Bowden Cable Model: 1.75 mm or 3 mm
If your printer is not already running as a Bowden Cable set up – It can be with this awsome extruder. In this configuration the Flex Wheel is able to improve the performance of just about every exisitng printer.
With the Flex Wheel’s greater driving power and speed capabilities you can easily overcome the draw backs associated with Bowden Cables, that is, resistance and hysteresis encountered when the filament travels through the PTFE tubing system. How? I here you ask, well the Flex Wheel is unique, it is not reliant upon the problematic Hobbed Gear / Pinch type roller system.
The Bowden Cable set up will not reduce the available print envelope and volume of your printer.
The Flex Wheel will not slip on rigid or flex filament so you will you have the potential to get more speed from your printer, in fact the Flex Wheel has so much torque that in testing we tried to see how much weight the Flex Wheel could lift before the filament slipped, unfortunately the 1.75 mm PLA snapped at just over 10 kg’s before we found out.
For multiple hot ends models, you can always place 2 extruders side by side.
Printer Requirements and Things to Consider:
Attaching to printer frame –
The extruder unit has been designed to be attached directly to the frame of your printer, the backing plate has 2 x 5 mm holes ideally placed to allow the unit to be attached directly onto 20 x 20 t slot extrusion frame.
Alternatively a specialised bracket or plate can be printed to allow for suitable attachment (this bracket design will differ between printers).
The Flex Wheel aluminium backing plate includes 4 x additional 3 mm holes to allow for flexibility in the attachment of unique plates etc. See the Thingiverse page for specifications, designs and inspiration.
Cooling fan required –
Stepper motors can get hot during operational use. A cooling fan and heat sink are highly recommended to reduce heat transfer from the stepper to other parts of the extruder unit. A specialised bracket to hold the fan can also be printed design will be dependent upon individual machines, see thingiverse for inspiration.
PTFE tubing and couplings required –
The Flex Wheel comes equipped with M6 x 1.0 mm threaded holes to except standard threaded PTFE connectors. You may already have these or may be able to source locally, if not you can order them as part of the package plus high quality PTFE tubing.
Re-calibration of firmware –
The only change to your firmware required is the steps your extruder counts for the E steps.