Replaced Hard drive - now my 'fast move' (SHIFT->arrow |PgUp/PgDn is not working

I'm not sure if you were asking me to upload a video to YouTube showing what is happening - but that's what I did. The video link is here:

youtube.com/shorts/D5WTf5WWpfo

It's very hard to 'see' or hear - but as part of the homing function, the axis slowly approaches the limit switch, then moves away, then back and finally 'jumps' away from the switch.

I tried changing the MAX_ACCELERATION setting in the .INI - in both the AXIS_X and JOINT_0 sections. I halved them but it made no difference. I also attempted to move the sliders at the bottom of the LinuxCNC screen (below the jog section) way down one at a time - but that made now changes.

If I try to run even a simple shape (gcode for a small rectangle) it just 'locks up' like you see in the video when I attempt to press the 'SHIFT-(any arrow).

I'm just buffalo'd - I cannot figure it out.

Arden

Set the HOME_FINAL_VELOCITY to something smaller.
If they are not in the ini file, add them for each joint.

I added HOME_FINAL_VELOCITY to the AXIS_X / JOINT_0 section(s). I set it to match the value for the HOME_SEARCH_VEL and HOME_LATCH_VEL. I also increased the HOME_OFFSET to -.500000 to make sure there was some visible movement. Nothing changed - it locked up trying to move the axis.

Here is that section of the INI file - in case any of the other entries look odd.

#*** AXIS_X *******************************
[AXIS_X]
MAX_VELOCITY = 1.0
MAX_ACCELERATION = 30.0
MIN_LIMIT = -0.01
MAX_LIMIT = 8.0

[JOINT_0]
TYPE = LINEAR
HOME = 0.0
MIN_LIMIT = -0.01
MAX_LIMIT = 8.0
MAX_VELOCITY = 1.0
MAX_ACCELERATION = 30.0
STEPGEN_MAXACCEL = 37.5
SCALE = 8000.0
FERROR = 0.05
MIN_FERROR = 0.01
HOME_OFFSET = -.500000
HOME_SEARCH_VEL = -0.050000
HOME_LATCH_VEL = -0.050000
HOME_FINAL_VELOCITY = -0.050000
HOME_IGNORE_LIMITS = YES
#******************************************

OK - I don't know how this got so 'catty wompus' but... turns out - it was my stepper setting. Originally - it was 8000 steps /inch. which seems to be what was in my 'backup' .INI. When I checked my step setting and did the math - I realized it should be 4000 steps. That improved the movement, but I was still getting 'follow errors' (or something like that). One thing I DID notice is - I was out by a factor of 2 when I did a G0 X.5 command. I went back to 8000 and suddenly I was out by a factor of 4... oops - wrong direction. Changed to 2000 steps/in and all my errors have gone and I am able to use the machine again.

I have to confirm yet - but I'm using a chinese 'blue' board parallel port controller and I'm wondering if my stepper switch settings are documented wrong.

Anyways - crisis resolved. Thank you for your help - this discussion can be closed.