Firmware 3.4.5 larger delta home issues if head is not centered

[LucidWolf]

Greetings,

I noticed this issue recently when i updated my D300VS printer to the 3.x.x firmware. Normally I home after a print and most prints my head ends in the center so I never noticed this bug for a year.

If i home when the head is centered (X=0.0, or Y=0.0) there is no issues full travel, but if the head is at the edge of the plate while near the bottom (X=100, Y=100, Z=0) the homing is not working as expected. The first leg hits and then it only lets the second legs run for about ~50mm to 100mm and fails.

The latest update 3.5.4 firmware (saw stated issue with homing and bug fix notes about wrong zip so updated) at least the printer retries again at this new height and makes it to a full home but it still throws the (Error: G0/G1: insufficient axes homed) but at least it gave it another try and is fully homed and seems to be fixed.

Is there some sort of hard limit in the delta printer homing mechanics to make sure it does not rip your arms off if a stop fails and i am exceeding them? I would assume that limit should start once the first arm hits and it should not be determined by height of gantry.

Is anyone else seeing this issue?

Thanks,
Aaron

[dc42]

@LucidWolf it sounds like you need to increase the maximum travel of the main homing move in your homedelta.g file.

[o_lampe]

@LucidWolf When homing z-max my solution is to use the length of the vertical towers as limit for travel. Should one of the carriers be on the very low end, it will still home in one pass.
And just for ease of mind I home a second time before I start probing the bed.

[LucidWolf]

@dc42 Yes... Yes I do. Thank you. Could not find that anywhere and it was auto-generated i guess.
Happy as can be now.