Build Thread - Emco 320

[Chaz]

OK, looking at Balluff's website (the part number is BES 516-324-EX-X-3), I can see here https://publications.balluff.com/pdfeng ... 403&con=en that a similar device does have a symbol which looks like the image I have above. So that's at least 1 proximity. Oddly my manual has a 2nd page, showing 2 but the page was glued before (ie, perhaps its an option)?

[Chaz]

Also, in this diagram, what is the item in the Red? I think I've seen on other retrofits where there is some form of current comparator and if it sees a load of sorts, it knows the ATC is 'parked'. Could this be it?

[tblough]

Also, in this diagram, what is the item in the Red?

It looks like it's connected to a switch in the motor, so my guess is thermal overload protection, and that symbol is an signal isolator connected to a fault circuit.

[Chaz]

On the 4 bit diagram (and its not in the photo) there is reference to 5 being 'strobe'. I only see 6, so that might be an output, not an input, not sure. Strobe could be an proximity output?

[Chaz]

Also, in this diagram, what is the item in the Red?

It looks like it's connected to a switch in the motor, so my guess is thermal overload protection, and that symbol is an isolation relay connected to a fault circuit.

Thanks. I thought thermal initially too but wasnt sure since it has a feed from the power above, but looking further down, it looks like a relay which then probably faults out the system.

[Chaz]

OK. On the indexing control page, the German shows S7 on one page and S7 and S8 on the 2nd page. Oddly in English they have ommitted the S7 and S8. This confirms that they are proximity sensors.

I dont have the wire 30, which means that I only have S7. That assumes that it just has a timer for the reversal and doesnt wait for a sensor.

[Chaz]

Found this French doc. Has amazing info about timings etc as well as some wiring info / numbers. Will see if I can understand what I need from this.

https://www.usinages.com/attachments/0- ... df.814252/

[Chaz]

Some progress. 33 is the Solenoid S7. But, im getting no change in state from the encoder.

I did some checks, nothing worked but then I tried to measure it instead of relying on the LED / State changing. It's going from 21.3 to 18.1V as I rotate. So likely hall effect, perhaps I needs some resistors? I cant find any documentation on this encoder online, nothing that shows any info.

[Chaz]

I've spent a chunk of time try to get the states to change.

I've put 24V onto the supply which I believe is correct as this is how it was wired on the existing machine. I've also tried with 5V and no power supplied at all.

Tried some resistors, tried Earthing in a few places to pull up / down as needed. I believe this is a PNP encoder but no spec to check.

Even on the strobe out, which I can get 0V and 6V out of pending if its high or low, doesnt change any input. Interestingly when I measure when its connected, its over 13V. Am I chasing my tail here as I run with both Acorn and a standalone 24V supply that are connected together?

Please see below. I can get anything between 13 and 22V on the 4 different outputs and on the strobe output, depending if its got power or not, I can get it to do 0V and 6V when it changes state. Doesnt matter what I do, I cant get Centroid's input to change state.

It 'feels' like I need to connect something else to pull it up or down but no idea, nothing I've done has worked. On the Denford Triac, Ive managed to get a 5V sensor to count, but it has an Eth1616 card.

Thanks

[cncsnw]

At a minimum, there needs to be a connection to 0VDC to complete the input circuits.

If the encoder is an active device, or uses proximity sensors, then there would also need to be a connection to +24VDC.