With a bit of time today, I decided to work further on using the MRR ESPA with the Labists Mini 3D printer (aka Easythreed X1).
Connecting MRR ESPA to Labists Mini 3D printer (aka Easythreed X1)
Connecting MRR ESPA to Labists Mini 3D printer (aka Easythreed X1) part 2
First, I did some testing with the latest Marlin bugfix-2.0.x, changing things like various options in Configuration_adv.h, given below with the values tried in brackets.
MINIMUM_STEPPER_PULSE (1, 2, 3, 5)
MINIMUM_STEPPER_POST_DIR_DELAY (200, 400, 650)
MINIMUM_STEPPER_PRE_DIR_DELAY (200, 400, 650)
SLOWDOWN_DIVISOR (2, 4, 6)
BLOCK_BUFFER_SIZE (16, 64, 256)
But I still had the "eaten" steps problem. Which did not appear at all when I use the previous fork by luc-github which is being archived here. The latest bugfix-2.0.x also makes the motors sound more... rough.
I guess the only way is to continue to use the old fork for the MRR ESPA.
Anyway, using the old fork, I decided to do a bit of fine-tuning for retraction settings.
Retraction of 8mm at 30mm/s seems to give the best result. I tried to increase retraction speed to 40mm/s to see if it will help, but the result from 6mm at 40mm/s seems to be worse than 6mm at 30mm/s, so I more or less decided to stick with 8mm at 30mm/s from now.
By the way, I have added a part cooling fan to the printer. It is a 25x25x7mm fan which I got from here. The official one can be obtained here.
I then tried to print a couple of LEGO compatible bricks, but without using a raft, the elephant foot makes those bricks useless.
I also printed this Scorbunny (50mm in height).
I guess I still need to work on the retraction just a little bit more.
Get the MRR ESPA board here.
MRR ESPA and MRR ESPE related social media:
Facebook page
Facebook group for users
Affiliate link to Labists mini 3D printer on Amazon.com
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