Klipper and Eryone Thinker SE - update, some thoughts (and ongoing issues)

I'm still going to do a series on Klipper and Eryone printers - specifically focusing on the Thinker SE (although I may try again on the ER-20 shortly).  This video is to document where I am in my own upgrade process - and to briefly note ongoing issues in this process.  This is, to put it bluntly, not for the faint-hearted, even if Klipper is, in the end, a more elegant and capable firmware  solution in the end.  Please ask some questions about individual pieces, etc., and I'll get back to you!  See below for some detailed notes.

Some quick notes (so as not to forget myself) about certain tuning things:

- Bondtech LGX - a 'cadillac' extruder - however, you MUST switch the outside wires on your cable connection to Bondtech's stepper motor if you have the standard Ender/Creality/Eryone, etc. style of printer.  This is entirely unclear in any documentation or resource - which is blatantly unsatisfactory and an oversight by Bondtech and their retailers.  Note - They say that 400 esteps is a good place to start.  I disagree - start with 410 and then do an extrustion test.  I wound up at 412 - which for Klipper results in a rotation_distance=7.76 (for the printer.cfg in the extruder section).  Lastly, you have to invert your extruder direction for the LGX.  On Klipper this is super easy - just put a "!" in front of your extruder direction pin variable.  Literally - just put the exclamation point at the front of that line.

- E3D V6 Gold edition - great hotend...BUT retraction is turning out to be exceptionally difficult to tune out.  This is, as I understand it, normal for all metal hotends - but I'm frustrated at this process right now.  I'm at 4mm of retraction...still trying to get speeds tuned.

- 2209 drivers (Eryone).  Pay attention to jumper settings (covered in their video on YouTube), and contact me for how to enable them in your Klipper printer.cfg.  Right now I have Z-steppers at 1.1 amps, X and Y and 900 ma, and Z at 800ma (max for the Bondtech motor is 1 amp).  I want to install the fifth driver to enable automatic gantry leveling, however, Eryone's board only allows 4 drivers to be in UART mode.  I'm not at all sure how a UART and standalone driver would be able to be configured to work for this - and I'm not sure how the script would look in Klipper's printer.cfg file.  Hopefully an expert will chime in here on how to do this.

Printermod LED lights were simple to install; however, you have to run a 24 volt tap (two wires) direct from the the power supply.  I did this and then collated that power line with the existing cable run to the printer.  The hot end LED setup was super simple - just use the installed crimp connector to run it from the hot end fan wires (no rewiring or soldering necessary).

Accelerometer testing for Resonance Tuning.  I can't get this to work yet.  I've finally got Klipper all setup to do it, but the accelerometer itself is returning a constant error code.  More to follow when I get some replacement accelerometer's here to try.

Links:

Thinker SE page - https://www.eryone.com/fdm/show/1.html

Klipper firmware page - https://www.klipper3d.org/

Eryone TMC 2209 drivers - https://eryone3d.com/products/tmc2209...

Bondtech LGX extruder - https://www.bondtech.se/product-categ...

Printermod LED kit - https://printermods.com/products/ulti...

E3D Gold hotend - https://e3d-online.com/products/v6-go...

Dana Olson's hotend carriage for the Thinker SE- https://www.thingiverse.com/thing:488...