Extrusion issues

kmhudgins

Hi,
im having some issues with extrusions that does not make much sense to me. when i send a command to extrude 100mm at a rate of 1mm/s my actual extruded material is 156.04mm. When i do the same thing at 5mm/s my actual extrusion is between 60mm-70mm. i have all standard equipment except for the duet 2 maestro board and a bl touch both of which i recently installed and finaly got working yesterday. Any help would be appreciated.

thank you

Phaedrux

It's possible that your esteps are off enough to explain the first result, and if the temperature of the hotend isn't high enough, that could explain the second results. Extruding at 5mm/s is quite fast.

Without further details it's hard to say much else.

kmhudgins

thank you for the input. im trying to tweak my esteps but i am getting very inconsistent numbers

peter247

What extruder do you have and stepper motor do you have ?
I would say that printing slow you are just over extruding because your steps per mm are too high or low ( I will have to think about that one), have you set it up for the wrong stepper motor ? eg 0.9deg motor when it`s a 1.8deg motor so if you extruded very slow you would get 200mm.
AND when you try to print too fast your extruder rips into the filament and slips, too much pressure at the nozzle with twice the correct amount.

dc42

@kmhudgins, when you extrude at 5mm/sec, does the extruder motor skip steps?

Are you certain that your hot end thermistor is set up correctly in the M305 P1 command in config.g? Perhaps the nozzle is not as hot as you need it to be able to extrude at 5mm/sec.

kmhudgins

@peter247 I will look in to the stepper moters a am not sure i got the data for the set up form someone else. so i will verify that.

kmhudgins

@dc42 yes it does. as fare as my g code goes the heater g code is shown below i am completely new to the working with g code and am not sure if it is correct or not
; Heaters
M305 P0 T100000 B4138 R2200 ; Set thermistor + ADC parameters for heater 0
M143 H0 S120 ; Set temperature limit for heater 0 to 120C
M305 P1 T100000 B4138 R2200 ; Set thermistor + ADC parameters for heater 1
M143 H1 S280 ; Set temperature limit for heater 1 to 280C

Veti

those are the default configurator settings and are therefore almost certainly wrong.
what thermistors do you have?

kmhudgins

@veti I am not sure. what ever comes on the ender 3 pro.

Veti

@kmhudgins
see
https://duet3d.dozuki.com/Guide/Ender+3+Pro+and+Duet+Maestro+Guide+Part+1:+Wiring/37?lang=en
https://duet3d.dozuki.com/Guide/Ender+3+Pro+and+Duet+Maestro+Guide+Part+2:+Configuration/38?lang=en
https://duet3d.dozuki.com/Guide/Ender+3+Pro+and+Duet+Maestro+Guide+Part+3:+Commissioning/39?lang=en
https://duet3d.dozuki.com/Guide/Ender+3+Pro+and+Duet+Maestro+Guide+Part+4:+Calibration/40?lang=en

kmhudgins

@veti thank you im running through those right now

peter247

@kmhudgins If you are using this page to set up :-

https://e3d-online.dozuki.com/Guide/Titan+Aero+RepRap+Firmware+Configuration/41?lang=en

this is o.k for a stepper motor with 400 steps per turn eg 0.8 deg , BUT you may have and most likely have a 200 steps 1.8 deg motor , so for a start half than 840 steps per mm

kmhudgins

Thank you i got the extrusion issues fixed i believe thanks for all the help everyone

Phaedrux

What did it end up being?

kmhudgins

@phaedrux my esteps were way off i used a profile that some one else set up and it did not seem to work very well for me. so I fallowed the configuration guide the duet has and was able to get much closer to the actual number. with a little more tweaking i have gotten the esteps to a acceptable standard