Gina

The weirdness continues!! It started with a skirt of about the right size then started printing the main 20mm cube 110mm high Speed is better. X print spacing is more like 1.8mm than 0.3mm.

Designed a 20mm cube and uploaded it to the Duet - currently heating up.

I did try a block but that was a while back. I'll try a small cube.

Been analysing the situation. The hardware must be alright because all the axes move correctly from individual commands and also homing and bed probing. The gcode file seems alright as it is prints fine on my Titan. That leaves the Duet. It would seem that the gcode is somehow incompatible with the Duet - there must be differences between the Duet and RAMPS etc. plus Marlin. Maybe a different host app and slicer.

Trying that gcode on my Titan printer - currently heating up... Later - printing fine on the Titan.

config.g ; Configuration file for Duet WiFi (firmware version 1.20 or newer) ; executed by the firmware on start-up ; ; generated by RepRapFirmware Configuration Tool on Mon Jan 15 2018 15:49:12 GMT+0000 (GMT) ; General preferences M111 S0 ; Debugging off G21 ; Work in millimetres G90 ; Send absolute coordinates... M83 ; ...but relative extruder moves M555 P2 ; Set firmware compatibility to look like Marlin ; Automatic saving after power loss is not enabled M667 S1 ; switch to CoreXY mode *** Gina added M208 X0 Y0 Z0 S1 ; Set axis minima M208 X190 Y190 Z240 S0 ; Set axis maxima ; Endstops M574 X1 Y1 S0 ; Set active low endstops ********** Gina added M574 Z1 S2 ; Set endstops controlled by probe M558 P4 H7 F600 T6000 I1 ; Set Z probe type to unmodulated and the dive height + speeds *** I1 added speed 600mm/min G31 P500 X24 Y0 Z1.3 ; Set Z probe trigger value, offset and trigger height M557 X25:165 Y15:175 S70 ; Define mesh grid ; Drives M667 S1 ; switch to CoreXY mode *** Gina added M569 P0 S0 ; Drive 0 goes forwards M569 P1 S0 ; Drive 1 goes backwards M569 P2 S1 ; Drive 2 goes forwards M569 P3 S0 ; Drive 3 goes backwards M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation M92 X62.45 Y62.45 Z401.02 E209.25 ; Set steps per mm ********************** 418.50 was 783.53 M566 X1200 Y1200 Z12 E120 ; Set maximum instantaneous speed changes (mm/min) *************** M203 X6000 Y6000 Z900 E1200 ; Set maximum speeds (mm/min) M201 X500 Y500 Z250 E250 ; Set accelerations (mm/s^2) ****************** M906 X1000 Y1000 Z1000 E1400 I30 ; Set motor currents (mA) and motor idle factor in per cent M84 S30 ; Set idle timeout ; Heaters M305 P0 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 0 M143 H0 S150 ; Set temperature limit for heater 0 to 150C M305 P1 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 1 M143 H1 S300 ; Set temperature limit for heater 1 to 300C ; Tools M563 P0 D0 H1 ; Define tool 0 G10 P0 X0 Y0 Z0 ; Set tool 0 axis offsets G10 P0 R0 S0 ; Set initial tool 0 active and standby temperatures to 0C ; Network M550 P"GinaRep Mini" ; Set machine name M552 S1 ; Enable network ;*** Access point is configured manually via M587 M586 P0 S1 ; Enable HTTP M586 P1 S0 ; Disable FTP M586 P2 S0 ; Disable Telnet ; Fans M106 P0 S0.3 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off M106 P1 S1 I0 F500 H1 T45 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned on M106 P2 S1 I0 F500 H1 T45 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned on ; Custom settings are not configured gcode coming shortly... Test Ring 100mm OD 2mm thick 10mm high 02.gcode

I would very much appreciate any help or suggestions as to what might be wrong. I expect to get a solution to this as has happened with seemingly insoluble problems in the past. I can't believe this is the fault of the Duet with so many others using it quite satisfactorily. At least today hasn't been a total loss - I've sold my last 460EX astro camera and took it to the Post Office to send to the buyer - another £1,300 for the funds Trying to be positive

As an experiment I've let the print continue for longer having halved the extrusion rate to save filament (though this is the very cheap ABS at about £4 a Kg). The printing speed is continually decreasing from a start which might be tolerated but now, after some 10m, it's got down to a crawl with it needing several seconds watching to be able to see any movement at all. How weird is that!!! Perhaps even more oddly (or maybe not) is that the extrusion rate seems to have been the same throughout the print. It's only the XY speed that seems to have decreased or indeed to be far less than it should be. Can't say about the Z as I haven't got past the first layer.

Homing and bed probing faster but no change in printing Had a thought re. extruder motor calibration. The Titan uses the same extruder so I've taken the steps/mm for that and put it in the Duet. It's a fair bit lower. OK slightly less extrusion but otherwise no change. The problem remains!!!

Found out why the Y homing was slow - the acceleration was set to 20 whereas the X was set to 500. They should be the same for CoreXY so I've increased the Y to 500 too. I guess the low Y value was for Y moving beds. Let's see what happens now...

Reduced printing speed to 4mm/s for the first layer and the speed is only slightly faster 5.5m instead of 7m to get to the same place. The print is pretty much the same. Far too much extrusion but that might be calibration though that was from calculation which has proved alright in the past.

Here's the print after 7m.

Taking printing speed right down to 10mm/s and trying again. Not that this can be the problem - I mean how can reducing the printing speed set in the slicer increase the printing speed - it nuts!! Something is wrong somewhere.

Here's the print - stopped after 13m.

It's weired, I've reduced the speed from 23mm/s to 16mm/s and it's printing a bit faster. Also increased the extruder motor current to 1.4A but it's still skipping though not as much.

Printing is still incredibly slow but it doesn't seem to be producing a wide brim now. Extruder motor still skipping.

Re-sliced it with CuraEngine making sure Adhesion Type was set to None. This is the result of opening the .gcode file in Cura.

It needed opening from within Cura rather than choosing Cura as application to use to open the file. Here is the ring gcode file in Cura. Seems to have acquired a very wide brim.

This is the STL file in Repetier Host.

Downloaded Cura but it won't open *.gcode files. Or do you mean the *.stl file?

Hmm... can't find Cura - maybe it was on my Win 7 desktop that died. I'll see if I can download it.

I can use Cura as a strand alone slicer.

Here a photo of the print as far as I went. This was 16 minutes printing time.

Tried a square now trying a circle/ring - Test Ring 100mm OD 2mm thick 10mm high With this print the machine is running incredibly slow again and the extruder is skipping. There is something very strange going on. The Duet has been set to be Marlin compatible so slicers that produce standard Marlin compatible G-code should work fine with the Duet. I guess I must be doing something wrong but what!?

Something very strange going on here!! Designed a test model in SketchUp - 100mm square 3mm thick and 20mm high as shown in the screenshot (1st pic) the photo shows the result of printing part of the first layer. Some distortion due to camera angle but doesn't explain printing a 3mm wide side as around 15mm!!