Extrude from firmware vs from Octoprint - different amounts actually extruded?

[sleake]

Description

After installing Jyers, the amount extruded for any given extruder e-step value is different if I do the extrusion from the printer menus or if I do it from the Octoprint web interface. This was not an issue until I installed this firmware.

Equipment/Versions

• Ender 3 v2 (4.2.7 main board) w/BL Touch
• Jyers 2.0.1 (E3V2-BLTouch-5x5-HS-v4.2.7-v2.0.1)
• Octopi 0.18
• Octoprint 1.8.6

Steps to Reproduce

1. On the printer, set extruder e-steps to 145
2. On the printer, extrude 100mm.
3. From Octoprint, extrude 100mm from Command/Control Extrude button.

Expected behavior: Both should extrude the same amount.

Actual behavior: Executing from the printer extrudes 101mm. Executing from Octoprint extrudes 87mm.

Additional Information

I have tried this with many different values and they never match. When I set the e-step value on the printer, before I extrude using Octoprint I use the M92 command to confirm it is the same value. I can't come up with anything that would cause this.

[An-Untitled-Developer]

It's a token stealer.