Introduction
Product Page
This Guide relates to this Prusa Mini Upgrade Kit:
https://www.bondtech.se/en/product/bondt...
Acknowledgements
This is a co-development work with Olof Ogland that came up with the initial idea and design.
Compatibility
This upgrade is compatible with the following machines:
Prusa Mini
You will need :
Parts
No parts specified.
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Select Filament.
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Select Unload Filament.
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Select the material you have loaded.
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The Prusa Mini will start by heating up the hotend.
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After reaching the desired temperature it will unload the filament.
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After unloading is finished, pull the filament out of the PTFE tube.
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Select Settings.
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Select Temperature.
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Select Nozzle.
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Turn the knob clockwise to increase the temperature.
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Press the knob once you reach 280 degrees.
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Wait for the nozzle to reach temperature
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Use an Adjustable Spanner or 16 mm wrench spanner to hold the block in position.
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Use a 7 mm socket with a torque wrench to release the tension of the nozzle.
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Select Settings
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Select Temperature
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Select Cooldown
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Use the 2.5 Hex Key to unscrew these 2 screws.
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Move the MINDA holder out of the way.
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Use the 1.5 Hex Key to untighten this screw.
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Use the 2.0 Hex Key to untighten this screw
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Use the Adjustable Wrench to keep the heatblock from moving to avoid damaging the heater and thermistor.
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if you find trouble removing the Heater and Thermistor Cartridges because they are stuck...
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... unscrew the bolt that holds the bundle of cables just above the hotend cooling fan.
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This will allow you to extend the Heater and Thermistor cables and easily remove the Hot Block and Heat Break from the Heatsink together with the Heater and Thermistor Cartridges.
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This gives you more room to take the cartridges out, and will also be quicker and easier to assemble it back with the Bondtech Heatbreak, in case you bought it.
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Grab the heatblock with an adjustable pliers or your hand to avoid damage the heatbreak.
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Use the 2.5 Hex Key to push the heater cartridge out.
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Use the 2.5 Hex Key to push the thermistor cartridge out.
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Grab the PTFE coupler with the Prusa Mini Wrench.
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Use the Adjustable Spanner to release the tension of the PTFE coupler nut.
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Finish unscrewing the coupler nut using your fingers.
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Detach the bowden tube from the feeder.
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Use the Prusa Mini wrench to remove the PTFE coupler from the heatsink.
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Use the 1.5 Hex Key to untighten these 3 screws.
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Grab the heatblock and pull the heatbreak out of the heatsink.
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Remove the old heatbreak from the heatblock.
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Fully tighten the nozzle by hand rotating it clockwise.
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Unscrew the nozzle half a turn by hand rotating it counteclockwise..
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Take the Bondtech Heatbreak and tighten it towards the nozzle.
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Apply thermal paste to the heatbreak to increase the thermal conductivity between the heatbreak and the heatsink.
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Locate the heatsink hole for the heat-break.
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Insert the heat-break inside.
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Push it all the way up.
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Hold the hotend with your fingers to prevent the heat-block from falling.
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Use a cotton bud to remove the excess past.
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Rotate the heat-block and heat-sink clock and anti-clockwise to spread the paste evenly.
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Tighten these 3 set-.screws to secure the heat-break and heat-block in place.
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Notice the PTFE tube end with the chamfer.
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Insert the PTFE tube inside the heat-break, chamfer side down.
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The tube will lay in position after released.
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Take the PTFE tube coupler.
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Use a 1.5 hex key to align the coupler with the PTFE tube.
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Hold the hotend firmly before tightening the coupler.
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Use the Prusa Mini wrench to tighten the coupler.
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Take the coupler nut and bowden tube and insert it inside the coupler.
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Start tightening the nut using your fingers.
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To tighten the coupler nut use a combination of spanner and wrench to immobilize the coupler while you twist the nut.
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Insert the thermistor cartridge in the heat-block.
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Push it until it flushes on the opposite side.
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Insert the heater cartridge inside the heat-block.
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Push it through and give the heatblock support with your fingers to avoid bending the heatbreak.
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Use a 2.5 hex key to tighten the heater cartridge set screw.
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Use a spanner to prevent the heater block to rotate while you firmly tighten the set screw.
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Use a 1.5 hex key to tighten the thermistor cartridge set screw.
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Use a spanner to prevent the heater block to rotate while you firmly tighten the set screw.
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Reposition the MINDA mount.
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Align these 2 screws with the holes on the hot-end.
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Push both in.
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Tighten lightly the screw on the heat-block side.
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Tighten lightly the screw on the opposite side.
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Adjust the heater cables so they can flow parallel before fully tightening the mount.
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Select Settings.
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Select Temperature.
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Select Nozzle
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Use an Adjustable Spanner or 16 mm wrench spanner to hold the block in position.
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Use a 7 mm socket with a 1.5 Nm torque wrench to firmly tighten the nozzle.
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Release the MINDA using this screw.
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Lower the X-axis all the way down until the nozzle touches the print-bed.
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Fold a A4 sheet of 80mg/m paper in half 3 times, until you have 8 sheets of thickness.
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Insert the folded sheet of paper below the MINDA.
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Press the MINDA down against the paper.
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Tighten the screw to set the MINDA mount in that position.
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Choose Calibration.
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Choose First Layer Calibration
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Choose NEXT.
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Choose the material you have loaded, or PLA if none.
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Choose NEXT.
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Wait until the temperature reaches the target to choose NO.
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Choose NEXT.
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Choose Print.
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Select file SET_PID_VALUES.gcode
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Choose Print.
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After that time choose Stop.
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Choose Yes to confirm you want to stop.
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