Help needed to get my 7i76E + 7i85S + 7i73 on my mill going.

OK, so I need to change the encoder. This a second hand unit that was supposedly working OK.
It is a bit messy to add a proximity sensor but it might be doable sensing the shaft coupling on the encoder.

Are you sure its bad? how have you tested it?

Index is quite short on high resolution encoders so its hard to catch
without using the encoder counter hardware

Hal show
Turning spindle by hand very very slowly where I can clearly see A/B transitions but nothing on Index.

What is the best way to check spindle Index function within LCNC? Any examples to try?

Question

I have a manual switch on my frontpanel and want to be able to run flood coolant manually.

Following in my hal file
# ---coolant signals---
net coolant-mist <= iocontrol.0.coolant-mist
net coolant-flood <= iocontrol.0.coolant-flood

# --- DIN-01 Coolant pump ---
net din-01 <= hm2_7i76e.0.7i73.0.1.input-20

# --- COOLANT-FLOOD ---
net coolant-flood hm2_7i76e.0.7i76.0.0.output-04
net din-01 hm2_7i76e.0.7i76.0.0.output-04

Is this the correct way to net functions wanted?

tecno wrote: Hal show
Turning spindle by hand very very slowly where I can clearly see A/B transitions but nothing on Index.

The definitive way would be to "sets xxx-index-enable true" then rotate the spindle and see if it ever goes false.

The software needs to see index-enable go false to start the tapping cycle, but I don't know if it technically requires that it be in the right place unless you are doing rigid tapping.

You could try an experiment where you start a rigid tapping move (MDI) then manually "sets xxx-index-enable false" when you see it get set to true. It will either work or give a following error, I don't know which. If it gives a following-error then it means that it also requires the counts to be zeroed (another effect of index-enable)

I can imagine generating an index pulse in HAL and sending that to the encoder counter working (just as long as you don't peck-tap)

The definitive way would be to "sets xxx-index-enable true" then rotate the spindle and see if it ever goes false.


Will try this and see what is going on.

Thanks

Sorry No Go so the index pulse is broken.

So I will have to go with inductive sensor but all I have are suited for 24VDC.

How can I safely connect these 3-wire sensors like this one www.ifm.com/products/ind/ds/IE5288.htm
Assuming a serial resistor on pin 4 to pin 13 on TB3?

Is this OK with a divider?



Found another better one that can do 3kHz = PNP NO

Done some testing supplying 4.9VDC and I get out 4.3VDC, any chance this can be reliable up to 3kHz?
Specs say to supply 10-30VDC

If you use NPN proximity switches you can connect them directly to 7i73 inputs as they act as a switch-to-ground.
I have 24V NPN proxes connected to the 7i73 in my Lathe apron.
(Don't try this with PNP though)

Spindle encoder on 7i76e with no Index pulse.

Have only PNP for max 3kHz in my bag of tricks