Schaublin 125-CNC retrofit.

Hi Tommy,
Thanks for checking in,.
What type of hal sensor?
- Unknown. Whatever Schaublin bought in 1980.

What output does it have?
- It seems to be a DC analog output. In the video, you will see that the output voltage varies on magnetic position (strength), peaking at about 4V on a 5V PSU.
Might need a resistor as pull up or pull down.
- It seems to sit nicely down at about 0.1V when no magnetic field is present. I dont know what to do about a resistor.
Some give variable voltage on the output depending on magnetic field.
- Yes, the output is analog.
Mark

Looks like you are powering the logic of the 7I84 through the jumper W1. If so then that is connected to FieldPower of TB2 which you are supplying with 5V and that is not sufficient according to the manual of the 7i84 (see manual page 7).

Note: When W1 is in the left hand position, VIN is connected to VFIELDB

But you could either switch the I/O Bank or supply logic power separately after removing jumper W1.



Also might want to check that input with a jumper wire from the 5V FieldPower connector to the respective input.

Thanks for spotting that. That is the easiest, and most likely trouble shooting step, so I will try that after the F1 GP is over.

Mark

I am an idiot. It was pointed out that the Mesa manual states that Bank B (TB2) needs at least 8V as it also powers the guts of the card. I checked and had the 24V on that bank, but also had gotten confused and had the Hall sensors on that bank. Once I switched them to TB3, the Mesa card can read them fine.
Mark

Starting to look like a lathe again.

I have a question with respect to wiring pass through encoder signals to the 7i85.

The JMC driver outputs the differential signals from the motor encoder :
 

... and I would like to pass that signal through to LinuxCNC on the 7i85:
 

I am a little uncertain of the GND signal on the JMC driver. As drawn that looks like it is just the cable shield earth. I take it the 7i85 needs the TB3-3 GND reference signal for the encoder right? I cant upload the full manual here, as it exceeds the forum limit.
www.jmc-motor.com/file/1806080392.pdf
Mark
 

Yep.  Six conductors, plus a shield.

I believe the OCZ/GND connection is a bit of a red herring in your case.  Pretty sure that's for a single-ended output; probably used for a home-to-index feature for a controller that can't take differential inputs.

On the other hand, I'm mildly curious what an electric angel is... Incremental encoder Z pulse electric
angel
 

Thanks guys. I wasnt sure if the differential signals were each referenced to gnd or formed a circuit.

Yeah, that manual has some high grade Cringlish