This guide assumes you have a printer already running RepRapFirmware. It will talk through the steps for adjusting the firmware settings for the Titan Extruder.
If you do not yet have RepRapFirmware installed on your Duet then see the Duet3d wiki: https://duet3d.com/wiki/Duet_Wiki
You can edit your existing firmware either through the online configuration tool, or through DuetWebControl
If you download a fresh version of RepRap Firmware you'll have to configure more settings than the ones mentioned in this guide so that it will work well with your printer.
1. Flip the corresponding line in the file:
config.g
from:
S1 to S0
or vice versa:
M569
You can also simply send the:
M569
command through your favourite printer control software or through Duet Web Control.
2. The next thing we'll have to update is your printer's E-steps-per-mm.
Your slicer will generate G-Code for your printer, which will tell it to extrude a certain length (in millimeters) of filament. Your printer takes those lengths of filament and calculates how much it should rotate your Titan's stepper motor to push out the expected amount filament. This number is used to make that conversion
Start with a ball-park estimate of your E-steps-per-mm, and then we'll fine-tune it.
If you're using the standard Titan Slimline motor, start with:
837 Steps-per-mm
3. Over USB Connection or Duet Web Control
Use a printer control software to connect to your printer. Send the command
M92 E<your number here>
to your printer.
Then, send:
M500
to store your settings
Update your:
config.g
file manually:
Update the following line with your new number:
M92
4. To get a more exact value for your E-steps-per-mm, measure the exact amount of filament that is pushed out of your extruder.
5. Load filament into your extruder, just until it is gripped by the drive shaft (you can't pull it out without moving the large gear turning)
6. Mark your filament at the top of the idler arm or PTFE tubing with a pen or permanent marker.
7. Tell your printer to extrude 100mm of filament. Use your printer's LCD screen, or send:
G92 E0
then:
G1 E100
via your printer control software.
You may need to heat your HotEnd before your printer allows you to extrude filament. You can use M302 command to get around that.
8. Mark your filament again at the top of your idler arm or PTFE tubing
9. Eject your filament.
10. With a ruler or callipers, measure the distance between the two marks on your filament.
If the distance wasn't exactly 100mm, use a proportion to calculate a more precise E-steps-per-mm value.
11. Enter that new value into your firmware or EEPROM as you did before.
12. Once you have established the correct steps per mm then update:
config.g
with the correct number:
(M92 <correct E steps> )
If you're having issues, check with your printer's manufacturer.
If you're unsure of how to update RepRapFirmware, see https://duet3d.com/wiki/Using_DuetWebCon...