Homing / limits - the manual is misleading, possibly wrong

linuxcnc.org/docs/devel/html/config/ini-homing.html

cmorley wrote: linuxcnc.org/docs/devel/html/config/ini-homing.html

Can you check: This example shows minimum and maximum hard limit switches with a separate home switch.
As you have :::: This example shows minimum and maximum hard limit switches with a separate home switch.

For both examples

Thanks for the work you have put in.

ahh yes! Thanks for proof reading.

Chris

cmorley wrote: linuxcnc.org/docs/devel/html/config/ini-homing.html

Chris
re
The two H are the hard limit switches trip points

A<->B is the positive soft limits (MAX_LIMITS) = 10 units

B<->C is the home_offset (HOME_OFFSET) = -0.7 units Should this be a +ve value as used for the gantry square as I feel using -ve would drive back onto the switch. Just a thought!!

B<->D is the negative soft limits (MIN_LIMITS) 0 units

A<->D is the total travel = 10 units

B<->C is the home_offset (HOME_OFFSET) = -0.7 units Should this be a +ve value as used for the gantry square as I feel using -ve would drive back onto the switch. Just a thought!!

If you used +0.7 that would move the Origin to the right (- side) by 1.4 units ( ie .7 units to the right of 'C') and you would hit the negative hard limit switch before the soft limit stopped the axis, then next time you moved to the minimum limit after homing.
keeping in mind if you change the home_offset number you move the 'ruler' in the pic too.

As for gantry homing, I don't think I understand what you are getting at.
But maybe I should make a drawing for gantry homing for reference too...

Chris

Chris,

Under Figure 1,
really should say