Episode 11 - Wrap up and my settings for ER-20 Calibration

Описание: As I noted in the last video, I decided to not use linear advance with this printer as of now. I could not get results to be acceptable, even with repeated retraction and linear advance tuning. My final results (after printing and doing some modifications to the values we found in the videos):

E-steps - right on at 100, no change to EEPROM

Flow - no adjustment; however, I am finding that initial layers and brim/skirt flow rates are best at about 105% (which I adjust in my slicer - Cura). I leave the walls at about 98% flow, and the infill and other layers I leave at 100% flow.

Temperature (for Matte Navy Blue Eryone PLA) - I"m now printing the first layer at 230c and normal layers at 207c. My bed temperature is at 68c for all layers.

Retraction settings - 4.25mm at 50mm/sec. This is a bit more retraction speed than we tuned for, but I've found it's actually better with 'real world' prints.

Acceleration - I wound up doing a couple more tests as several forum members recommended much lower accel settings. I found that the ER-20 has two "sweet spots" - one at 1100 mm/sec and another at 600 mm/sec. I now have my print and travel acceleration set to 600 mm/sec, and my retraction acceleration I have left at 1200 mm/sec. Realistically, being conservative here makes sense, as there will be little to no overall print timing changes with acceleration changes in this range for a small volume printer. Remember that acceleration is the speed "getting up to print speed" - which will probably be around 45-55mm/sec. The change to 600 mm/sec is very minor. Remember you can set this on your LCD or using the M204 command through Pronterface.

Junction Deviation - as expected, with acceleration down to 600, junction deviation tuned higher (which is actually less slow down impact) at 0.09. This is the M205 line using Pronterface (or you can adjust it right on your LCD).

Linear Advance - not using it. It tuned around 3.0 the last time I tried.

That's it! Hopefully these numbers will help!

I hope this practical, down-to-earth calibration guide has been helpful. If you would, please like and subscribe to my channel. I’m hoping to do a number of printer calibrations in order to help out folks either new to the hobby or stuck trying to get their printer to work correctly.

Links:

Teaching Tech Calibration Site: https://teachingtechyt.github.io/cali...

Pronterface Terminal Software: http://www.pronterface.com/

ER-20 Product Page: https://www.eryone.com/fdm/show/2.html

Printable upgrades for your ER-20:

Hot end fix: https://www.thingiverse.com/thing:483...

Filament guide: https://www.thingiverse.com/thing:480...

Bowden Tube Collet: https://www.thingiverse.com/thing:473...

Filament roller expansion: https://www.thingiverse.com/thing:464...

Cool LCD controller knob: https://www.thingiverse.com/thing:434...