Posts made by mildw4ve

UPDATE
I did check for loose screws connected to rattling and I found one one the X carriage, fixed that and rattling is gone.

Vibration at specific speeds is still a problem though and it's definitely coming from the AB motors. AB motors are rated for 1.7A each. Previously I tried lowering AB motor current from 1000 to 800mA with no change in noise. This time I changed it from 1000 to 1500mA and to my surprise the vibration at those specific speeds has calmed down a bit. Motors are a bit louder overall, but at those specific speeds there is less vibration. Anything else I could try with this new piece of information?

Running a corexy Voron 2.4 on a DUET 2 WIFI. I have a problem where the machine gets really loud when moving XY axes during normal operation. Here is a video:
https://drive.google.com/file/d/1aKbINvV2XIEWPy-sZN3e83ji9LzI21u4/view?usp=sharing

• First 40mm/s right-left-right - noise
• Second 60mm/s right-left-right - no noise
• Third 80mm/s right-left-right - a lot of noise

I also run a diagonal test (no video):

• First 40mm/s front_left-rear_right-front_left - no noise
• Second 60mm/s front_left-rear_right-front_left - noise
• Third 80mm/s front_left-rear_right-front_left - no noise

What I tried so far:

• Different DUET 2 WIFI board. I was able to borrow one - no change
• Temporary switch from 12V to 24V PSU - no change
• Disconnecting everything but AB motors and endstops - no change
• Connecting a different, unmounted stepper to A and B driver. It vibrates a lot at the same specific speeds - so no change
• Different, separate stepper cable - no change
• Lowering AB current down to 800mAh - still lots of noise

I'm quite sure that the AB motors are the source of the vibration. I'm really at a loss on what to try next.

This is my config.g drive setup:

; Drives
M569 P0 S0                                                     	; Drive 0
M569 P1 S0                                                    	; Drive 1
M569 P3 S0                                                     	; Drive 3
M569 P5 S1                                                     	; Drive 5
M569 P6 S0                                                     	; Drive 6
M569 P7 S1                                                     	; Drive 7
M569 P8 S0                                                     	; Drive 8
M584 X0 Y1 Z5:6:7:8 E3  										; Drives assignments

M350 X16 Y16 Z16 E16 I1                                   		; Configure microstepping
M92 X80 Y80 Z400 E415 	                        		; Set steps per mm	

M203 X18000 Y18000 Z400 E6000 									; Set maximum speeds (mm/min)
M566 X600 Y600 Z20 E300 P0        								; Set maximum instantaneous speed changes (mm/min)
M201 X2400 Y2400 Z200 E2400     								; Set maximum accelerations (mm/s^2) 
M204 P2000 T800													; Set printing and travel accelerations
M906 X1000 Y1000 E600 Z1000                 	       			; Set motor currents (mA)

Is there a precision difference between DUET2 connected endstop and DUEX connected endstop?
I'm planning on running a dual endstop Y axis, first Y motor/endstop connected to DUET2, second Y motor/endstop to DUEX. Should I expect any issues with this setup?

@Phaedrux said in How to limit extruder feedrate without limiting retraction speed:

They won't become more advanced if the limitations are hidden from them. If the extruder speed is limited as you suggest, then printing speed will have to reduce to maintain it.

I'm perfectly fine with max extruder speed imposing a limit on XY axis speeds. Car manufacturers often electronically limit max car speed to a specific value above which tires could break apart. Another example could be a combustion engine rev limiter which also in theory limits performance but also prevents mishaps.
I want to do something similar by limiting max extruder speed to a value above which the extruder will not work properly anyway by either skipping steps or losing traction on the filament.

@Phaedrux said in How to limit extruder feedrate without limiting retraction speed:

Use a slicer with a volumetric limit function?

The feature is not worth enough to warrant a slicer change just for this feature (I would lose other important features to gain this one), which is why I'm looking for a way to limit this in DUET/RRF.

@Danal
Are You saying that if I use M203 E600 to limit extruder speed to 10mm/s, that limit will only work for printing moves and not for retraction moves? That is what I want to achieve but from the tests I run a few months back that wasn't the case with stock firmware at the time and retraction moves were limited to 10mm/s.

Limiting X and Y axis speeds is a solution, but its not perfect. As stated before, machines are sometimes used by less advanced users and there are many scenarios in which limiting XY speeds instead of limiting extruder speed will not prevent mishaps. I don't want to prevent users from experimenting with the profiles, with unlimited max extruder speed a simple layer height increase will break the profile as the extruder will not be able to keep up with the higher material flow. Increasing print speed during printing could break a print as well. In my eyes finding a way to limit max extrusion speed to a safe value without limiting retraction should should be a nice solution. I'm just unsure what is the best way of achieving this.

I'm trying to limit max extruder feedrate speed but I don't want to limit retraction speed. So ideally I would like to set max extruder speed at ~10mm/s, because above that the extruder starts skipping steps but if I do this, I cant do fast retractions at speeds of 40-60mm/s.

I know I could use firmware retraction, but that makes retraction settings in the slicer (S3D) useless. The machine is supposed to be used by less advanced users so explaining that slicer retraction settings dont work and they have to by modified in starting scripts isnt a good idea.

How can I approach this problem? I was thinking of modifying the code to recognize retraction moves (I'm using absolute extruder moves) and disabling feedrate limit for retraction moves but so far it's proving to be quite difficult. Is there a different way to do this?

I have a DUET2 Eth + DUEX5 setup, dual hotends and a heated platform, all 3 temperature sensors are connected to the DUET board.
I'm also trying to connect a chamber temperature sensor(no heater) to the DUEX5 e2_temp using a PT1000 sensor, here is my config for it.

M305 S"Chamber" R4700 T1000 P102 X3

It does show in the "Extra" tab in DWC and at room temperature the value is ~24 C Problem is that when I heat it up the temperature goes down, not up. The sensor itself seems fine, when I swapped it for a platform temp sensor(same one) it was working fine.

Hello,

I've got a DUET powered dual extruder (dual nozzle) machine, I'm trying to tune Simplify3D profile starting script for temperatures for it and could use some help.

• I want to set different standby and active temperatures for each nozzle
• I want to minimize the time it takes to start printing (so I'm setting temperature tolerance using M116 Sx)

This is my current starting script for an ABS/HIPS profile, standby temperatures are 220/200, active temps are 250/230C.

; Temperatures
M140 S[bed0_temperature]
M104 S[extruder0_temperature] T0
M104 S[extruder1_temperature] T1
G10 P0 R220 				; set T0 standby temperatures
G10 P1 R200 				; set T1 standby temperatures
M116 H0 S10 			        ; wait for bed temp
M116 P0 S5				; wait for T0 temp

• For some reason when current platform temperature is for example 80C and I use a PLA profile that sets platform temperature to 50C it will only start printing when the temperature comes down to 52C. So its ignoring my 10C tolerance and using (standard?) 2C tolerance
• Is there anything that could be done differently to optimize it more?
• Can I use M116 for both nozzles at once? Will M116 P0:1 S5 work?

What is the proper approach to configuring workarea with a chimera style dual extruder hotend?
Right now I'm using G10 P0 X0 Y0 for the left nozzle and G10 P1 X<value> Y<value> for the right nozzle to set offset between both nozzles. The problem is that when I home X and Y (both home at left front corner, thats where endstops are located), if I start printing with the left nozzle at the left edge of the platform, when I switch to the right extruder it cant reach the same spot.
What should I change?

As far as I know RRF and DUET WIFI/Ethernet currently does not support telnet in client mode, only server mode. I have a device which I want to control from DUET using telnet, in order for it to work DUET has to be the client.

I wanted to ask if there are any obstacles other than time required for adding telnet client support? Are there any hardware or software reasons for only server mode being supported at the moment?

What kind of crimper do You use, could You share a photo or a link? Some crimpers work better than others and some don't work at all.

@deckingman

It's a cartesian with the bed moving in Z axis and direct driven hotend moving in XY. 2 Y axis motors, 1 X axis motor.

Seam is set to optimized but I checked the GCODE viewer and its always in the same place, by that I mean its vertical with this particular model.

No infill, just 2 perimeters (it looks the same with infill), base speed is 100mm/s with outer wall speed at 40mm/s, lowering speeds does not help.

@dc42

The model in the photo has XY dimensions of 40x40mm, horizontal distance between ribs is around 8mm and with 11mm diameter filament gear, 0.2mm layer height, 0.4mm nozzle, I don't believe there is a correlation there. My math might be wrong though.

Thank You for the response.
I changed the extruder stepper motor to a 42BYGHW609 rated for 2.55V, 1.7A and 2.8mH. I tried 800, 1000 and 1600 mA but the wall quality has not changed.

Hello,

I'm having issues tuning my extruder stepper motor. For the extruder I'm using a JK42HW34-0334 stepper with these specs:
Resolution: 200 steps/Rev (with 1.8 °)
Rated voltage [v]: 12 V
Consumption current coil: 0,33 A
Coil resistance 34 Ohms
The inductance of the winding: 46 mH
The moment held 2.3 kg*cm (0,22 Nm)
Conclusions: bipolar (four wire)
Weight: 200 g

As visible in the photo, I'm getting some diagonal ribbing on the walls.

In config I'm using 16 microsteps interpolated to 256, 400mA current.
Increasing current to 800mA makes the ribbing more pronounced, going down to 300mA makes no difference compared to 400, extrusion issues begin below 300mA.
Changing microstepping to full 256 without interpolation only increases the frequency of the ribbing.

What else can I try?

I will add my 2 cents on the matter.

I have successfully connected this kind of an SD slot board to the DUET 2 "CONN_SD" port

The board has both 3.3V and 5V input, I went with 3.3V. Connecting it is really rather easy, get the DUET pinout diagram and make connections from DUET "CONN_SD" to the board, GND to GND, CS to CS, MISO to MISO and so on.

I used an ethernet solid core cable and in total its maybe around 1m long. So far I have two over 8h long prints behind me and so far with no issues.

Replaced both of the chips, it took some skillful work with a soldering iron but it worked.
Just a small followup in case anybody encounters the same issue with their DUEX

I do have a Duet 2 Ethernet v1.04

The encoder is a Kuebler 2430
https://www.kuebler.com/k2014/j/en/produkte/details/drehgeber/Inkremental/2430

Technical Data

Shaft Type Shaft
Dimension Ø 24 mm
Flange Ø 24.00 mm
Ø 28.00 mm
Ø 30.00 mm
Connection Cable radial
Cable axial
Protection max IP67
Working temperature -20° C ... +85° C
Speed max. 12.000 min-1
Supply voltage 5 VDC
Interfaces RS422
Resolution max: 256 ppr | Incremental

Can 5V optical encoders be used to measure filament flow? I tried connecting them to E0 endstop input with a 3.3V endstop power but the encoder doesn't work at such low voltage, it needs ~4V minimum.
Is it safe to connect the encoder to a 5V pin on either the DUET or DUEX?

Thank You for all the help, we do have hot air reworking stations at our disposal so we can definitely go down that route.
I found 2x 74HCT02 chips on the DUEX5 board, both are labeled "HT02 82KG4 AP91", the closest I could find is a chip labeled "HT02 75KG4 CS41" found here https://www.tme.eu/gb/details/sn74hct02pw/gates-inverters/texas-instruments/

Is that a proper replacement?

I'm using a tiny SG90 type 9g servo, all that together with a few weeks old DUET Ethernet 1.04 and a DUEX5.
Is it possible that some pins of the microcontroller on the DUET board got damaged? I'm thinking of disconnecting the DUEX and connecting a servo directly to DUET expansion connector pins to check if it's working correctly.