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Stepper drivers burning out

by Monomethylhydrazine

Is anyone else having a lot of trouble with stepper drivers burning out around 1,200 hours? I have replacements in the mail, does anyone have advice to prevent it?

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Nozzle near to bed

by Jimbob_McCoi

Hello guys - after many hours of calibrating I finally managed that the nozzle has the same distance everywhere on the print bed.

Unfortunately it is everywhere ~ 0,12 mm too much. In which direction I have to adjust the Z-height to compensate this 0.12 mm. I don't want the nozzle to scratch my print bed.

So example 100 - 0,12 = 99,88 or 100 + 0,12 = 100,12?

The same question applies to Z-Offset

-14.60 - 0.12 = 14.72 or -14.60 + 0.12 = 14.48?

Translated with www.DeepL.com/Translator

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Linear plus zits on corners

by Bking1340

Good day all

I have printed this bracelet: https://www.thingiverse.com/thing:13505
It needs 1 perimiter, 0% infill, 0 top/bottom.
On all the corners I have what looks like zits/blobs. There are no retraction threw out the complete print - It basically prints like vase mode.

I am now thinking that my acceleration and or jerk settings are incorrect - seems like over extrusion on corners?

I`m on marlin 1.1.9 that I got here on thingiverse.

Maximum feedrates (units/s):
M203 X1000.00 Y1000.00 Z1000.00 E200.00
Maximum Acceleration (units/s2):
M201 X2000 Y2000 Z2000 E2000
Acceleration (units/s2): P R T
M204 P600.00 R3000.00 T1000.00
Advanced: B S T X Y Z E
M205 B20000 S0.00 T0.00 X10.00 Y10.00 Z10.00 E10.00

Any Ideas?

Stretchy Bracelet
by emmett
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Zits/blobs my stupid experience

by Bking1340

Good day all.
I`m printing now for 4 years and 2 months - 1 perspex frame prusa i3 iteration that is still printing flawless - had a home build cartesian and a he3d delta when they first came on the market. The he3d delta also printed flawlessly despite the inferior rollers and construction.
Bought myself the anycubic linear plus 2 months ago and added tmc2208 xyz drivers, original e3d v6 hotend and titan extruder with capricorn bowden.

I have been struggling with zits/blobs for a month now - I almost threw the delta into the rubbish bin (dont think it will fit :-)). I have 4 years experience, but still need to learn a bunch and Im not the brightest pencil in the packet :-).
My retraction went from 1mm to 7mm where it lost part of layers on 7mm, but in between those numbers nothing really changed with the zits. Negative extra restart distance on retraction from -0.1 to -1mm where I also lost layers on small islands. Coasting distance from 0.1 to 1mm where I lost layers at 1mm. Wipe distance from 2mm to 7mm no changes. Retraction speed from 20mm/s to 60mm/s. Different colours/types of PLA filament. And blobs all over the show.
I replaced my 0.5mm nozzle with a 0.4mm and saw a slight difference.I replaced the capricorn bowden with the stock white ptfe bowden (550mm) and I saw a bigger difference (Measured my filament and they are 1.74 to 1.76 but on 3 meters 90% = 1.75.

MY PROBLEM IS: I did not think about temperature or I did think in the incorrect way. I tried 198 to 180. My thoughts were the cooler the less the filament will seep out of the nozzle which in turn will reduce blobs - may be true depending on temperature.
I increased my temperature to 210 and printed out a 20mm cube. Normally when it retracts, move to the next layer and extrude on the corner, there will be a small blob. With the same settings but higher temperature, I now have a +- 0.2mm under extrusion in the corners where it starts to print every layer.
If you take a injection and, NO don`t squirt your dog with water - try to suck thick oil and thin oil - thin oil will be easier. The same with retraction, if the filament are hotter the retraction or suction will be better (to suck the filament back into the nozzle). Too high a temperature will end up in stringing.
Just thought I share my stupid struggle :-/

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Anycubic linear plus 20mm cube not 20mm

by Bking1340

Good day all.
1st thing - my diag rods are not 271.5mm as what I see in the 1.1.9 marlin firmware I got here at thingiverse. I just measured them with a ruler(only thing I had on hand) and they are more like 268mm. In any case, a 20mm cube are printing 19.80mm in x and y. I did reduce my delta_diagonal_rod from 271.5 to 269.5 and now x and y are closer at 19.95 (can maybe reduce to 269). BUT I have a problem with the z height, it measures 20.25mm. My delta were bought from anycubic on December 2018, I only replaced steppers with tmc2208 on xyz and installed a original e3d v6 and titan extruder. Can`t think it will be my steps per mm on xyz. I must add that I have a 0.10mm z-axis offset in simplify3d to lift the nozzle 0.10 on 1st layer (maybe due to nozzle/bed heat).
Any advice will be apreciated.

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