taloot wrote: i will make ur life easier,,
u can use 2 encoder input
one for real THC other for capacitacne... normally the capacitance is accurate,, but not very accurate. but for probing its very fast compare to proximity or mechanical switch
even proximity sensor have lag/ (and or motor deacceleration speed... so
ur idea is gr8
solving 2 main issue,, with current system
1st u sense the sheet so u have time to stop the motor. unlike the tip complete touch
2nd u reduce the probing time, and u can protect the torch better as it will retract if its about to hit something
for design u can use my code its works well
and for circuit u need resistors. 2m ohm to 4m ohm depend of the destance of detection u want
and for antenna u need the tip to be 1 pole and the machine is the other
u can use mechanical relay to disconnect the tip while ark is on
in my qtpy i have the feature virtual float switch based on encoder value..
its OVERKILL as float switch even if its dirty
and while machine is rrepositiong .. it will trigger estop if value reach,, ur specifc value ,,,
so very good idea
thankyou taloot.
Now I am going to use laser sensor for two reeasons,
1) those are accurate, IMHO atleast for IHS.
2) we dont have to move z axis for probe.
steps:
z moves rest height
offset applies and sensor comes at plasma position,
lid opens, sensor takes reading, close the lid
offset removes and plasma torch comes at its postion
reading is sent to plasmac
it calculates current work position, applies pierce height
torch starts cutting
I know, not for sure, this is less than 2 second process.
