No motion after homing Z

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17 Jan 2022 14:25 #232121 by Jake
No motion after homing Z was created by Jake
I finally got my machine back up and running with new to me Dell Optiplex 9020.  I have experienced some oddities with 2.8 that I have not run into before.  When I home X,Y I get a message that states to "unhome axis and jog into limit switch"  I get this message when it is done homing each of those axis.  When I do the Z I do not get a message, it will home and show homed.  But then I can not get any motion on any axis, no message.

If I unhome Z then re-home, it is fine after that. 

Is there something new in 2.8 that you have to jog into each of the home limits before it can be homed?

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17 Jan 2022 15:16 #232128 by tommylight
Replied by tommylight on topic No motion after homing Z
Most probably limits are not set correctly in ini file so the limits are getting over run at the end when the home_final move is done.
Do you have home offsets and how much ?

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17 Jan 2022 19:02 - 17 Jan 2022 19:08 #232162 by Jake
Replied by Jake on topic No motion after homing Z
The home offsets on the X and Y are 1" Z is 0.5" Needed soft limit close on the Z for the toolchanger. 

Because my HOME and HOME_OFFSET are the same this is causing the behavior ?  So If I increase HOME value it sounds like this will take care of it. 

On the X and Y it is also the same, but does not stop anything or give me an error. 

I originally setup based on the third figure down.  I have 1 switch for limit and home.

This did not have any changes in the values, only change was the upgrade to 2.8.  Which the new to me 9020 is doing AWESOME.  And there is a 24" touchscreen on the way to make the move to Silver Dragon HD.

HOME = 0.5
MAX_VELOCITY = 4
MAX_ACCELERATION = 2
PID_MAX_VEL = 9.25
BACKLASH = 0.0008
INPUT_SCALE = 50673.0
OUTPUT_SCALE = 1.0
MIN_LIMIT = -18.5
MAX_LIMIT = 0.5
FERROR = 2
MIN_FERROR = 0.005
HOME_OFFSET = 0.5
HOME_SEARCH_VEL = 0.1
HOME_LATCH_VEL = -0.1
HOME_USE_INDEX = YES
HOME_IGNORE_LIMITS = YES

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Last edit: 17 Jan 2022 19:08 by Jake. Reason: code did not copy

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