Original Prusa I3 MK2 Manual

 
6.3.8 Loading the filament into the extruder  
 
● You need to  ​preheat
​ th e 
​ no zzl e
​ b efo re  in se rtin g th e 
​fila m ent
​ ( a nd th e b ed to o if  yo u
 
like to  ​print ​ right away).  T he te mp era tu re  d epends  on th e 
​mate ria l
​ u se d. D eta ile d
 
information about 
​ no zzl e
​ a nd b ed te mp era tu re s are  d escr ib ed a t ch apte r 
​10
 
Materials ​.  
 
● Press the LCD-knob to  e nte r  th e ma in  me nu o n th e L C D. R ota te  th e b utto n to  ch oose...

 
 
6.3.8.1 Unloading the filame nt
 
 
Similar procedure to the lo adin g o pera tio n. 
​Preh eat
​ th e n ozzl e fo r m ate ria l  yo u u se d la st
 
time (pre assembled prin te rs  are  sh ip ped w it h  PL A).  W ait  fo r  te m pera tu re s  to  st abilize  a nd
 
use  ​Unload filament  ​option fro m  th e me nu.
 
6.3.9 First layer calibration  ​(kit on ly )
 
 
NOTE: The calibration pro cess  has  been ma de e asi er  and is  now  ca lle d V 2 C alib ra tio n. If
 
the  ​V2Calibration.gcode ​ is...

 
Observe the line which is  bein g e xt ru ded o n th e p rin t su rface . G o to  th e L C D m enu a nd
 
choose the  ​Live adjust Z ​ o ptio n. A  new  me nu w ill  sh ow  u p w here  yo u ca n tu ne th e n ozzl e
 
height live during the test  prin t. T he p oin t is  to  lo w er  th e n ozzl e u ntil  th e e xt ru ded p la st ic
 
sticks nicely to the bed an d yo u ca n se e it  is  bein g sl ig htly  sq uish ed. S et va lu e sh ould  n ot
 
exceed  -1 mm,  ​if you have to  a d ju st  it  m ore , m...

 
6.3.10.2 Check probe hei ght
​ (k it  on ly)
 
 
If the first layer seems  in co nsi st ent b etw een mu lt ip le  p rin ts,  th e p ro be m ig ht b e
 
too high. Lower it  sl ig htly  and try  again  
​Calib ra ti on XYZ
​. K eep in  m in d, th e p ro be
 
must be always hig her  th an th e n ozzl e tip , o th erw ise  it  w ill  ca tch  o n p rin ts.
 
 
 
Pic. 1 1 -  Pro be re sp onse  d ia gra m.
   
 
6.3.11 Securing of the probe (kit only)  
 
After couple of prints  id eally  se cure th e b otto...

 
7 Printing  
 
● Make sure that the 
​nozzl e
​ a nd th e b ed a re  h eate d to  th e d esi re d te m pera tu re . If yo u
 
forget to  ​preheat ​ th e 
​prin tin g
​  ​nozzl e
​ a nd th e b ed b efo re  
​prin tin g,
​ th e 
​ prin te r
​ w ill
 
automatically check th e te mp era tu re s of th e 
​ nozzl e
​ a nd th e b ed; 
​prin tin g
​ w ill  st art
 
when desired tempera tu re  is  re ach ed -  it  ca n ta ke  se veral  m in ute s.  H ow eve r, w e
 
recommend preheatin g th e 
​prin te r
​  b...

 
If your prints are stuck to o w ell  a nd d on’t  w ant to  se para te , try  usi ng a  
​den ta l f lo ss
​. S lid e a
 
dental floss under the cor ner  of th e o bje ct  w hich  yo u p re viousl y  se para te d b y  th e sp atu la  a  in
 
saw like motion ​ gently separa te  th e o bje ct  fro m  th e p rin t su rface . D enta l  flo ss  is  genera lly
 
covered in wax so the pri nt su rface  n eeds  to  b e 
​cle an ed  th oro ughly
​ b efo re  a  n ext  p rin t.
 
7.2 Printer Control  
 
There are...

 
 
7.2.2 Silent vs. Hi-power mode  
The printer offers two set tin gs  fo r  mo to r  pow er  co nsu mp tio n. Si le nt u se s le ss  curre nt a nd
 
makes the printer quieter , b ut le ss  pow erf ul.  H i-p ow er  is  gre at fo r ve ry  la rg e ( o ve r 2 00 g ra m )
 
prints and for freshly asse mble d ki ts  befo re  yo u fin e tu ne e ve ryt hin g. If yo u e xp erie nce  lo st
 
steps (shifted layers) or if  yo u’re  ma nually  adju st in g sp eed o f p rin tin g to  m ore  th an 1 00% ,
 
use...

 
 
1. Press and release th e r e set  butto n
​ (ma rked X  and p osi tio ned u nder th e co ntr o l
 
knob on the LCD panel)
 
2. Press and hold the c o ntr ol k n ob
​ u ntil  yo u h ear  a b eep
 
3. Release the control k n ob
 
4. Immediately press a n d h old  th e c o ntr ol k n ob
​ u ntil  yo u h ear a  d ouble  b eep
 
5. Release the control k n ob
 
 
When done correctly, the  p rin te r  LC D w ill  sh ow  th e la nguage se le ct io n.
 
 
7.2.4 LCD layout  
Items ​ not mentioned b elo w  a...

 
❏ Calibration  
❏ Selftest  
❏ Calibrate XYZ
 
❏ Calibrate Z  
❏ Mesh Bed L eve lin g
 
❏ Auto home  
❏ Bed level correct
 
❏ Show end st ops
 
❏ Reset XYZ calib r.
 
❏ Settings  
❏ Temperature
 
❏ Nozzle
 
❏ Bed
 
❏ Fan sp eed
 
❏ Move axis  
❏ Move X
 
❏ Move Y
 
❏ Move Z
 
❏ Extruder
 
❏ Disable steppers
 
❏ Mode - Power  / Si le nt
 
❏ Live adjust Z
 
❏ Select language
 
❏ Statistics  
❏ Support  
❏ prusa3d.com
 
❏ forum.prusa3d.co m
 
❏ howto.prusa3d.co m
 
 
   
29
  

 
7.2.5 Print speed versus print quality  
Printing a small object tak es  a fe w  mi nute s,  b ut p rin tin g la rg er  mo dels  is  tim e co nsu min g -
 
there are prints taking tens  of h ours.  T he o ve rall  p rin tin g time  ca n b e ch anged b y  dif fe re nt
 
ways. First way to alter th e p rin tin g sp eed is  ch angin g la ye r heig ht in  S lic3 r -  u pper r ig ht
 
windows shows Print setti ngs  optio n. D efa ult  se ttin g is  0.2 0 mm  (N O RM AL), yo u ca n sp eed
 
up the printer by...