Emcoturn 120 lathe retrofit

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10 years 2 months ago #78871 by Todd Zuercher
Why do you think you need to turn the home switches on and off? They are ignored when the machine isn't homing.

But if you must, there is a pin axis.N.homing that is true it that axis is homing (joint.N.homing if you are using master), just connect that to the output that turns them on/off.

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10 years 2 months ago #78877 by LutzTD
Replied by LutzTD on topic Emcoturn 120 lathe retrofit
because on the emco it uses a hall sensor on the screw, so it will pass the activate it on every turn. maybe im crazy but I dont like that signal being sent all the time and I also dont want to have the sensor powered all the time for no reason. I want it to be automatic so its function would be seamless.

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10 years 2 months ago #78880 by LutzTD
Replied by LutzTD on topic Emcoturn 120 lathe retrofit
like this:
Code:
# power x-axis home sensor through output 1 net axis.0.homing => hm2_7i76e.0.7i76.0.0.output-00 # power z-axis home sensor through output 2 net axis.3.homing => hm2_7i76e.0.7i76.0.0.output-01

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10 years 2 months ago #78881 by Todd Zuercher
So it is more like an encoder index pulse. There shouldn't be any problem with it on all the time.

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10 years 2 months ago #78882 by LutzTD
Replied by LutzTD on topic Emcoturn 120 lathe retrofit
for me it is slightly different. the encoder index would give 0 every time. this will give 0, 100mm, 200mm ... and wont know where. I am not an EE, is it better to leave these on all the time? do they fail due to hours on? Would it be better to use the pulse to determine its OK? I just hate having something on when it doesnt need to be on.

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10 years 2 months ago #78885 by cncbasher
your making this into a a far more complex situation that it needs to be , they are meant to be powered all the time , it makes no difference , this also helps with the internals , that is if a fault does occour your advised of it .

if something is switched off then it cannot communicate , your over thinking problems .

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