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Installation manual extruder upgrade for Bondtech_Prusa_i3 V1.1                          

 

●  Insert three M3 screws and 

loosely tighten them using a 
2.5mm Allen key.  
 

 

M3x8 

 

M3x12 

 

M3x25 

 

●  Insert a ball bearing. Ensure it is 

fully pressed down into the slot.  

 

 

●  Insert the shaft with the white 

plastic gear into the bearing.  
Rotate the shaft to ensure correct 
alignment of the gears. 
 

 

 

  Tighten the screws with 

reasonable force. 
 

 

Important: Be careful 
when tighten the M3x12 
screw to avoid damaging 
the pocket!

 

Summary of Contents for Extruder upgrade

Page 1: ...Bondtech for Prusa i3 Assembly and installation manual This work is licensed under a GNU General Public License v3 0...

Page 2: ...e Ward Sando Bendig Vecko Kojchevski Vecko Extruder Steven M lby that have provided excellent feedback and suggestions of how to develop the perfect extruder setup for the Prusa series printer A lot o...

Page 3: ...usa i3 1x PTFE tube 80mm 1x SLS printed Extruder front 1x SLS printed Extruder rear 1x Bag with screws and bolts 1x Fan shroud 1x Mounting bracket MK2 MK2s MK2 5 and MK3 without BMG 1x Nema17 Pancake...

Page 4: ...ommended Download and print out Bondtech s PTFE fixture for precise measurement of the tube length STL file available at https github com BondtechAB Bondtech_Prusa_i3 tree master CAD Files Preparation...

Page 5: ...otor gear onto the shaft as oriented in the picture Leave a 1 1 5 mm gap between the gear and the motor and tighten it using your 1 5mm Allen key Recommended Use Loctite to secure the screw Assembly t...

Page 6: ...en key M3x8 M3x12 M3x25 Insert a ball bearing Ensure it is fully pressed down into the slot Insert the shaft with the white plastic gear into the bearing Rotate the shaft to ensure correct alignment o...

Page 7: ...it down using a primary drive gear If you are using the bear X carriage remove hex cover plug by pushing it from the rear side This hole is for a M3 nut Press the primary drive gear down until the gr...

Page 8: ...ith the filament path Recommended Use Loctite to secure the screw Important If the setscrew is not properly aligned with the flat surface it will stick out and start grinding on the secondary drive ge...

Page 9: ...the hinge as shown in the photo and press the shaft down until you hear the click Carefully press the shaft in place using your 2 5mm Allen key Put a small dab of lithium based grease on the gear sec...

Page 10: ...of the ends according to Prusas recommendation using a knife or a razor Using this fixture will help Credits to Olof Ogland Insert the newly cut end of the tube into the HotEnd Cut the tube 6 3 mm fro...

Page 11: ...the tube fall into the HotEnd we recommend you remove the tube before chamfer the inside Insert a push fit clip between the HotEnd and the collet Recommended Add a small piece of tape 5x20mm on the in...

Page 12: ...excessive force Install the extruder to your X Carriage using three M3 screws M3x40 M3x45 Important These screws are sized to use on your stock MK2 5 MK3 carriage or the modified MK2 s carriage If you...

Page 13: ...o the pockets of the mounting bracket Install the mounting bracket and fan shroud using two M3x10 screw M3x10 Place two hex nuts into the slots on the mounting bracket and slide your 5015 blower fan d...

Page 14: ...improve air flow and reduce turbulence Check out his work here MK2 5 MK3 users insert a square nut into the right slot MK2s in the left as shown earlier Secure the P I N D A using a M3x16 screw Square...

Page 15: ...Installation manual extruder upgrade for Bondtech_Prusa_i3 V1 1 14 Place the sensor cover on top and fasten it using two M3x8 screws...

Page 16: ...s 16 bit microstepping on MK3 it shall be 830 as it uses 32 bit microstepping this is valid for standard 1 8 degree stepper motors if a 0 9 degree motor is used the E step needs to be doubled so 830 a...

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