Trident 250, secondary Y peak (solved)

[vapid plover]

First time trying to tune IS, trying to clear that secondary Y peak. I think belts don't look too bad? But I wonder if that weird peak on the A belt could be the contributing factor (same frequency?)

Trident 250 (LDO Rev C kit)
Dragon Burner + Beacon
Using Beacon as resonance tester

Belts tuned to ~120Hz @ 150mm (with phone app)

[rain juniper]

👋
ping me or reply to this message so we know u are ready please

[fossil goblet]

Hello

[vapid plover]

Hello!

[vapid plover]

hi! I think it's good to go now, I realised I'd ran the IS and belt tests with slightly different settings before, now I ran them back to back with identical settings

Should I go forward and print the hollow cube with the recommended IS settings (mzv for both axis)

thank you both in advance for your help 🙂

[rain juniper]

Yes

Before printing…

• make sure u have the values from the x and y graphs in your config. It must be 6 values in total
• Set outer wall accel to the lower value of the two recommendation, minus 200.
• disable auto slow down
• disable slow down for cooling

Shaper X
Freq x
Damping X

Shaper Y
Freq Y
Damping Y

https://www.klipper3d.org/Config_Reference.html#input_shaper

[vapid plover]

Before printing I decided to:

• Run Ellis' TEST_SPEED, with this I got skipping past 6300mm/s^2 of accel so used 6000mm/s^2
• Did belt + resonance testing after heatsoak, similar results to cold (previous images in the post), but used these values for the IS

Used these print settings

I don't think it looks too bad? 😄

[rain juniper]

u shouldnt get any skipping at all at 7k accel

post your klippy.log please

Rollover first

[fossil goblet]

The pattern looks like speed issues

[vapid plover]

I wonder if I may have the belts too loose and I suck at interpreting the spectrograph? It doesn't just skip, it hits the AB mounts

this was at 6500, at 6000 it's fine :/

[rain juniper]

get yourself the tension meter https://github.com/Diyshift/3D-Printer/tree/main/GT2 Belt Tension Meter

[vapid plover]

ah yes sorry forgot to mention that I ordered the non-printable for it yesterday, should probably get printing the other parts 🙂

[rain juniper]

please send pictures of the back of both A and B drives so we see the belt path

[rain juniper]

verify good camera focus and lighting before sending

[vapid plover]

I think the path looks OK? Also tried tensioning the belts with the gates app this time, now they sound fine 😄 but it still slams into the back when above 6000mm/s, it's weird, it doesn't sound like the belt slips at any place

[fossil goblet]

are you trying to run it at 6000 mm/s (speed)

if so it ain't going to do that

[vapid plover]

6000mm/s^2 lol

[fossil goblet]

what speed are you trying to do

[vapid plover]

1000mm/s, it's a bit less than the maximum it could reach with 6000mm/s^2 in this bed size

[fossil goblet]

Try slowing down you speed to 500 mm/s

[vapid plover]

that was simple enough! should've read Ellis' guide more carefully, made easily to 10k mm/s^2 without skipping before the other people in the house went to bed and had to stop, I'll do another print with higher accel tomorrow! thank you

[rain juniper]

all good. thanks for the pictures 🙂

[vapid plover]

So, accel was good up to 11km/s^2 and I stopped testing there, I'm happy with running 10k for movement. Speed skipped at 800 mm/s but using 450 / 500.

printed the cube again with these settings, slower speeds, more accel in external perimeters

Oh, I ran the shake test again after tightening the belts

[fossil goblet]

I would call this good - especially at the speeds you are running

[vapid plover]

The limiting factor there would be max flow?

or kinematics

[fossil goblet]

I do not think there is anything left for us to help with

[vapid plover]

agree 😄 thank you so much

[fossil goblet]

Welcome