 3 amps (say Lams M1233051), DS1076 drivers, 70-80 volts with 5:1 reduction drives on a rack and pinion drives should smash a light (say 30kg) gantry

And probably also do the same with a DS1044 on a 48 v SMPS

What do you think?

Or should I use a Toroidal and Lam's power supply modules?

That seems all good, and with that reduction it will be also usable as a router for sure. I did try to surf the gantry yesterday at 10m/m for over 10 minutes i was jumping on it, and they never stalled. That is with Nema 23 motors at 1.8A, 1:3 reduction and a 15 tooth 3mm pitch pulley, so 15mm per revolution of the motor, or ideal for plasma cutting.
BTW, Lam do make stepper drives with encoder feedback and there was one type on sale at mechapro.de
www.mechapro.de/shop/Stepper-motor-drive...286.html?language=en
www.mechapro.de/pdf/DDS1_Flyer_EN.pdf
That one is very reasonable considering the quality is very high, i could not kill a DS1044 on purpose even by reversing the power supply or shorting motor wires to anything.

The Z's are coming, the Z's are coming !