Hello!
I have wanhao i3 v2 with lots of upgrades for sterdiness.
It was printing perfectly (well almost) until i started noticing ripples on X axis walls on printed parts.
Then i saw the cause - X idler bearing failed. I have replacied it with and upgrade of mine. (was thinking of it for a long time).
After upgrade is done, all is set up i started to print.
But i cant get the quality to even to normal. All sides of part come out with ripples. Especialy with 0.1 layer and 0.4 shell thikness. (nozzle is 0.4. PLA)
Tryed all temps - no difference. Tryed different PLA make - same. Yesterday cheked all places of printer tightened everything i could - still bad quality.
Strangly round objects come outr very well, but square are bad.
Examples:
http://3dtoday.ru/upload/resize\_cache/main/7bd/1920\_1080\_1/20160625\_030717d01.jpg
0.1, shell 0.8
http://3dtoday.ru/upload/resize\_cache/main/0dc/1920\_1080\_1/20160629\_005916m01.jpg
http://3dtoday.ru/upload/resize\_cache/main/ef5/1920\_1080\_1/20160629\_005946t01.jpg
http://3dtoday.ru/upload/resize\_cache/main/fbc/1920\_1080\_1/20160629\_005929u01.jpg
0.1, shel 0.4
http://3dtoday.ru/upload/resize\_cache/main/0f3/1920\_1080\_1/20160629\_010018a01.jpg
0.25 shell 0.8 sides or but there are slight verticval dent on the left near corner.
same part back side
http://3dtoday.ru/upload/resize\_cache/main/531/1920\_1080\_1/20160629\_010006p01.jpg
dent again on opposit corner
http://3dtoday.ru/upload/resize\_cache/main/fe4/1920\_1080\_1/20160629\_080004.jpg
Strangly support is set to grip (it used to print like square honecombs but now it prints like thin posts - skips wals between crossings)
Please people help, dont know what to do…
Print with repetier via USB. Cobra duct. 225nozzle 45bed (tryed 205-230)
40mm speed. Beltrs tightened well. all leveleing is ok.
What are your acceleration speeds and jerk settings in the eeprom? I’m having similar issues after replacing a trashed out front Y idler pulley and doing the bearing block mod on the X so the belt doesn’t rub. Hasn’t been right since…
1 Like
jerk was from 8 to 12 and accel speeds are 800 for Y and X…
Looks like I ound the problem. The Y-ais geared pulley - it is bent. Also checked motor rotors - they seem ok. Tomorrow will get new pulleys. Stock a crap. They are not solid peace as i thought. Its a 3 peace thing. the geard part the thick part with grub bolts and inner center peace that holds other two together. And it is from crapy soft metal. will get a better ones. Will write upon results.
Will be curious hoe that works and will have to inspect my Y gear pulley to see of its crap too. Wouldn’t surprise me after what I saw on the Y idler pulley. Bearings fell out and turned to crap after 36 hours of printing
Ok, looks like i have found the cause!
1) The Y pulley has got bent because it is crap quality. changed stamped one to cnc one.
2) As i was afraid - motor shafts X and Y got slightly bent beause of belt tension
The question is where to buy the same motors? Nema 17 42HS34-0954
cant find that model any where. Most popular over the internet is 4401 model for sale.
