Original Prusa I3 MK2 Manual

 
 
10 Materials  
 
Temperatures and the  ​heatb ed
​ tre atme nt b efo re  
​ prin t
​ a cco rdin g to  a  sp eci fic 
​mate ria l
​.  
10.1 ABS  
 
Material suitable for comm on, ro bust  o bje ct s.
 
 
● Nozzle temperature : 
​255
​  ​°C
 
● Bed temperature: 
​10 0 ° C . Yo u ca n se t th e b ed te mp era tu re  b etw een 8 0 to  1 10 ° C
 
depending the  ​size
​ o f a n o bje ct  (l a rg er  obje ct  me ans  hig her te m pera tu re )
 
● Heatbed:  ​Make sure th e su rface  is  clean a s  descri bed...

 
10.5 PP  
 
Polypropylene is a flexible  a nd re sist ant 
​mate ria l
​ su it a ble  fo r 
​prin tin g
​ o f th e p re ci se  o bje ct s
 
requiring the flexibility, fir mness  and p ersi stence .
 
 
● Nozzle temperature : 
​254 ° C
 
● Bed temperature: 
​95  -  100 ° C .
 
● Heatbed:  ​The best re su lt s  are  o bta in ed w it h  co mmo n sco tch  ta pe -  ju st  a tta ch  th e
 
tape directly to the p rin t su rface  a nd cl ean it  a fte r  th e p rin t is  fin ish ed.
 
10.6 Nylon (Taulman  Brid...

 
 
11 FAQ - Printer mainte nance and  p rint  issu es
 
11.1 Print surface pre paration
 
 
Print surface preparation  is  descri bed in  
​6.3 .2  PEI  p rin t su rface  p re para tio n
​ ch apte r.
 
 
11.2 Clogged / jamme d e xtru der
 
Material clogged in the ext ruder  ca n ca use  p ro ble ms  wit h  th e 
​prin tin g
​ o r w it h  th e 
​ lo adin g
​ o f a
 
new  ​filament ​.  
● Heat the nozzle, remo ve th e fila me nt fro m  th e e xt ru der  and cu t th e r o d cca  1 0 cm
 
above the damaged...

 
11.3 Nozzle cleaning  
Use a wire brush to clean  th e 
​nozzl e
​ fro m  outsi de. H eat th e 
​nozzl e
​ b efo re  yo u d o so .
 
If  ​filament ​ is not extruded fro m  a 
​ nozzl e
​ (o r in  ve ry  sma ll  vo lu me ), fir st  ch eck  th e e xt ru der fa n
 
is working  ​properly ​ and that th e te mp era tu re  is  se t co rre ctly  (PL A 2 10 ° C ; A B S 2 55 ° C , H IP S
 
220 °C, PET 240 °C). Als o ch eck  th at th e 
​fila me nt
​ w as  co rre ctly  lo aded in to  th e e xt ru der.
 
If the...

 
 
 
Pict. 2 9 - 
​ Nozzl e ch ange
 
11.5 Axis fluency  
● If one of the axes doesn ’t  mo ve flu id ly  yo u ca n a pply  a sm all  a m ount o f o il  ( e .g . a ll
 
purpose machine o il).  T his  will  lo w er  th e fri ct io n.
 
 
45
  

 
 
11.6 Printing proble ms
 
 
11.6.1 Layers break and split when printing from ABS material  
 
ABS  ​material ​ has a higher th erma l  e xp ansi on th an o th er 
​mate ria ls
​. W e su ggest  o th er
 
materials ​ as PET, HIPS or PLA when yo u 
​prin t
​ la rg er 
​models
​.  
 
11.6.2 Models contain either too much or not enough of the filament  
 
You can manage the  ​filament
​  ​ flo w
​ d urin g th e 
​prin t
​. U se  th e L C D-kn ob a nd ch oose  
​Tune -
 
Flow ​ - xx% ​ where you can a dju...

 
 
12 FAQ - common  issue s whe n as se mb ling t h e p rin te r k it
 
12.1 Nozzle/print su rf ace  gap  is  gre ater in  th e mid dle  t h an  at  t h e
 
corners  
The reason of this issue i sn’t  th e b ent p rin te r  su rface  o r  bed b ut a  d ist orte d Y -a xi s.  W e
 
suggest to remove the wh ole  Y-a xis  out o f th e 
​prin te r
​. F ollo w  th ese  st eps:
 
 
● Align the Y-axis so th at e ach  Y-co rner  is  sittin g o n th e ta ble  -  n one sh ould  b e o ff th e
 
table.  
● Align the...

 
12.2 Printer stops prin ting soon  af te r start
 
 
Extruder is likely overhea te d. Ma ke su re th e 
​nozzl e
​ fa n is  worki ng 
​pro perly
​. If n ot, p le ase
 
inspect its connection acc ord in g to  th e a sse mbly  ma nual.
 
 
 
 
 
 
Pict. 3 1 - 
​ Proper
​ w iri n g o f th e co nnect ors
 
   
12.3 Printer can’t read  SD  card
 
 
First, make sure that the  ​file  n am e
​ o n th e SD  
​ do es n ot co nta in  s p ecia l c h ara cte rs
​ -
 
otherwise the file could n ot b e d isp la ye d...

 
12.4 Loose X- and/or  Y-axis be lts
 
 
Check if both belts are  ​properly
​ tig hte ned, lo ose  b elt s  would  ca use  a  
​prin te r
​ m alf u nct io n a nd
 
prevent  ​proper ​  ​printing ​. The e asi est  w ay  to  ch eck  is 
​prin tin g
​ a  ro und o bje ct  -  if  a ny  of th e
 
belts are not tightened  ​properly
​ th e re su lt  is  an irre gula r  sh ape in st ead o f a  p erfe ct  ci rcl e.
 
Y-axis belt is located unde r th e 
​he atb ed
​, X-a xis  belt  mo ves th e e xt ru der. S ee th...

 
12.5 Detached cable s to  the h eatbe d
 
 
Do not forget to use a spi ral  w ra p o n 
​heatb ed
​  ​cable s
​ a nd a tta ch  th e 
​cable s
​  ​pro perly
​ so  th ey
 
won’t restrict movement du rin g p rin tin g.
 
 
 
 
Pict. 3 4 - 
​ Cable s
​ to  b e w ra pped in  a  sp ira l  w ra p
 
 
12.6 Loose heatbed  zip  tie s
 
 
Make sure that the zip tie s under  th e 
​heatb ed
​ a re  
​ pro perly
​ tig hte ned. T here  a re  th re e zi p tie s
 
in total, two on the right si de, o ne o n th e le...