Motor controller needed...

[MuntyScruntfundle]

Hi there. I have a motor that used to be attached to a milling machine, then it wasn't, then all the bits got lost, now I'd like to reconnect it but I'll have to wire it up again.

I'm perfectly happy with the wiring and logic, but I have no idea how to spec a controller. It's an x feed motor so I assume it's a steeper, it's direct connect to the worm gear and has an integral gearbox.

The only markings on the motor are: ZYT-150. 150W DC-230V 0.9A RPM4000 Class E.

Could someone please suggest a suitable motor driver that would provide variable speed, reverse (although I could wire that) and 1 or 2 limiter lines.

Many thanks.

 

[James]

If it has only 2 power wires or terminals, I suspect it is a permanent magnet dc motor.

 

[MuntyScruntfundle]

3, earth, positive and negative.

 

[James]

Yes, it is a dc motor. If you want to run it forwards and backwards, you need a 4 quadrant dc drive.

 

[MuntyScruntfundle]

Ok, or surely I could just add a switch to reverse the polarity?

Either way, can you recommend a unit? I really have no idea what to look for.

 

[Lucien Nunes]

So this is a simple feed drive with no requirement for rapid starting / stopping / braking / positioning, yes? It just has to run at a moderately constant speed set on the controller? There is no feedback device (tachogenerator or encoder) it just relies on a bit of IR compensation and the motor voltage for speed stability?

 

[James]

I was thinking it was a cnc axis motor on a simple machine, but @Lucien Nunes may have hit the nail on the head and it is Simpley to feed one way or another.

 

[MuntyScruntfundle]

Yeah, I just need a variable speed on x+ and x-, no feedback, loopback, it's as simple as it gets really. Inputs for limit switches would be useful, not absolutely necessary.

 

[pc1966]

We have used the Sprint 4Q drives in a servo application, but they seem only to offer 1Q (basically speed control) and 4Q (both directions, motoring and generating as they brake and regenerate energy). For example a 1Q drive:

340i | Sprint Electric DC Motor Controller, 110 V ac, 230 V ac, 1 Phase, 3.4 A, 180 V dc (@ 230 V ac), 90 V dc (@ 110 V ac) | RS

uk.rs-online.com

The non-isolated version is cheaper, but then your speed control and stop/limit signal MUST BE TREATED AS LIVE. For example:

340 | Sprint Electric DC Motor Controller, 110 V ac, 240 V ac, 1 Phase, 3.4 A, 180 V dc (@ 230 V ac), 90 V dc (@ 110 V ac) | RS

uk.rs-online.com

And if you want four quadrant control:

340XRi | Sprint Electric DC Motor Controller, 110 V ac, 230 V ac, 1 Phase, 3.4 A, 180 V dc (@ 230 V ac), 90 V dc (@ 110 V ac) | RS

uk.rs-online.com

 

[MuntyScruntfundle]

Thanks for getting back to me.

But this seems a bit overkill. This isn't a cnc application, it's an old manual mill, the motor is from the old auto feed which was about as basic as it comes. The multipole switch died and I couldn't find a replacement anywhere that was anywhere near the same. This one switch handled input from the other buttons in the system as well as the limiters. I suppose this (at one point in time) was the cheaper way to handle the inputs.

There has to be a small board somewhere that can achieve this relatively simple task?