I think this would be a great addition. Companies like colorFabb specify the 'length' of the filament they sell so basically a counter that 'adds' every extruder move and provides this data in object model would work I believe. What do you think @dc42 ?

Thanks for the answers

I've ordered the 24VPSU, Heating cartridge and the fans but they won't be arriving until next month. I'll check it with them as well..

I was planning to switch due to resume-after-power-loss but it seems I gotta do it sooner

I'll try increasing the current and check again

ReprapCalculator shows this results for 15 mm:

Approximate peak back EMF due to rotation per motor: 10.3 V at 15.0 mm/s
Approximate peak back EMF due to inductance per motor: 10.1 V at 15.0 mm/s

So, does it mean I'm OK with 11 V supply, or do I need 10.3+10.1 = 20.4 V supply? If second then 10mm/sec is absolute limit for me (it shows 6.9 + 6.7 = 13.6 - exactly at the limit)

Hello all

I've just migrated my extruder setup and started using Flex3Drive system.

I'm using this OMC NEMA17 pancake stepper motor : https://www.omc-stepperonline.com/de/nema-17-bipolar-1-8deg-13ncm-18-4oz-in-1a-3-5v-42x42x20mm-4-drahte.html
I'm using 13.6V as power source input with SSR for bed heating - so I think PSU handles everything just fine.

I'm using the Duet Wifi with the latest Duet Firmware (2.03) with Duex5 board (the motor is connected to Duet though).

Here is my config:

M350 E8 I0
M350 X16 Y16 Z16 I1                                                     ; Configure microstepping with interpolation
M92 X80.00 Y80.00 Z800.00 E1900                                         ; Set steps per mm flex3drive
M566 X900.00 Y900.00 Z60.00 E6.00                                       ; Set maximum instantaneous speed changes (mm/min)
M203 X10500.00 Y10500.00 Z600.00 E2400.00                               ; Set maximum speeds (mm/min)
M201 X1200.00 Y1200.00 Z300.00 E120.00                                  ; Set accelerations (mm/s^2)
M906 X1000.00 Y1000.00 Z900.00 E400.00 I35                              ; Set motor currents (mA) and motor idle factor in per cent

When I tell the extruder to move with 10 mm/sec or below, no problem there; however when I try to move them with 15mm/sec, motor rotates but I get 'Motor phase A disconnected' and 'Motor Phase B disconnected' warnings; at least twice in a 100mm extrusion.

Since Flex3Drive uses high gearing, it's very hard to see if motor is skipping steps or something but I was wondering why could I be getting these warnings; how can I make them go away etc.

How does chip detect this situation?

Another thing is: when I make 100mm extrusion with 1 mm/sec speed, it generally extrudes about 85 mm - this seems very low to me. Could the motor be skipping indeed?

I only used this motor with Titan extruder before and it seemed OK to me but I'm no motor expert so I wouldn't know. And before you asked: it doesn't make weird noises or anything when running.