Can the R2020 drive this motor?

[Jeroenvanderloo]

Hi all,

Im new here, and i have a question.
Last week i bought an old cnc-mill and i want to change the old control.
I Was wondering if the R2020 could drive the motors if i build an encoder onto them. The motor data ive got is in the link below. http://www.bugs.nl/media/album/view....NGMDA0My5KUEc=

The motors have a tacho generator but i havent been able yet to figure out, what it uses to position the motor.

I dont know what the nominal amps will be. I havent been able yet to measure it. Im quite interested in the R2020 controllers cos it would be the cheapest way to upgrade the controls. But i would like to know for sure if they can handle the motor voltage and amps. If not ill have to look for different drivers, and propably motors aswell. So can someone please advice me?

Thank you for your time.

[rutexus]

Sir,

If that serial number plate indicates 140 amps as I think it does, it is too big for the R2020 drive. Could you send some more pictures of your machine and the motors to Tom@rutex.com? I may be able to advise you some.

Tom Eldredge
Rutex LLC

[Jeroenvanderloo]

I think the 140amps is the stall current. But would you ever reach that current?
In the link below are a few pictures from the milling machine. Its an old Maho 700. In the first 2 pictures you can see the motor from the serial number plate.
http://www.bugs.nl/media/album/index...mtqZS8=&page=1

Ill take some more pictures when im home from work, and email them.

[rutexus]

No, I don't think you would ever reach that current. The pictures were pretty dark, but the machine did not look that big to me.

What materials do you plan to machine on it? Will you be working it hard?

Tom Eldredge
Rutex LLC

[Al_The_Man]

They appear to be DC brushed motors, the label indicates 140amps before demagnetization occurs, the normal max current is 14.7a. Max DC 170v.
You do not require a tach with modern drives, so these would not be connected.
Al.

[Jeroenvanderloo]

Thank you all for your advice. I made some more pictures which will be put in the online picture album tonight.

So far i know it means that the peak efficiency is 14.7 Amps. What doesnt say much about how many amps the motor will draw. I understand i wont need the tacho, so ill have to mount some encoders on to them if im right. I still have no idea what else is used in the motors to position it right now. Must be something in combination with the tacho i gues. I cant find much info about it in the documentation that i have.

@Tom:
Im planning on machining 7075 aluminium and normal steel. Maybe in some cases some higher tensile steel. 34 CrNiMo 6. But that will require low cutting speed anyway cos of the hardness.

The spindle mounting is ISO40, with a rotation speed between 50 and 2000rpm. The x,y,z -axis feed range is 0-2000 mm/min. The rapid feed is 2500 mm/min.

I have some of the original Maho documentation. In the data sheets i found that the absorbed power by the motor is around 2,2 kW.

[Al_The_Man]

If there is no encoder or resolver on the motor, there may be one fitted externally to drive shaft or ball screw etc, to close the loop back to the control.
Al.