Classic ladder comparator not working on the Schaublin back gear.

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05 Jan 2024 19:39 - 05 Jan 2024 19:43 #289893 by RotarySMP
Hi Guys,
I have a two speed back gear on the Schaublin 125CNC, and want to select high/low with a momentary switch at present.

This latching ladder was working, until I added the comparators. 
 

The problem using only the "spindle on" inhibit, was selecting a gear change with a running spindle cocked the ladder,  and as soon as you commanded the spindle off, the gear change occurred with a still spinning spindle. The gearbox is only supposed to shift when stationary. I added the comparator so that it has to wait till the spindle winds down before shifting gear.
 

I tried %IF0<5 but that didn't work. Then I tried %IF0=0,  but even once the spindle stops and that value stablises to 0, that line wont go active. 
I would appreciate any assistance on what my syntax error is here.
Cheers,
Mark
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Last edit: 05 Jan 2024 19:43 by RotarySMP.

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05 Jan 2024 19:56 #289896 by spumco
Does the pound sign belong in the comparison statement?

Maybe try:
%IF0=0

instead of
#%IF0=0
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05 Jan 2024 21:25 #289905 by RotarySMP
Great spotting thanks. I'll check that tomorrow. The comparator box has a pound sign in it by default. But you are right, the other examples I now see have it removed.
Cheer,
Mark

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06 Jan 2024 10:32 #289947 by RotarySMP
That was it. Thanks. Now it works as expected.
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