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16-02-2015 #10
I've used encoders many times but not in the context of cnc machines. As I understand it, homing works as you suggest, the switch detects the gantry approaching home and tells the system to start counting the encoder pulses to actual home position.
Regarding e-stops, most people would kill the power if an e-stop was activated because it's an emergency situation. If you want the machine to stop you should use a 'Stop' button instead.
Either way if power is left on to the encoder and Mach3 for example then the position should not be lost. If the encoders are absolute as opposed to incremental then they will always know their position even if the power has been off. As I mentioned this is how they work on equipment I've used in the past, maybe wait until a cnc user replies for more appropriate info.Last edited by EddyCurrent; 16-02-2015 at 08:15 PM.
Spelling mistakes are not intentional, I only seem to see them some time after I've posted
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