PSU for K 5042 driver

[dmiller47591]

I am on my first build and am ready to buy the motors and drivers. The Keling packages were ok, but I wanted the components to be matched alittle more closely than the 425 oz in motors running on a 36VDC PSU with a driver that has a max Voltage of 40VDC (KL 4030). Seems like alot of waisted potential for that motor (6.8 mH coils i think). So I've opted to go with the 387 oz inch motors from Keling. The inductance is lower and the max optimum voltage is almost 65 VDC. Well, I don't want to buy big expensive drives (4 axis, slaved x), so i probably won't get as high as 60VDC. The 5042 driver seems to be a good one. It is labled as a "hybrid" stepper driver, its got a 3.31 A setting to match my motor's 3.5 A max peak, and the voltage is rated alittle (but not much) higher at 50V.

The question is, does it seem safe to use a 48VDC PSU with these 5042s?? I don't want to be frying drives. If the motors get to hot with the 48V @ 3.31A, I could just set the current alittle lower out of the drive right?

Any advice would be much appreciated.


--As a footnote, I know the G540s kick a$$, but i don't think I can do the
10x microstepping do to my single start screws and the pulse rate that would have to be acheived for any kind of speed.

[dmiller47591]

Ok I'm bumping this because my 48v switching PSU is in the mail, and I don't want anything to go up in smoke once it gets here.

1. I don't know how much I can adjust the switching PSU down, or how much I SHOULD for the 50V max drivers. Help??

2. I just read something about the motors becoming a voltage source at slow down (fast decel from high speed), and that the switching psu has no way to absorb the extra emf like an unregulated linear PSU would. So its up to my drivers to absorb this emf from slow down. Is this a worry? Is there a fix? Are there some safe accelleration and velocity settings that can prevent or slow this effect?

Help, Please?


Darren