Need Help!- HOME LIMIT SETTINGS IN EMC2

[Gads]

HI HAVING DIFFICULTY SETTING UP LIMIT/HOME SETTINGS TO WORK RIGHT
I USE 2 SWITHES IN SERIES ON EACH AXIS AND CANT GET THINGS TO DO WHAT I WANT IN STEPCONFIG. MY AXIS'S MOVE THE RIGHT DIRECTION WHEN JOGGED IN EMC BUT THE HOME ALWAYS GOES THE WRONG DIRECTION AND I HAVE TRIED ASSORTED SETTINGS IN STEP CONFIG. FOR EXAMPLE I HAVE MY X I WANT TO HOME TO THE LEFT SWITCH AND WANT THIS TO BE X0 AND X-LIMIT. TRAVEL IS 15.5, I HAVE SETUP TO BOTH LIMIT, MIN+HOME X, MAX HOME X ETC.. HAVE ALSO SWAPPED SAME AND OPPOSITE SETTINGS BUT THE SYSTEM STILL RESPONDS STRANGLY. I SELECT HOME X AND THE SYTEM TRIES TO GO TO THE + SWITCH.
? DO YOU HAVE TO HOME ON THE PLUS SIDE IN EMC AND WORK G54 ALWAYS BE A NEG VALUE. MANUAL IS VERY BREIF ON THESE SETTINGS AND I COULD USE SOME INPUT
THANKS GADS

[acondit]

Originally Posted by Gads HI HAVING DIFFICULTY SETTING UP LIMIT/HOME SETTINGS TO WORK RIGHT I USE 2 SWITHES IN SERIES ON EACH AXIS AND CANT GET THINGS TO DO WHAT I WANT IN STEPCONFIG. MY AXIS'S MOVE THE RIGHT DIRECTION WHEN JOGGED IN EMC BUT THE HOME ALWAYS GOES THE WRONG DIRECTION AND I HAVE TRIED ASSORTED SETTINGS IN STEP CONFIG. FOR EXAMPLE I HAVE MY X I WANT TO HOME TO THE LEFT SWITCH AND WANT THIS TO BE X0 AND X-LIMIT. TRAVEL IS 15.5, I HAVE SETUP TO BOTH LIMIT, MIN+HOME X, MAX HOME X ETC.. HAVE ALSO SWAPPED SAME AND OPPOSITE SETTINGS BUT THE SYSTEM STILL RESPONDS STRANGELY. I SELECT HOME X AND THE SYTEM TRIES TO GO TO THE + SWITCH. ? DO YOU HAVE TO HOME ON THE PLUS SIDE IN EMC AND WORK G54 ALWAYS BE A NEG VALUE. MANUAL IS VERY BRIEF ON THESE SETTINGS AND I COULD USE SOME INPUT THANKS GADS

GADS,

They following is the HAL setup for my home and limit switches for my router (using a CandCNC mini-IO breakout board).
# create a signal for the estop loopback
net estop-ext <= parport.0.pin-10-in-not
net estop-out <= iocontrol.0.user-enable-out
net estop-ext => iocontrol.0.emc-enable-in
net both-home-x <= parport.0.pin-11-in
net both-home-y <= parport.0.pin-12-in
net both-home-z <= parport.0.pin-13-in
net both-home-x => axis.0.neg-lim-sw-in axis.0.pos-lim-sw-in axis.0.home-sw-in
net both-home-y => axis.1.neg-lim-sw-in axis.1.pos-lim-sw-in axis.1.home-sw-in
net both-home-z => axis.2.neg-lim-sw-in axis.2.pos-lim-sw-in axis.2.home-sw-in


And here is what I used in my ini file for the home switch configuration.

#+ First axis
[AXIS_0]

TYPE = LINEAR
HOME = 0.000
MAX_VELOCITY = 2.0
MAX_ACCELERATION = 20.0
STEPGEN_MAXACCEL = 21.0
SCALE = -2000.0
FERROR = 0.05
MIN_FERROR = 0.01
MIN_LIMIT = -38.500
MAX_LIMIT = 38.500
HOME_OFFSET = -0.100
HOME_SEARCH_VEL = -1.250
HOME_LATCH_VEL = 0.250
HOME_USE_INDEX = NO
HOME_IGNORE_LIMITS = YES
HOME_SEQUENCE = 1

#+ Second axis
[AXIS_1]

TYPE = LINEAR
HOME = 0.000
MAX_VELOCITY = 1.5
MAX_ACCELERATION = 20.0
STEPGEN_MAXACCEL = 21.0
SCALE = 2000.0
FERROR = 0.05
MIN_FERROR = 0.01
MIN_LIMIT = -24.000
MAX_LIMIT = 24.000
HOME_OFFSET = -0.100
HOME_SEARCH_VEL = -1.00
HOME_LATCH_VEL = 0.250
HOME_USE_INDEX = NO
HOME_IGNORE_LIMITS = YES
HOME_SEQUENCE = 1

#+ Third axis
[AXIS_2]

TYPE = LINEAR
HOME = 9.295
MAX_VELOCITY = 1.3
MAX_ACCELERATION = 25.0
STEPGEN_MAXACCEL = 26.5
SCALE = 2000.0
FERROR = 0.05
MIN_FERROR = 0.01
MIN_LIMIT = -9.295
MAX_LIMIT = 9.295
HOME_OFFSET = 9.295
HOME_SEARCH_VEL = 1.00
HOME_LATCH_VEL = -0.250
HOME_USE_INDEX = NO
HOME_IGNORE_LIMITS = YES
HOME_SEQUENCE = 0

I don't know that this is the best way to set them up but they do work. I have 2 switches on each axis wired in a loop normally closed. I started out with all six switches wired in one loop but EMC2 would tell me that it tripped all three axii when it hit a limit switch. My X and Y home at zero but my Z homes at the top of its travel.

Hope this helps,
Alan

[Gads]

acondit Thanks for the info you posted, between that and the info I found in the integrator manual I was able to get things working the way I want. This software
is very strange, I think I have 8 hours into motor/pin config and limit switch settings so far and nothing about any setting has been what you would expect. very trial and error, but you got me going in the right direction anyway.
Thanks to all

[Big John T]

Originally Posted by Gads acondit Thanks for the info you posted, between that and the info I found in the integrator manual I was able to get things working the way I want. This software is very strange, I think I have 8 hours into motor/pin config and limit switch settings so far and nothing about any setting has been what you would expect. very trial and error, but you got me going in the right direction anyway. Thanks to all

If you use the EMC2 StepConf Wizard from the menu you can be up and running in a couple of minutes... for a basic stepper system.

John

[Gads]

Hi Big John that is what I thought, come to find out alot of time was spent figuring out
that step config had been worded improperly the motor/leadscrew settings are/where backwards when approached from mechanical point of veiw. I believe samco took the initiative to verify this and has stated in another post of mine that the program will reflect this in the next update. also home/limit settings are confusing at least. it all came down to trial and error and help from folks on this site.
Thanks again all

[Big John T]

What is confusing about the home/limit settings?

Perhaps the author can change the wording...

What exactly was the trip up for you?

John