On 03/01/2021 11:02 AM, Feral Engineer wrote:
Hi Jon
No encoders. Besides the 7i76e and raspberry pi, the machine is using the
original steppers and electronics.
OK, without encoders, then you are limited by the servo
period. So, figure some way to tie
the sensor in with the mechanical switch, and make the home
move slow enough so you are doing less than 1000
steps/second. Previous messages mentioned some schemes to
tie the sensor in with the switch. The idea is that
LinuxCNC will make a fast approach until the and of the
sensor and switch show true at HOME_SEARCH_VEL, then back
off and approach slowly until they show true again at
HOME_LATCH_VEL, and that is the home position.
Jon
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