Z Offset (calibration woes) & Question

[MichaelOToole]

It all started with a broken clockwork2 latch...

Recently latch part broke, so I replaced it with the reinforced version but could not get the latch to click in place/close.
I purchased the aluminum version (which comes in 3 parts) I replaced broken part, again it would not close...

Left with no option, I then took the assembly apart only to find another piece of the original broken latch, obviously it was the culprit.
I should point out I examined the broken latch pieces and they pretty much matched the first strengthened latch I printed.

Anyway, I removed it and reassembled using the 3 net aluminum parts... that fixed the main issue but now probe calibration is doing my head in.

Z-Offset Question

With the new part in place, I tried several print all of which failed on the first layer... Z offset must be wrong?

I ran probe calibration (several times), the results were pretty constant about -0.45, I edited my config (in my case that's probe.cfg) using this figure but still no luck...
I made adjustments starting at -0.4, which of course failed, then tried -0.35 which was looking promising but corner of print was messed up, so tried -0.33 and it was almost perfect, at least two print succeeded, a bit long winded but it might prove useful to someone down the road...

All I need to know now is why was the probe calibration so far away, did something change during an update or have I made mistakes?

 

[NoGuru]

We call them Gremlins in the US. Little fictional characters that like to mess with and break things for no reason.

 

[MichaelOToole]

I think I'm related to these little creatures

The breaking latch part would not have been an issue if I didn't take the easy and lazy way out, I should have looked more closely and took it apart.
Mind you, since I built my Voron 2.4, I only ever had one issue and that was bed adhesion, perhaps it was my Z-Offset setting all a long.

Just realized, the calculated zoffset using a 0.1mm piece of paper i.e. 0.450mm is exactly the same (+/-0.02) as that distance I measured as the travel distance after the hotend touches the bed until it triggers(led lights), this being the case, I would have preferred it to called something like 'touch to trigger' distance of the tap mechanism or at least mention it was related to the tap mechanism...

This would explain why when using 0.450 as offset, my prints were being dragges by the head, it was way too low... assuming the slicer doesn't allow for correction based on line height and variationd in print area probe measured values...

Sorry to keep going on about this but as I said, it was doing my head in (Irish ism... driving me nuts)

 

[NoGuru]

I recall your bed adhesion issues.

These new probes will end those for good. I use Beacon but others with Cartorapher have the same results, perfect bed mesh and adhesion every time, no matter what.

Also, I switched to Galieleo2 some time ago and its light years better then Clockwork. I too broke many latches on Clockwork.

 

[MichaelOToole]

Good to know, might be time for some upgrades...
Will have look at Beacon and Cartorapher, I'm guessing I will need some more printed parts, then checkout Galieleo2...