[Darc]

Thanks for that, I'll give it a try when I get a chance.
But just so I'm clear is this correct (see attached)?
I was guessing that the forward slash meant non inv.????

[Al_The_Man]

The / indicates the complement of the particular channel. i.e. when A is high /A is low.
Can you see which colour encoder wire is connected to what pin of the MS connector socket?
Al.

[Darc]

Al, sorry to ask a dumb question which one is the MS connector?
All of the connectors can be removed enough for me to see the pin numbers/wire colours.
I attached a word document of how I thought it would be wired, going by what you have mentioned I think I'm way off.

Also is my way of thinking correct, in regards to what I need?
servo motor connected directly to the R2020 servo drive which I will connect to a breakout board to make it easier.
So hopefully I won't need the old siemens drive that is currently attached to the motor?

[Al_The_Man]

Darc, The MS connector is the bulkhead connector that the encoder wires are soldered to, if you look in the photo it is marked MS3102.
I think if you supply the wire colours I may be able to identify them from the connections I have.
Al.

[Darc]

Al, I finally got a chance to look at the wiring, I also got someone to double check it for me.
Attached is the wiring coming out of the encoder.

[Al_The_Man]

Well what I have indicates it might be 11µa p/p signal output. I am only going by the Heidenhain manual for wire colour code for each type of encoder, so this is un-confirmed information.
I show green A+
yellow A-
blue B+
red B-
grey I+
pink I-
White 0v
brown +5vdc
Black shield??
The fact that the MS connector is not standard Heidenhain muddys the water a bit.
If I am correct then it requires an op amp for subsequent electronics to square it up.
Al.

[Al_The_Man]

Darc, The connections were right but I found it is TTL
The connections as follows
Heid. Rutex
A=A+______P1
B=B+______P3
C,J,K,=+5V_P4
D=A-______P2
E=B-______P6
F=I+______P8
G=I-______P7
H=SHEILD
N,P,T=0V__P5
R,S=JUMPERED (Rutex n/c)

Al.

[Darc]

Thanks Al, you the man...........
So what exactly is this op amp you mentioned?
What will happen if I wire it without one?

[Al_The_Man]

Fortunately it looks like you don't need it as according to the sheet the ROD320 is TTL (5v level) so you can hook it up direct.
Al.

[Darc]

No seriously you ARE the man...

[Darc]

Hi Al, I want to try wiring this motor shortly.
If I haven't bothered you too much (as if?), I was just going over the motor connection and am still a bit unsure with the motor connection (not the encoder), the 2 orange wires come out of the motor and are connected to the blue wire, and the 2 black wires coming out of the motor are connected to the brown wire.
And there is a small connection as you mentioned, as you can see at the bottom.
BTW if I'm explaining something in child like explainations, that's for me not you.

[Al_The_Man]

the 2 orange wires come out of the motor and are connected to the blue wire, and the 2 black wires coming out of the motor are connected to the brown wire.

The two orange wires are the +ve brush pair for the main armature and the two blacks are the -ve pair. Connect your DC drive output +&- to these (blue and Brown).

And there is a small connection as you mentioned, as you can see at the bottom.

These are probabally the Tach, if you put a dc meter on them and spin the shaft you will see a generated voltage to confirm it.
You can leave these disconnected for torque mode amplifier.
Al.

[Darc]

I just asked a really dumb question, and removed it...........whew that was close.

[Fireflowers]

Hi,
This is a DC permanent magnet motor, I have them on my Beaver cnc mill with Fanuc 6M control. Normally they use 6RB20 Dc chopper feed drives. Also found on older cincinnati cnc lathes and mills.
John.

[Fireflowers]

I am trying to repair my Beaver VC35 after the x axis ran away upon switch on.

I've had both cards repaired, the stack card and the position card but when I got round to refitting them the servo set off again then the fanuc 6m control tripped out with x axis 410 and 401 alarms...
Could it be the servo that is faulty?

The brushes look next to new but oddly the servo seems to be holding voltage after the machine is switched off. (becomes hard to turn by hand)
But..if I diconnect one of the servo power leads it becomes totally free..
Then when I connect up again it becomes hard to turn once more.
The servo is a Siemens 1HU DC permanent magnet 200v
I can't understand why the motor would start without a command from the control side of things...?

I tried swapping both cards with the y axis cards but got the same result.
Then switched on ten minutes later with this same configuration and the motor didn't move, the position card just threw a red diode???? and the motor is only stiff to turn in one direction and not the other...

I am lost!!