Calibrating the FlexΒΆ

Because of the gear ratio inside the Flex, the steps per millimeter are a lot more than your usual number.

Note

Start with 2700 steps/mm with a 1.8deg stepper and 1/16 microstepping

The Flex has a nice flat surface you can use to set the ruler on, when measuring the filament, simply place it on top of the half circle on top of the Hobbit. Use a light coloured filament, place it in the breech, heat up the hot end and start the process.

  • Measure 100 mm on the filament, by holding the filament against the ruler while the ruler stands on the breech block ears.
  • Mark the distance with a permanent marker.
  • Extrude 50 mm using the firmware controls.
  • Measure the remaining length to the mark made.
  • Calculate the new number of steps/mm using the following formula:

Note

New steps = current steps * 50/actual mm extruded (50 being the 50 mm of filament you wanted to extrude.)

  • enter the new value in your firmware settings.
  • Do the whole sequence again, to confirm that the steps per millimeter are now set correctly.
  • if not, recalculate and re-confirm.

Done! All the tuning and calibrations are done. You are now ready to start using the Flex, so go to the Using the Flex page or click Next.