As Nicholas just stated, accuracy is not important any more. That is the beauty of electronic adjustment. It frankly does not matter where the switch is, as long as the repeatability is good. Then you just tell the electronics where there is...
It will be different for each one you build, but the calibration routine can be included to calibrate the positions.
In Morgan I have to calibrate two positions: Theta 0 deg, and Psi 90 deg to Theta. It is done with a couple of gcode commands in pronterface, a small LED torch and a set square.
I imagine that "Simpson" would need 6 steps, two of each of the arms, but this is very quick to do if you have a clear set of instructions, and because it is keyed to the hardware of the bot itself, belt or shaft slip over time would not influence calibration in the slightest.
Cheers,
Quentin
It will be different for each one you build, but the calibration routine can be included to calibrate the positions.
In Morgan I have to calibrate two positions: Theta 0 deg, and Psi 90 deg to Theta. It is done with a couple of gcode commands in pronterface, a small LED torch and a set square.
I imagine that "Simpson" would need 6 steps, two of each of the arms, but this is very quick to do if you have a clear set of instructions, and because it is keyed to the hardware of the bot itself, belt or shaft slip over time would not influence calibration in the slightest.
Cheers,
Quentin