Yes I think there is a firmware bug. The min and max values should be more like 80% and 120%.

Calibration needs to know how your whole system behaves, includinging retractions. That's why it's best to use a real print to calibrate. You can easily create a calibration file to print if you just want to test simple extrusion moves, e.g.:

G1 X0 Y0 Z10 F5000
M83
G1 X100 E100 F240 ; extrude 100mm at 4mm/sec
G1 X0 E100 F240 ; extrude 100mm at 4mm/sec

Make sure you do X or Y movement as well as extrusion so that the firmware treats it as a printing move.

Thank you dc42 for the tip found the thread on reddit and already contacted e3d support , I am waiting for a replacement meanwhile I am using a printed one.

Thank you very much .. that will help a lot .. hopefully someday we'll be able to use the DueX5 endstops as well.

This will give me enough as I've read the GCodes on the wiki several times to at least give some points to experiment with.

I'd agree that if all printer setups allowed mounting the monitor as well as this, it would work consistently well, but trying to balance it above a remote direct drive extruder on a delta effector, not quite so straightforward.

thank you for your clarifications, I made new connection of all sensor cable

Thanks for the update. That distance is quite critical as you say and any slight variations in print quality of the printed parts will have an effect.

Neat. Thanks for the response.

I've added a section describing the protocol at the bottom of the wiki page.

I'll try next time there is an issue as I haven't yet had a play with the resume feature.

The feedback - you're very welcome, thanks for the filament sensor.

Thanks Tony, I'm taking it off and looking at it now.

Okay so the mount broke, it's too thin, in the area of the ring that attaches it to the Nimble under the drive cable. So I have added a spar to see if it helps and will try it again. Will post it if it works.

Okay so i gave it test, reached in and undid the idler. After around 3-4 seconds it went to pause and displayed:

I re-tensioned the idler and hit resume and maybe missed around 1/4 of a layer of infil on a 20x20 cube, so quite recoverable.

It does work.

The filament monitor uses a relatively simple protocol to send the angle to the Duet every 50ms or so. I have not written up the documentation for the protocol yet, once I do then you could use a MCU to interface any encoder to the Duet using this protocol.

moved to the filament monitor forum. More to follow about the beta tests.