Wabeco Speed Control

[pv_uk]

I am trying to get the spindle of my Wabeco F1210 mill under Mach3 control. At present the speed is controlled by a 220K pot into the Wabeco controller card which uses a TDA1085C motor control IC. I think the motor is a universal AC/DC type ran on AC like a washing machine motor.
Does anyone do a controller for such a setup that will take a PWM, or even a 1-10V input?

Can I run this motor as a DC motor?

Thanks!

[Al_The_Man]

You can control the TDA1085 with a 0-10v signal between 8 (common) and pin 5, one thing to watch for when hooking into the TDA1085 is that the circuit is usually not isolated from the incoming AC supply, if controlling with an analogue signal of 0 to 10v you should use a variable resistance opto isolator, this type is different from the usual opto in that the output offers a resistance that is dependent on the voltage in.
The motor is a Universal type so it can be run in the DC mode, which is what it is running with the TDA1085.
Al.

[pv_uk]

Thx for info, Al. Actually, before your answer I was convinced the motor was running AC, as live and neutral from the mains switch go right into the motor harness, presumably to the stator windings.
I've even had our washing machine apart to understand what's going on (took some explaining!) - and that too has 6 wires going into the harness. 2 for speed sensor, and a pair each for stator and commutator windings(?)

Is it normal for a universal motor to have permanently energised stator windings, and just vary the power to the commutator? All the texts talk of the stator and commutator windings being in series.

[Al_The_Man]

If the field windings are being controlled separately it really is no longer a series motor, If the field and armature are being controlled separately then it begins to resemble a shunt controlled motor, if the field is fed from the AC supply direct then the armature would have to be Triac fed as the armature and field would have to be kept in phase. I have never heard of that set up for a universal motor before.
Al.