New beta firmware 1.20.1RC2 and DuetWiFiServer 1.20+1

dc42

I have just released these. All the binaries are now available via https://github.com/dc42/RepRapFirmware/tree/dev/EdgeRelease (follow the link to the one you want, then press Download). From the whatsnew file:

New features:

Added support for nonlinear extruder drives (M592)
M591 D# response now includes the measured steps/mm and tolerance

Bug fixes:

When a simulated print ends or is cancelled, stop.g, sleep.g and cancel.g are no longer run
Fixed a 1-step error in the commanded extrusion amount that the filament sensor compares with the measured extrusion

The new DuetWiFiServer release uses a more recent ESP8266 SDK and generates more debug information.

Please report good, bad or neutral feedback on this release here. Unless any serious bugs are reported, these binaries will be re-versioned as 1.20.1 by the end of this week.

DjDemonD

Installed both, Wifi_server did not require any messing around, just updated via DWC without issue.

dc42

Thanks!

garyd9

Link in the original post isn't working properly. It's actually point to "…github.com/dc42/RepRapFirmware/" when I think it should be pointing to "...github.com/dc42/RepRapFirmware/tree/dev/EdgeRelease"

(Both strings modified to prevent the forum software from messing with them)

burtoogle

Hi David, I have been trying out M592 and it doesn't seem to have any noticeable effect.

I simply do G1 E100 Fxxx for various speeds (60, 120, 180, 240, 300 and 360) and measure the lengths of filament that are moved. With M592 values set to zero I get the expected results: as the feedrate goes up, the extruded length goes down. If I then apply M592 D0 A0.015 B0.0012 (your example values in the other thread), I get no noticeable change (given a small margin of measurement error). I then used larger values of A (up to 0.12) and still see no difference in the extruded lengths.

I am only moving the extruder, there's no x/y/z movement.

roboduet

@burtoogle:

I am only moving the extruder, there's no x/y/z movement.

As far as I remember you have to move other axes too.

Upd:

Nonlinear extrusion is not applied to extruder-only movements such as retractions and filament loading.

burtoogle

Ah, silly me, I will try again tomorrow. What would be the easiest bit of gcode to enter that includes a little carriage movement? Basically, I want to extrude 100mm every time at a known rate, I don't really care how far the carriage moves (as long as it's not far)

roboduet

@burtoogle:

What would be the easiest bit of gcode to enter that includes a little carriage movement?

[[language]]
M83
G1 Z0.1 E100

garyd9

@dc42:

When a simulated print ends or is cancelled, stop.g, sleep.g and cancel.g are no longer run

Confirmed fixed. No other differences noted. One issue that might be old (cosmetic) or even a non-issue: When simulating a print, the web control "print status", directly above the progress bar, shows "printing xxxx.gcode" on the left, and on the right, it shows "Layer 0 of …" (the issue being that it's always showing that it's working on layer 0 while simulating.)

dc42

@garyd9:

Link in the original post isn't working properly. It's actually point to "…github.com/dc42/RepRapFirmware/" when I think it should be pointing to "...github.com/dc42/RepRapFirmware/tree/dev/EdgeRelease"

Thanks, now corrected.

dc42

@burtoogle:

Ah, silly me, I will try again tomorrow. What would be the easiest bit of gcode to enter that includes a little carriage movement? Basically, I want to extrude 100mm every time at a known rate, I don't really care how far the carriage moves (as long as it's not far)

I use this on my delta:

G1 X0 Y0 Z100 F5000
M83
G1 E5 F600
M400
M291 S3 R"Extrusion test" P"Press OK to start test"

G1 X50 E50 F60
M400
M291 S3 R"Measure extrusion" P"Measure filament taken at 1mm/sec extrusion, then press OK"

G1 X0 E50 F120
M400
M291 S3 R"Measure extrusion" P"Measure filament taken at 2mm/sec extrusion, then press OK"

G1 X50 E50 F1800
M400
M291 S3 R"Measure extrusion" P"Measure filament taken at 3mm/sec extrusion, then press OK"

and so on, doing 50mm X movement and 50mm extrusion each time, and increasing the F parameter by 60 each time. The F parameter specifies the XY movement speed, and since I am doing 50mm X movement and also 50mm extrusion, the extrusion speed will be the same.

burtoogle

Thanks, that script looks just the job, I will give it a go in the morning.

burtoogle

Hi David, using a script based on your example above, I obtained 50mm (within 1%) extrusion lengths for all speeds between 1 and 6 mm/S using the values A=0.016 and B=0.0010. This is for a Jhead hot end at 200C using rigid ink PLA and a Titan extruder. I will now see what effect it has on prints.

Here's the script in case anyone else wants to use it (set and stabilise hotend temp before calling)

G28
G1 X0 Y0 Z100 F5000
M83
G1 E5 F600
M400
M291 S3 R"Extrusion test" P"Press OK to start test"

G1 X50 E50 F60
M400
M291 S3 R"Measure extrusion" P"Measure filament taken at 1mm/sec extrusion, then press OK"

G1 X0 E50 F120
M400
M291 S3 R"Measure extrusion" P"Measure filament taken at 2mm/sec extrusion, then press OK"

G1 X50 E50 F180
M400
M291 S3 R"Measure extrusion" P"Measure filament taken at 3mm/sec extrusion, then press OK"

G1 X0 E50 F240
M400
M291 S3 R"Measure extrusion" P"Measure filament taken at 4mm/sec extrusion, then press OK"

G1 X50 E50 F300
M400
M291 S3 R"Measure extrusion" P"Measure filament taken at 5mm/sec extrusion, then press OK"

G1 X0 E50 F360
M400
M291 S3 R"Measure extrusion" P"Measure filament taken at 6mm/sec extrusion, then press OK"

G28

dc42

@burtoogle:

Hi David, using a script based on your example above, I obtained 50mm (within 1%) extrusion lengths for all speeds between 1 and 6 mm/S using the values A=0.016 and B=0.0010. This is for a Jhead hot end at 200C using rigid ink PLA and a Titan extruder. I will now see what effect it has on prints.

That's close to the values I use on my delta:

M592 D0 A0.015 B0.0012 L0.2 ; nonlinear extrusion

This is for a Titan extruder driving 1.75mm RigidInk PLA through an E3Dv6 at 200C. I haven't checked whether adjusting the arm force on the Titan affects these values.

Guyaros

Hi,

Where can I download the latest version of Duet Web Control?
currently, I am using DWC 1.20-RC3

I've just updated from 1.19 to 1.20.1RC2, also updated the DuetWifiServer to 1.20.1RC2.
after the update, I experienced frequent disconnections from DWC, and that's new because the 1.19 was very stable.
I think its too early to state that this is a firmware problem, because I only installed the new version an hour ago, so I will keep updating.

In case I will need to downgrade, can an I I downgrade from version 1.20.1 to 1.19 by just uploading the previous version binary files using the DWC?

Thanks,

deckingman

@dc42:

@burtoogle:

Hi David, using a script based on your example above, I obtained 50mm (within 1%) extrusion lengths for all speeds between 1 and 6 mm/S using the values A=0.016 and B=0.0010. This is for a Jhead hot end at 200C using rigid ink PLA and a Titan extruder. I will now see what effect it has on prints.

That's close to the values I use on my delta:

M592 D0 A0.015 B0.0012 L0.2 ; nonlinear extrusion

This is for a Titan extruder driving 1.75mm RigidInk PLA through an E3Dv6 at 200C. I haven't checked whether adjusting the arm force on the Titan affects these values.

What's the nozzle size? I ran some tests on my machine and posted the results here https://www.duet3d.com/forum/thread.php?pid=34447#p34447. I am seeing a difference between demand and actual at high speed over a 50mm continuous extrude, but it's much less that you guys are seeing. Also, increasing the extrusion multiplier isn't compensating for me.

dc42

Mine is 0.4mm. I reran my tests with the nonlinear compensation applied, and my 50mm commanded extrusion was then within 1mm for extrusion rates up to 5mm/sec. Previously it was 10% down at 5mm/sec. At 6mm/sec the extruder started slipping - which was not surprising, because it was applying 13.5% compensation, pushing the feed rate close to the 7mm/sec at which I observed slipping previously.

burtoogle

I have a mini Kossel with a jhead and a Kossel XL with a v6 (both 0.4mm nozzles) and the jhead beats the v6 for throughput hands down when squirting PLA so with the non-linear extrusion active it can achieve 50mm at 6 mm/s. I haven't tried 7 mm/s but I would expect it to start skipping.

Without the non-linear extrusion, I see around 10% loss at 5 mm/s.

peirof

Hi,

Where can I find info of nonlinear extruder?

burtoogle

The documentation for M592 is here: https://www.duet3d.com/wiki/G-code#M592:_Configure_nonlinear_extrusion