Need Help!- Speed Control

[ronateah]

I am in the process of retrofitting a hermes engraver. I removed all the electronics and installed a new stepper control but hit a bit of a hurdle on the speed control on the spindle.

I need a simple Inexpensive means of controling spindle speed. Hind sight is 20/20 and I should hung on to the original spindle speed control but did not. This is a 150 watt single phase brushless motor with an aluminum start capacitor. I think this type of capacitor can stay in the circuit. I can start and run at rate speed with the cap in the circuit and it does not seem to matter on which winding. Motors are not my stong point.

Anyone have any suggestions.

[Juank]

Hola, ron
Yo estoy con el mismo problema, la diferencia es que yo tengo un motor brushed y quiero reemplazarlo por un brushless.
Mi idea para tu problema es que uses un Inverter, (AC speed controller for 3 phases motor) con un transformador trifásico en la salida (3 phases 220v to 1 phase 110v)
Like my idea??????
Si te resulta bien por favor respóndeme.
Suerte....

JuanK
(If you not understand, I translate this for you)

[ronateah]

Juan

Thanks for the reply. Would probably work. But in my case I went to the gabage dug up the old parts managed to get them wired back together, found a broken wire in the process and now it works so it looks like I am back on track. Aniother day and I would have been purchasing a new motor and drive. I had found what looked to be suitable from www.wondermotor.com

Thanks for your thoughts

Ron

[aminear]

What model of controller did you have?

I am in the process of working on an engraver I just acquired. It is a New Hermes vanguard 3400. The EP controller had some problems, the main board is bad, which is just an old 386 pc board with a couple of ISA cards on it. One is a serial port card and the other is a motion controller card. The motherboard is so old the cmos battery has corroded and died, so the CMOS is dead and no way to reload it.

The other parts of the EP controller consist of the motor driver board and the power supply. After much effort I drew up half of the motor driver board on a schematic and figured how to wire my parallel port up to control the stepper motors. I have that working now direct to my computers parallel port running Mach3. I am not sure about the spindle motor though.

Do you know if the motor is variable speed? Any ideas on how to control it with the parallel port?

[ronateah]

Aminear

The controller is a PUIVX90. This is the controller for the stepper motors which I think you are asking.

I have given up on the spindle motor and I am replacing it with a variable speed dc motor. The existing motor was variable and had a control of sorts similar to a dimmer control.

Controling the spindle through the your parralell port can be done typically in one of two ways

straight on/off
PWM

either way will need an interface to connect you parallel port to but there are lots of those available.

[aminear]

Ok,

Thanks for the info.

Arnie