endstop

tazla

Hi

got some problem with endstops, due to long cabels and poor shield.

when i homeing the i/o thinks it has hit the switch as fast the stepper starts

so is it possible to work around this

using i/o 7 in and Gnd now on a duet 3 6hc

//sven

tazla

Stephen6309

@tazla How do have them wired? Using the NC connections helps with noise.

tazla

@stephen6309 yes got them as NC but the cable length is about 3m

Stephen6309

@tazla Do you have them set as active high? M119 should only show them as stopped when the endstop is depressed.

My X & Y are NC and are set as:
M574 X1 S1 P"io5.in" ; configure active-high endstop for low end on X via pin io5.in
M574 Y1 S1 P"io6.in" ; configure active-high endstop for low end on Y via pin io6.in

tazla

@stephen6309
; Endstops
M574 X1 S1 P"io7.in" ; configure active-high endstop for low end on X via pin io7.in
M574 Y1 S1 P"io6.in" ; configure active-high endstop for low end on Y via pin io6.in
M574 Z1 S1 P"io8.in" ; configure active-high endstop for low end on Z via pin io8.in

Stephen6309

@tazla Use M119 to make sure the endstops are working as intended. It appears the board thinks you're already at the endstop.

SIam

@stephen6309 have you tried to activate the pull up ?

M574 X1 S1 P"^io7.in" ; configure active-high endstop for low end on X via pin io7.in

tazla

@stephen6309

when the y axis is homeing it moves just 5-6mm stops, and does it in slow speed after and shows up as homed
but if i take a cable an short the connection block . it moves all the way.

thats why i wonder if the ii/o feels the powerrush for the stepper and thinks it is home somehow

tazla

@siam

not yet im a complete newbi on this but will try tomorrow

what does that do exactly?

SIam

@tazla The pull up sets the Input port to a defined voltage

tazla

@siam
do i have to change pins from (io7 in and Gnd ) to use the pull up

SIam

@tazla no

tazla

@siam had to go back to try it but it wasent any change

tazla

@tazla if i would setup 3 relays for endstop switches and just use24v for the them

would that be bad somehow?

tazla

@tazla said in endstop:

@tazla if i would setup 3 relays for endstop switches and just use24v for the them

would that be bad somehow?

i made a 24v circuit to a relay and that worked