Combine all Home and LImit switches

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07 May 2011 15:59 #9633 by czerech
czerech created the topic: Combine all Home and LImit switches
Hello,

it's my first post on forum so i want to say hello to everyone :)


I was wondering about one thing. Can I combine all limit and homing switches and plug it to one pin?
I know that i can combine all Homing to one pin and all Limit to another pin, but i got only one pin left.


thanks in advance for help, and sorry for my poor english skill ;]

regards
Piotr
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07 May 2011 19:03 #9634 by BigJohnT
BigJohnT replied the topic: Re:Combine all Home and LImit switches
Yes, you can combine all the limits and homing switches to one input. In your homing sequence you MUST home only one axis at a time.

John
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07 May 2011 21:08 #9637 by czerech
czerech replied the topic: Re:Combine all Home and LImit switches
Thanks a lot John

but i have problem with homing. When i add in HAL limit option

"
net all-home => axis.0.home-sw-in
net all-home => axis.0.neg-lim-sw-in
net all-home => axis.0.pos-lim-sw-in

net all-home => axis.2.home-sw-in
net all-home => axis.2.neg-lim-sw-in
net all-home => axis.2.pos-lim-sw-in
"

when im trying to home then when first switch trip, homing proces stops and "joint 2 on limit switch error"

of course i set "HOME_IGNORE_LIMITS = YES" in both axis

any clue, what i'am doing wrong?
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07 May 2011 22:07 - 07 May 2011 22:08 #9642 by BigJohnT
BigJohnT replied the topic: Re:Combine all Home and LImit switches
Are you moving axis 0 off of the home switch as your move to home?

www.linuxcnc.org/docview/html/config_ini...ing-sequence-diagram

John
Last Edit: 07 May 2011 22:08 by BigJohnT.
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08 May 2011 05:03 - 08 May 2011 05:15 #9647 by czerech
czerech replied the topic: Re:Combine all Home and LImit switches
Yes, i'm useing sequence from to first diagram of Your link.

in a second i will paste AXIS section of my INI file and HAL file.

regards,
Piotr

"
net all-home <= parport.0.pin-10-in-not


net all-home => axis.0.home-sw-in
net all-home => axis.0.neg-lim-sw-in
net all-home => axis.0.pos-lim-sw-in

net all-home => axis.2.home-sw-in
net all-home => axis.2.neg-lim-sw-in
net all-home => axis.2.pos-lim-sw-in
"

"
[AXIS_0]
TYPE = LINEAR
HOME = 490.0
MAX_VELOCITY = 85.5008550086
MAX_ACCELERATION = 500.0
STEPGEN_MAXACCEL = 625.0
SCALE = 200.0
FERROR = 1
MIN_FERROR = .25
MIN_LIMIT = -0.001
MAX_LIMIT = 500.0
HOME_OFFSET = 500.000000
HOME_SEARCH_VEL = 20
HOME_LATCH_VEL = -10
HOME_IGNORE_LIMITS = YES
HOME_IS_SHARED = 1
HOME_SEQUENCE = 0

[AXIS_2]
TYPE = LINEAR
HOME = 490.0
MAX_VELOCITY = 85.5008550086
MAX_ACCELERATION = 500.0
STEPGEN_MAXACCEL = 625.0
SCALE = 200.0
FERROR = 1
MIN_FERROR = .25
MIN_LIMIT = -0.001
MAX_LIMIT = 500.0
HOME_OFFSET = 500.000000
HOME_SEARCH_VEL = 20
HOME_LATCH_VEL = -10
HOME_IGNORE_LIMITS = YES
HOME_IS_SHARED = 1
HOME_SEQUENCE = 1
"
Last Edit: 08 May 2011 05:15 by czerech.
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08 May 2011 11:32 #9652 by czerech
czerech replied the topic: Re:Combine all Home and LImit switches
Yes, i'm useing sequence from to first diagram of Your link.

in a second i will paste AXIS section of my INI file and HAL file.

regards,
Piotr
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08 May 2011 11:56 #9653 by BigJohnT
BigJohnT replied the topic: Re:Combine all Home and LImit switches
The second example in the link is a more normal scenario for homing where both search velocity and latch velocity are the same sign. The first example only works for a short pulse and the velocity is fast enough to carry it off the switch so the switch is not "on" when the latch part of the homing is performed.

John
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08 May 2011 14:01 #9655 by czerech
czerech replied the topic: Re:Combine all Home and LImit switches
thank John for reply But its non working correct anyway. I think i have found the problem.

I make a test, turn on only limit switches on Z axis, when X axis (HOME_SEQUENCE=0) was based everything was ok. When X asis (HOME_SEQUENCE=1) trip switch, "joint 2 on limit switch error" appears.

I think "HOME_IGNORE_LIMITS = YES" only affects limit "pos" and "neg" of this axis, and I have all 4 limits (from both axis) connected to one pin.


How i can ignore all limit switches, not only those from currently based axis?

regards,
Piotr
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08 May 2011 14:58 #9656 by BigJohnT
BigJohnT replied the topic: Re:Combine all Home and LImit switches
After the Z homes is it sitting on the switch?

John
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12 May 2011 09:13 #9738 by czerech
czerech replied the topic: Re:Combine all Home and LImit switches
Yes, table hits switch and sit on in.

ehhhh, i make mistake in post before.

"I make a test, turn on only limit switches on X axis, when X axis (HOME_SEQUENCE=0) was based everything was ok. When Z axis (HOME_SEQUENCE=1) trip switch, "joint 2 on limit switch error" appears. "

regard,
Piotr
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