Extrusion or bed level? Trident 300 build

[jetttttttttts]

I got same issues bed mesh show variance of around 0.1 but cannot make first layer consistency across the whole bed, too high on the left, too low for the right side.
Done everything. squaring my gantry, change buideplate, change to tap, change to cnc tap. Nothing solved. I think the problem is bed at calibration algorithms.

 

[evan]

Hey jetttttttttttts. Sorry to hear you are having the same / similar issue. It's frustrating. I have had my trident for almost a year now but so far have been unsuccessful in printing anything substantial on it.

Saying that, I was reading the Klipper documentation again a few days ago, and came across Axis Twist Compensation.

Axis Twist Compensation - Klipper documentation

www.klipper3d.org

Problem is, it does not work for dockable probes, which is what I use. So I went back to the Omron inductive probe, added the macro to Klipper and ran the calibration. To my surprise, it worked perfectly!!!! I didn't believe it, so ran a few more prints and got perfect first layers. I'm just printing with PLA at the moment and have not attempted ABS etc. I'm not a fan of the inductive probe but for now I can print. I have not tried ABS yet as I had removed my panels, etc. But will be trying ABS very soon.

I believe this test is at the very least telling me there is something wrong with my gantry, probably x. I need to reprint some parts and rebuild.

I hope the above may help you, or maybe you have already tried the Axis Twist Compensation ? If not, it might be worth the small effort. I am guessing it would work with TAP?

 

[Sanity Agathion]

Yeah I was about to suggest if there's a possibility to try different probe.

 

[evan]

I much prefer Klicky over the Omron inductive specified in the BOM. Have tried both without any luck fixing the first layer. To me it felt as though Klipper bed mesh was not compensating in the correct way or area. In fact, I was getting marginally better first layers without bed mesh. But the Axis Twist compensation calibration fixed the issue. I am hoping they (Klipper developer) add dockable probe support.

 

[Sanity Agathion]

Understood, I just wanted to ask whether it does the same with different probe.

 

[evan]

Yes, same as for KlickyNG and Omron inductive.

 

[evan]

.... a few days later.

Well, very happy to report - for the past 2 days I have been printing both ASA and ABS successfully on my Trident 300. Almost perfect first layer and prints across the whole bed. Keen to work out what the issue is but for the moment I'm not touching anything as I need to get some replacement parts for both my zero and trident printed.

Wanted to say thanks to all who have commented / helped! Cheers.

 

[Sanity Agathion]

Well, I hope it's not just a fluke and it will stay that way. Apparently when you started to threaten it with changing the probe, it started behaving!
I suggest you show it inductive probe from time to time to remind it its place

 

[evan]

Well, I hope it's not just a fluke and it will stay that way. Apparently when you started to threaten it with changing the probe, it started behaving!
I suggest you show it inductive probe from time to time to remind it its place

Unfortunately i never did resolve the issue.

 

[evan]

It's been a while.... but I finally fully rebuilt my LDO Trident 300. All new fdm parts, printed in Polymaker ASA. I also made a few changes - removing all the steel backers from the rail extrusions, pins (pins mod) in all the mounts and new BFI idlers / tensioners. Sensorless homing on X & Y. I have taken the drag chains off and am just currently running the wiring as seen in photo but intend to tidy that up as soon as possible. Re-installed all new klipper, fluidd, etc. Nice surprise was that the touch screen lcd worked perfectly this time around, whereas before the 'touch' didn't work.

I had almost abandoned this build, but third time was a charm. Just wanted to let all those who helped with suggestions etc. that I appreciated it. Hopefully happy printing for some time to come now...

Oh, and most importantly, the first layer seems very consistent now. The new build has been in operation for a few weeks with close to perfect first layers.