A lesson to all (Eddy Duo and eddy-ng content)

Sovol SV08
1

OK, so…I’ve been driving myself insane trying to get a first layer worthy of products being sold to people for actual money. The Eddy Duo was supposed to fix it, but all it’s given me are new problems - unreliable Z-offset, weird bumpy height maps, strange first layer flaws (usually in the same places)…tonight, a light bulb came on. What if…

…I didn’t just trust the designer of the Eddy mount I used for the X and Y offsets? I mean, I had the mount SLS-printed in nylon just to avoid any local accuracy issues, and it came back perfect, so it couldn’t be that…but what if the designer got it wrong? So I measured the offsets myself.

Original offsets (X/Y): -16 / 11.5
New offset (X/Y): -17.1 / 8.8

Bloody miles out, way more than can be accounted for in a bit of wiggle or poor alignment.

My bed variance has gone from ~0.22mm variance to ~0.14mm variance (R3men bed), and after a bit of tuning the Z-offset is bang-on every time. I’ve been obsessively printing first layers for the last hour and a half, and nothing but perfect sheets.

The lesson is this: no measurement is more accurate than your own.

And people wonder why I have trust issues…

1 Like
2

yes - “trust, but verify” is still valid today. This isn’t anything new.

3

Hi I have an SV08, I have purchased the r3man bed, BTT Smart Filament sensor and Eddy Duo but lack confidence to install the kit. Any advice, pointers would be appreciated. Does the touch sensor block on the back right of the printer need to be moved up or down to match the hight of the new bed?

Thank you

4

I use eddy-ng for the z-offset, but…what I can tell you is that the original brush position still works just fine, so I’d imagine it should be OK.

5

Thank you, did you have to go mainline first?

6

Yes, the stock firmware when I bought the machine (February ‘24) didn’t support eddy current probes.

7

i been getting very bumpy bed meshes as well - especially on the left and right edges, and been getting some under extrusion in some spots on my first layer.

Which mount are you using, and how do you manually measure the offsets?