[EduardKieser]

Hey guys.
I'm looking for appropriate drivers for my steppers.

Motor specs

Part No.: 57BYGH115-003
Frame Size: NEMA23
Step Angle: 1.8 degree
Voltage: 6.3VDC
Current: 3 A/phase
Holding torque: 25Kg-cm 354oz-in
Number of wire leads: 4
Weight: 1.55KG

I have a good quality 24V/15A power supply, but I will replace it if it's necessary.

I'm currently looking at kelling 4030 drivers or at M542 drivers from china.
Any advice on driver current/voltage rating would be great.

[cnczoner]

How about IM483's?

[MrWild]

voltage should be 15-20 times more than the motor voltage. There will be a shortage of power at higher RPMs (rapids) which could cause lost steps. Go with Gecko 203 and 70 volt power supply.

[port_huon]

A good rule of thumb calculation for maximum voltage is:

32 * square root (inductance)

The inductance of your motors is 9mh which would make maximum voltage 96V.
As suggested,, the Gecko 203V is a good fit (max voltage for 203V is 80V)

[EduardKieser]

Does anyone here have experience with 2M542 drivers?

[EduardKieser]

Hey guys thanks for all the input.
I'm afraid 70V gecko's are out of the question for me (finance wise) so the way I see it is as follows:

1. I can go with keling kl-6050 drivers and buy a 60V power supply
2. I can go with a gecko 520 and run it at 48V

I have heard many great things about gecko drives. My question is this: Are the gecko drives so much better that it would be worth it for me to run the motors at 48V or do you think the advantages would me neutralized by the fact that i'll be running the motors below the recommended voltage.

Thanks in advance
Eduard

[Crevice Reamer]

Hi EK.

Running 96V motors with 48V is not an optimum solution. Everything in the driver system must match. Making your current motors work well will be expensive.

Spending money that only gets you marginal performance or worse is not economical, because then you will need to spend MORE money to make it work properly.

You don't say what you are going to run with these motors, but in general, for a N23 system, this is what I recommend:

http://crevicereamer.com/Page__57.html

CR.

[EduardKieser]

Well I can get 3 60V drives for a reasonable price. +-180$ for the set with a bob. According to the gecko website 96V is the Max allowable voltage for these motors. Is 60V really that far of the mark?

[cnczoner]

Depends on what the motors are being used for. Not every machine needs to be run as fast as possible. For similar reasons (cost) as you, I am running motors that are capable of 45-55V, at 34V and very pleased with the performance. If I ever did want to go faster, I could sell my drivers, and pick up something bigger later.

[ger21]

Top speed is proportional to voltage. So 60V will have a top speed approx. 33% lower.

[UUU]

I've just rebuilt a machine that already had a 24V supply, so I wondered if it needed to be bigger for the new motors and drivers. I had been told, as you now have, that the low-speed cutting performance would be fine, but I wouldn't get the full speed that the motors were capable of on rapid traverse.

I bought Geckos and am happy with them.

I could go to 48V, but I'm still running 24V and have no plans to change. It's only a small machine and it's doing everything just fine. My car could go faster, too, but I like to see the world go by.

[rayscott]

Try the stepper motor amps at www.circuitspecialists.com .. They have some great prices. I recommend the CW250 .. http://www.circuitspecialists.com/prod.itml/icOid/8922

The voltages are right ...

Ray Scott