soft limits while unhomed

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9 years 9 months ago - 9 years 9 months ago #86155 by lumberjack_jeff

File Attachment:

File Name: wsb.ini
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My machine is a 4x8 4-stepper gantry router. I built it in '09 around EMC2 2.3.1. I used it for many years in this configuration without upgrading. I set up a new(er) computer using the Debian Wheezy LinuxCNC distro and began using it this month.
With no home or limit switches, I would rehome the machine upon each startup by jogging to the appropriate position (depending on the workpiece)
"Master version"? I dunno... I obtained internet access in my shop this week and I simply asked synaptic to "update all" and among the other upgrades, linuxcnc 2.8.0 was one of them.
I don't know what "world mode" and "joint mode" are.
I have minimal seat time with this new version - I asked this question when I first noted this new behavior upon initial startup after upgrade - the previous version did not remember the last tool location after shutdown so perhaps this will be a non-issue upon subsequent startups.
When I go back to the shop I'll do some more testing to better answer your questions.
Where do I find the master docs? I don't see them in the wiki.
Are there instructions online to downgrade to a previous version if necessary?
Last edit: 9 years 9 months ago by lumberjack_jeff.

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9 years 9 months ago - 9 years 9 months ago #86165 by BigJohnT
Replied by BigJohnT on topic soft limits while unhomed
Looks like the configuration script left out the necessary bits for jogging with no home switches.

to make work with jog before homing:
a) use 'immediate homing' on all joints
HOME_SEARCH_VEL = 0
HOME_LATCH_VEL = 0
HOME_USE_INDEX = NO
HOME_SEQUENCE = 0
b) use [KINS]KINEMATICS=trivkins kinstype=B
Code:
[KINS] # USE kinstype=B KINEMATICS = trivkins kinstype=B #This is a best-guess at the number of joints, it should be checked JOINTS = 3 [AXIS_X] MIN_LIMIT = -1 MAX_LIMIT = 99.0 MAX_VELOCITY = 7.60009314674 MAX_ACCELERATION = 12.5 [JOINT_0] # IMMEDIATE HOMING: HOME_SEARCH_VEL = 0 HOME_LATCH_VEL = 0 HOME_USE_INDEX = NO HOME_SEQUENCE = 0 TYPE = LINEAR HOME = 0.0 MAX_VELOCITY = 7.60009314674 MAX_ACCELERATION = 12.5 STEPGEN_MAXACCEL = 15.625 SCALE = 2037.347204161 FERROR = 0.05 MIN_FERROR = 0.01 MIN_LIMIT = -1 MAX_LIMIT = 99.0 HOME_OFFSET = 0.0 [AXIS_Y] MIN_LIMIT = -1 MAX_LIMIT = 52.0 MAX_VELOCITY = 8 MAX_ACCELERATION = 10.0 [JOINT_1] # IMMEDIATE HOMING: HOME_SEARCH_VEL = 0 HOME_LATCH_VEL = 0 HOME_USE_INDEX = NO HOME_SEQUENCE = 0 TYPE = LINEAR HOME = 0.0 MAX_VELOCITY = 8 MAX_ACCELERATION = 10.0 STEPGEN_MAXACCEL = 12.5 SCALE = 2037.347204161 FERROR = 0.05 MIN_FERROR = 0.01 MIN_LIMIT = -1 MAX_LIMIT = 52.0 HOME_OFFSET = 0.0 [AXIS_Z] MIN_LIMIT = -3.0 MAX_LIMIT = 7 MAX_VELOCITY = 2.0 MAX_ACCELERATION = 10.0 [JOINT_2] # IMMEDIATE HOMING: HOME_SEARCH_VEL = 0 HOME_LATCH_VEL = 0 HOME_USE_INDEX = NO HOME_SEQUENCE = 0 TYPE = LINEAR HOME = 0.0 MAX_VELOCITY = 2.0 MAX_ACCELERATION = 10.0 STEPGEN_MAXACCEL = 12.5 SCALE = 4815.593445 FERROR = 0.05 MIN_FERROR = 0.01 MIN_LIMIT = -3.0 MAX_LIMIT = 7 HOME_OFFSET = 0.0
Last edit: 9 years 9 months ago by BigJohnT.
The following user(s) said Thank You: lumberjack_jeff

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9 years 9 months ago #86321 by lumberjack_jeff
Works perfectly! Thanks!

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