What dc voltage to use on rutex R90H drive

[BOB F]

The existing power supply of my 1980 Kasuga cnc milling machine is 100 volt dc. It is servo driven(West amp drive). What would be the recommended Voltage if R990H is used.

[Torsten]

I believe 100 volt at 20 amps is the limit for this drive.

[BOB F]

So does this mean there will be no problem with drive faulting due to motor deceleration even if my power supply voltage is 100 vdc. Thanks for the help.

[Al_The_Man]

Are you just replacing the drives or both control and drives? As the Westamps are usually analogue +-10vdc , the Rutex are I believe step and direction only.
Al

[rutexus]

Gentlemen,

As far as your Kasuga mill is concerned, you may find that 90 vdc will give you sufficient speed. I would bet on it. Otherwise, you might need to consider the R90H drive.

Tom Eldredge,
Rutex, LLC

[Bob fran]

Yes, both drives and control will be replaced. Using another tap on the transformer power supply yielded 94 vdc, so I'll go ahead use R990H.

[BOB F]

I have now the R90H drives. Decided on the 200 volt/40 amp drives because according to the people who knows running R990H on over 90 vdc have only 10% margin of getting ruined from overvoltage.
Also have the E2 single-ended encoders, ttl or open collector type from USdigital.
I've read somewhere along this Forum that such type of encoder will have problem with noise especially in industrial environment. Is this true?

[InsaneEPP]

Bob, yes it is very true. Don't even waste your time wiring up single ended encoders. Do it right the first time and you'll save a lot of frustration.

[BOB F]

Thanks I----EPP,
I waited for your confirmation, now I hope USdigital will accept these for return.

[ynneb]

Yep I made the mistake of using single ended encoders. Now my Rutex cards have to ride along with the gantry. In some ways it is better because you dont have to run control wires along the power chain. However it is a bit messey having the cards on the ganty.
Rutex has a product that will alow you to use single end encoders with longer lenths of cable.

[InsaneEPP]

Bob,

If they don't want to take them back just order the PC45 (http://www.usdigital.com/products/pc45/) It plugs directly into the E2 encoder and gives you differential output.

Andreas

[Bob fran]

Thank you guys, Without your valuable help I would have gone nuts this time. Rutex drive cards riding on the Gantry is funny and clever. By the way, does the PC45 meant PC4 or PC5 cable driver that convert single ended output to differential output?

Bob F.