Wanhao i3 duplicator

[darookee]

@Doowrednu Could you post your config.g? I have the conversion done, but I'm not sure about the stepper motor currents. I currently use

M906 X855 Y855 Z1080 E855
 

but they seem to be vibrating a lot. Currently printing my first piece, so I'm not sure if this is something that influences the quality…

[T3P3Tony]

Stepper motor currents need to be appropriate for the motor you are driving, those are every specific currents you have set there (855mA, 1080mA) do you know what model on stepper motors the duplicator uses

[darookee]

That guy did the math: http://www.hacking3d.com/2016/05/wanhao-duplicator-i3-v2-stepper-tuning.html and I checked the numbers on my motors and used the values he calculated, just to get started.
Now that my first print is finished I have to say it turned out better than I was expecting with all this jiggeling the motors did. It seems that I dialed the nozzle too far away from the bed so the first layer is a bit ugly, but the rest looks realy good.

[T3P3Tony]

Ahh I see, well the current setting you have are unlikely to be the cause of the jiggeling what setting are you using for M305?

[darookee]

My M305 look like this:

; Heaters + Thermistors
M305 P0 T100000 B3950 R4700 H0 L0	; Put your own H and/or L values here to set the bed thermistor ADC correction
M305 P1 T100000 B4388 R4700 H0 L0	; Put your own H and/or L values here to set the first nozzle thermistor ADC correction
 

But you probebly wanted to know about the M350 settings?

M350 X16 Y16 Z16 E16 I1             ; set 16x microstepping with interpolation
M92 X80 Y80 Z400 E98                ; set axis steps/mm
M350 X256 Y256 Z256 E16 I1          ; set 64x microstepping with interpolation and automatically
                                    ; update steps/mm accordingly
 
 

I probably need to delete the second M350, as the I1 does the same thing if I undetstand that correctly…?

[dc42]

I don't recommend setting x256 microstepping explicitly until we have implemented dynamically-varying microstepping. The reason is that the step rates required for even modest movement speeds are very high, for example 128Ksteps/sec per motor to obtain 100mm/sec on a typical machine using 1.8deg/step motors and 20 tooth GT2 pulleys.

[T3P3Tony]

Hi darookee yes, the last M command in config.g is the one which will be in effect.

[darookee]

I removed the second M350 and now have just the 1/16th with interpolation, I'll report back after a few tests…

[darookee]

After using this configuration for a few days now it seems fine. So it was probably the 1/256 steps…

[T3P3Tony]

Thanks for the update, good to know you got to the bottom of the issues and yes that makes sense.

If either/both of you get a chance to post the details of your upgrades into the " My Duet WiFi-controlled machine" examples forum that would be really appreciated:

Thanks!