Requested speed is not reached

dragonn

@puddingbaer91 They is something wrong with you machine or calibration procedure. My bowden is too about ~70cm and I only need 0.1 pressure advance.

PuddingBaer91

@deckingman said in Requested speed is not reached:

@puddingbaer91 said in Requested speed is not reached:

.........................my pressure advance value is: M572 D0 S1.624 .........................

S1.624! Seriously?

hey deckingman instead of only talking: how could i reduce the value? I have done the calibration posted here in duet forum and ended with this. So please tell me how to reduce

dragonn

You need to post more details of you printer and maybe some photos of it and the calibration process.

PuddingBaer91

okay here we go:

originally it was a TronXY X5S (coreXY) but i converted it to ultimaker machanics (cross slider) only thing that is original are some extrusions. Print area is about 330x330x350mm. The z-axis is driven by one motor coupled with a belt. Extruder is a geared ultimaker clone with double wheels. Also had a bondtech extruder but with this i also need these high values.

config.g: (config.g override contains only PID settings)

; Configuration file for Duet WiFi (firmware version 1.21)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool on Wed Oct 24 2018 17:07:50 GMT+0200 (Mitteleuropäische Sommerzeit)

; General preferences
G90 ; Send absolute coordinates...
M83 ; ...but relative extruder moves

M667 S0 ; Select Cartesian mode (Select CoreXY mode with S1)

; Network
M550 PTronMakerXY ; Set machine name
M552 S1 ; Enable network
M587 S"Fox 7390" P"" I192.168.1.69 J192.168.1.1 K255.255.255.0 ; Configure access point and IP addresses. You can delete this line once connected
M586 P0 S1 ; Enable HTTP
M586 P1 S0 ; Disable FTP
M586 P2 S0 ; Disable Telnet

; Drives
M569 P0 S0 ; Drive 0 goes backwards DD S1
M569 P1 S1 ; Drive 1 goes backwards DD S1
M569 P2 S1 ; Drive 2 goes forwards
M569 P3 S1 ; Drive 3 goes backwards
M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
M92 X80.46 Y80.46 Z400 E336 ; Set steps per mm (for pencake motor with bondtech: 830)
M566 X1200 Y1200 Z24 E3000 ; Set maximum instantaneous speed changes (mm/min) M566 X1200 Y1200 Z24 E300 gut: M566 X480 Y480 Z24 E300
M203 X18000 Y18000 Z2400 E2700 ; Set maximum speeds (mm/min)
M201 X3000 Y3000 Z100 E3000 ; Set accelerations (mm/s^2) M201 X3000 Y3000 Z100 E3000 gut: M201 X800 Y800 Z100 E3000
M906 X1200 Y1200 Z1200 E1200 I30 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Axis Limits
M208 X0 Y0 Z0 S1 ; Set axis minima
M208 X330 Y330 Z370 S0 ; Set axis maxima

; Endstops
M574 X1 Y1 S0 ; Set active low endstops

; Z-Probe
M574 Z1 S2 ; Set endstops controlled by probe
M307 H3 A-1 C-1 D-1 ; Disable heater on PWM channel for BLTouch
M558 P9 H5 F120 T6000 ; Set Z probe type to bltouch and the dive height + speeds
G31 P25 X0 Y-24 Z0.75 ; Set Z probe trigger value, offset and trigger height // Verringern von Z entfernt Bett von der Duese!
M557 X30:315 Y30:310 S59 ; Define mesh grid

; Heaters
M305 P0 T100000 B4138 C0 R4700 X2 ; Set thermistor + ADC parameters for heater 0 and remap it to channel 2
M143 H0 S80 ; Set temperature limit for heater 0 to 80C
M305 P1 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 1
M143 H1 S250 ; Set temperature limit for heater 1 to 250C

; Fans
M106 P0 S0 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

; Tools
M563 P0 D0 H1 S"Extruder" ; Define tool 0
G10 P0 X5 Y0 Z0 ; Set tool 0 axis offsets
G10 P0 R0 S0 ; Set initial tool 0 active and standby temperatures to 0C

; Automatic power saving
M911 S10 R11 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; Set voltage thresholds and actions to run on power loss

; Custom settings are not configured
;M671 X20:295:20:295:170:170 Y10:305:305:10:10:305 P8 ; adjusting screws at rear left (-15,190), front middle (100,-10) and rear right (215,190), thread pitch 8mm
;M572 D0 S0.268 ; Set pressure control for direct drive with bondtech
M572 D0 S1.624 ; Set pressure control for bowden with sanjiu
;M307 H1 A459.4 C167.2 D4.1 ; PID for Extruder
;M307 H0 A101.4 C1123.0 D10.0 B0 ; PID for Bed
;M592 D0 A0.015 B0.0012 L0.2 ; Nonlinear adjustment
M591 D1 P1 C4 S1 ; Enable E1 Endstop for filament run out detection
M581 E1 S0 T1 ; invoke trigger 1 when a falling edge is detected on the E1 endstop input
;M929 P"eventlog.txt" S1 ; start logging to file eventlog.txt
;M200 D1.75 ; set all extruder filament diameters to 1.75mm
;M207 S1.0 F2400 ; set firmware retraction 1mm with 40mm/s

For calibration i used this: https://forum.duet3d.com/topic/6698/pressure-advance-calibration with these settings:

#!/usr/local/bin/python

extrusion parameters (mm)

extrusion_width = 0.48
layer_height = 0.2
filament_diameter = 1.75

print speeds (mm/s)

travel_speed = 120
first_layer_speed = 20
slow_speed = 5
fast_speed = 60

calibration object dimensions (mm)

layers = 100
object_width = 90
num_patterns = 4
pattern_width = 5

pressure advance gradient (s)

pressure_advance_min = 0.0
pressure_advance_max = 0.4

center of print bed (mm)

offset_x = 165
offset_y = 165

after getting not good results i changed pa value min to 0.4 and pa value max to 0.8 and reprinted the test and so on..
here is a picture with pa value from 0 to 0.4:
https://photos.app.goo.gl/98dehNVkQ2d4naaP9

these test are with values around 1.6:
https://photos.app.goo.gl/h2qjDT6DFwfBaw3y5
the right one is the final where all segments (slow and fast speed) have nearly the same wall thickness

here are some pictures from the printer:
https://photos.app.goo.gl/NM5Zr6jgCv3cpNrV7

thank you very much

deckingman

@puddingbaer91 said in Requested speed is not reached:

@deckingman said in Requested speed is not reached:

@puddingbaer91 said in Requested speed is not reached:

.........................my pressure advance value is: M572 D0 S1.624 .........................

S1.624! Seriously?

hey deckingman instead of only talking: how could i reduce the value? I have done the calibration posted here in duet forum and ended with this. So please tell me how to reduce

I don't like the calibration method that is on these forums. This is an old blog post but it details the method I use which works for me https://somei3deas.wordpress.com/2018/01/15/an-attempt-to-investigate-pressure-in-the-extrusion-system-with-a-diamond-hot-end/

PuddingBaer91

slicer settings for PLA:

print temp: 215°C
bed temp: 60°C
nozzle diameter: 0.4
extrusion multiplier: 0.88
retraction distance: 2.5 mm
retraction speed: 30mm/s
Layer heigth: 0.2 mm
start points: fixed position
cooling: 100% starting at second layer
relative extrusion: yes
speed: 60mm/s (outer perimeter and solid infill a bit slower
movement speed: 120mm/s
filament dia: 1.75mm
only retract when crossing open spaces
disabled retraction on layer change

PuddingBaer91

@deckingman said in Requested speed is not reached:

@puddingbaer91 said in Requested speed is not reached:

@deckingman said in Requested speed is not reached:

@puddingbaer91 said in Requested speed is not reached:

.........................my pressure advance value is: M572 D0 S1.624 .........................

S1.624! Seriously?

hey deckingman instead of only talking: how could i reduce the value? I have done the calibration posted here in duet forum and ended with this. So please tell me how to reduce

I don't like the calibration method that is on these forums. This is an old blog post but it details the method I use which works for me https://somei3deas.wordpress.com/2018/01/15/an-attempt-to-investigate-pressure-in-the-extrusion-system-with-a-diamond-hot-end/

thank you but even the autor from this article used a pressure advance value of 0.7 with much shorter bowden tube... Don't know what i could do to reduce it. maybe printing hotter?

deckingman

@puddingbaer91 I would suggest that if you need that sort of pressure compensation, then there is something seriously wrong that is causing too much pressure inside the hot end. That could be for any number of reasons, for example a partial blockage or too much part cooling air being deflected back off the build plate and dropping the temperature at the nozzle tip. I use a pressure advance value of 0.4 with my Diamond multi filament hot ends and that is considered high by many people. Most (but not all) users with "conventional" hot ends run values in the order of 0.1 to 0.2, even with long Bowden tubes. So there has to be something seriously wrong if you need values in excess of 1.6.

deckingman

@puddingbaer91 said in Requested speed is not reached:

@deckingman said in Requested speed is not reached:

@puddingbaer91 said in Requested speed is not reached:

@deckingman said in Requested speed is not reached:

@puddingbaer91 said in Requested speed is not reached:

.........................my pressure advance value is: M572 D0 S1.624 .........................

S1.624! Seriously?

hey deckingman instead of only talking: how could i reduce the value? I have done the calibration posted here in duet forum and ended with this. So please tell me how to reduce

I don't like the calibration method that is on these forums. This is an old blog post but it details the method I use which works for me https://somei3deas.wordpress.com/2018/01/15/an-attempt-to-investigate-pressure-in-the-extrusion-system-with-a-diamond-hot-end/

thank you but even the autor from this article used a pressure advance value of 0.7 with much shorter bowden tube... Don't know what i could do to reduce it. maybe printing hotter?

I am the author that post - that is my blog I linked too. As I said in my post above, and as described in my blog, those tests were done with a Diamond hot end which uses 3 Bowden tubes and 3 extruders and has a massively large melt chamber. Since changing my extruders from E3D Titans to Bondtech BMGs, I have reduced the PA to 0.4.

Veti

@puddingbaer91 said in Requested speed is not reached:

M305 P0 T100000 B4138 C0 R4700 X2 ; Set thermistor + ADC parameters for heater 0 and remap it to channel 2
M143 H0 S80 ; Set temperature limit for heater 0 to 80C
M305 P1 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 1
M143 H1 S250 ; Set temperature limit for heater 1 to 250C

the tronxy x5s on marlin uses thermistor table 1
which is
// R25 = 100 kOhm, beta25 = 4092 K, 4.7 kOhm pull-up, bed thermistor
4138 is the default in the configurator. so you might be printing at the wrong temperature

dragonn

Please also check you bowden tube mounting, if you fittings are lose and the tube moves when retraction/extruding back and forward they you will get problems like to high PA.

PuddingBaer91

@veti said in Requested speed is not reached:

@puddingbaer91 said in Requested speed is not reached:

M305 P0 T100000 B4138 C0 R4700 X2 ; Set thermistor + ADC parameters for heater 0 and remap it to channel 2
M143 H0 S80 ; Set temperature limit for heater 0 to 80C
M305 P1 T100000 B4138 C0 R4700 ; Set thermistor + ADC parameters for heater 1
M143 H1 S250 ; Set temperature limit for heater 1 to 250C

the tronxy x5s on marlin uses thermistor table 1
which is
// R25 = 100 kOhm, beta25 = 4092 K, 4.7 kOhm pull-up, bed thermistor
4138 is the default in the configurator. so you might be printing at the wrong temperature

interesting what do i have to change here?

is this right?

M305 P1 T100000 B4092 C0 R4700

Veti

the ender 3 uses epocs 100k as well
see
https://duet3d.dozuki.com/Guide/Ender+3+Pro+and+Duet+Maestro+Guide+Part+2:+Configuration/38
step 7 (the r2200 is maestro specific)

PuddingBaer91

@puddingbaer91 said in Requested speed is not reached:

M305 P1 T100000 B4092 C0 R4700

sorry i forget that i use this thermistor: https://www.ebay.de/c/22025877022

Phaedrux

@puddingbaer91 said in Requested speed is not reached:

@puddingbaer91 said in Requested speed is not reached:

M305 P1 T100000 B4092 C0 R4700

sorry i forget that i use this thermistor: https://www.ebay.de/c/22025877022

That's a heating cartridge.

Veti

@puddingbaer91 said in Requested speed is not reached:

sorry i forget that i use this thermistor: https://www.ebay.de/c/22025877022

that is some random other stuff. not a genuine e3d thermistors

according to a comment on amazon
https://www.amazon.de/NTC-Thermistor-Patrone-V6-Hotend-Prusa-i3-RepRap-3D-Drucker/dp/B077MLDBF1
the beta value for that is 4276

edit:
it might be a semitec 104-GT
https://atcsemitec.co.uk/wp-content/uploads/2019/01/Semitec-NT-4-Glass-NTC-Thermistor.pdf
in that case use
β: 4725 K
C : 7.060000e-8

PuddingBaer91

@veti said in Requested speed is not reached:

4276

hey thank you for your help. I asked the seller for data. Also ordered PT100 daugtherboard and PT100 sensor. Will inform you if i have new results

PuddingBaer91

because i can't wait for the new sensor i have done the calibration for pressure advance again at 245°C and i ended up somewhere at 0.8 - 0.9. It really seems to be a temperature problem.

Could you tell me if the temp read out drops or goes up by lowering the B value? Because you found out lower values i am interested in if this is the right direction for getting lower temps so i have to heat up more...

dc42

Increasing the beta value reduces the temperature reading, for temperatures above 25C. Therefore, if you think the hot end temperature is lower than the reading, increase the beta. If you think the hot end temperature is higher than the reading, reduce the beta.

PuddingBaer91

thank you for your help.

Today i installed the PT100 sensor and now it's much better. Now i need a pressure value of 0.7. But another problem is the higher Extruder jerk (600mm/min instead of 300). Because of this i hear the extruder and that sound is not cool as with jerk=300. But to get the full speed i need a higher value like you said. Using Bondtech extruder.

Do you ignore this sounds and is it normal? I read some articles where people use 3000mm/min but i can't imagine how terrible this will sound... Is there another thing i have to adjust to get rid of this sounds?