Please That would be great!!!

You mean G30 S-1?

I use these to run fans, LEDs, etc. in my 24V powered printer. They seem to be reliable and they run cool. They're tiny and cheap!

@dougal1957 said in Rigid vs Flexible Couplers for Trapezoidal Leadscrews?: I Received my Oldham couplings from Misumi and jeez they are nice and they are also very compact (About half the size of the std couplings that we normally use) I also realise that using them directly could transfer quite a lot of side thrust into the stepper motor bearing's so I intend to fit some Thrust bearings between the coupling and the stepper body to account for the side thrust. Doug Thanks for the update, @Dougal1957. But I'm a bit confused by how you describe your planned setup: if the thrust bearings goes between the coupling and the stepper motor, does that mean it will actually be going around the motor's shaft? If you could perhpas post some pics once you've got it installed, it'd be awesome as I'd love to see it and learn how you went about it

@genghisnico13 said in Force M703 execution: @wilriker Thanks, last night I configure it that way, but i'm not so sure about this: "If you have T0 also in your config.g this should then execute tpost0.g", as far as I understand it all the t macros are only executed if a different tool is selected, and since I only have one, T0 doesn't execute any macro. I tried putting T0 in config and no, tpost0 is not executed. Actually, I never bothered to check because my tpost0.g is more or less empty (I also have just this one tool) It would be nice to execute it before each print because I usually tweak it between prints until I find the perfect settings. In this case it would make most sense to have it in the start codes, I think. This does what you need plus it does not require any changes in the firmware.

@phaedrux said in M906 reports E:0 on update to 1.19.2: @madhunm Try retyping the line from scratch in the config. Done; no use. After rebooting, M906 in the console results in: M906 Motor current (mA) - X:2000, Y:1500, Z:1500, U:1500, E:0, idle factor 30%

You can check by computer setting and search on internet, if still not got solution , you can take help from Microsoft Office Support Number

@dc42 This link works

@dc42 said in BLTouch on fan or heater pins on Duet Wifi: Are you really using all 8 heater outputs? No, I am not using all 8 heater outputs. But for the sake of a cleaner setup (all 5 extruders on duex), I opted to go this path. The gcode I found here does not work as you cannot use M106 to control a servo (anymore) Just to have it documented for others: I am using Fan2 on Duet Wifi to control BLTouch. Follow the excellent instructions on https://betrue3d.dk/bltouch-on-duet-wifi-configuratio-and-usage There are 2 differences in my setup: In config.g replace M307 H7 A-1 C-1 D-1 ;Disable the 7th Heater to free up PWM channel 5 on the Duex board. with M106 P2 I-1 ; Disable fan 2 for BLTouch PWM In deployprobe.g use M280 P22 I1 S10 ; use this when connected to fan 2 retractprobe.g use M280 P22 I1 S90 ; use this when connected to fan 2 If you choose another fan, for example fan 0, change config.g such as M106 P0 I-1 ; Disable fan 0 for BLTouch PWM and in deploy and retract scripts M280 P20 I1 S10 ; where Pn corresponds to PIN number, not fan number as outlined here

@Moriquendi The carriage is basicly always the same. Before I got a direct mount with BMG and pancake stepper motor. The last values were reliable and good. Even with fan running. Since one week the fan is always of to eleminate the bad affects Then I changed the design to bowden. I removed the mount parts for direct drive and decreased the height. I did not change the rest. I never used the groovemount you shipped. I always use my integrated, where I got bad and the very good values, too. Here is the picture of the "old" mount.

Fantastic discussion gentleman. I enjoyed reading this post and the thoughtful responses. I spent 1 year of my college time spent on electronics and computer repair. The information I learned was only the sugar in the cake. Without the remaining ingredients it only left me with basic electronics skills which in many cases is much more than the average person and I was able to take those skills along with automotive computer programming and apply it in years of custom building fuel injected hot rods and diagnosing them. Those years along with self taught fabrication led me to own a machine shop today. It’s hands on and yet I feel so lost in many ways with all these different motor applications. I can look at 4 photos of motors that look identical and everyone of them operates completely differently. How frustrating is that? .,And to further expand with hundreds of hours online studying I feel I barely grasp essential concepts. I too would love to delve into the use of bldc motors and I think that they do have some applications where they would be useful including direct drive spindle motors for various CNC operations. It’s been done, it’s being accomplished and even in 3D printing there are many using it for their x/y axis and yet very few discussions that make me comfortable in delving into experimentation. Almost as though it’s a secret recipe. Perhaps as much it is. I would like to utilize a bldc motor for a quick change mini mill, engraving spindle for a 3D printer project here but I fear I would delay completion of the project delving into learning what circuits, programming, and processes are required to successfully implement it besides I lack all the time necessary to experiment so not having a tried and true plug and play option is very discouraging. I agree that if you have the motors, they are free, and you have the time than why not experiment and see what you accomplish? And if so.., please share with the rest of us.

The Duet Ethernet and Duex 5

@dc42 I'm not using stall detection I just have a linear rail system and every once in a while my motors will stall due to the linear rail system binding (because of dust I think) and after several time of my motors stalling I feel that it gets more and more frequent. I once swapped out the linear rail system for an openrail system and the duet still continued to stall my dual y axis motors...Then I swapped out the duet and I had no problems after that. However, now with my new openrail system my system will work for about 200 hours and then start stalling the y axis motors. Once that happens I pop in a new duetwifi and everything starts working again. WHY IS THAT? It doesn't make a lot of sense unless the motor drivers have a lifespan of 200 hours. This is my config file for reference: ; Configuration file for Duet WiFi (firmware version 1.20 or newer) ; executed by the firmware on start-up ; ; generated by RepRapFirmware Configuration Tool on Fri Jun 08 2018 17:51:24 GMT-0700 (Pacific Daylight Time) ; General preferences G90 ; Send absolute coordinates... M83 ; ...but relative extruder moves M555 P2 ; Marlin Compatibility ; Network M550 PCFB_03 ; Set machine name M552 S1 ; Enable network M586 P0 S1 ; Enable HTTP M586 P1 S0 ; Disable FTP M586 P2 S0 ; Disable Telnet ; Motor Remapping M584 X0 Y1:2 V3 U4 Z6; ; Drives M569 P0 S1 ; Drive 0 goes forwards (towards endstop) M569 P1 S0 ; Drive 1 goes backwards (towards endstop) M569 P2 S1 ; Drive 2 goes backwards (towards endstop, matches Drive 1, mapped above) M350 X8 Y8 Z16 I0 ; Configure microstepping without interpolation M92 X40 Y40 Z4000 ; Set steps per mm M566 X300 Y300 Z12 ; Set maximum instantaneous speed changes (mm/min) M203 X100000 Y100000 Z180 ; Set maximum speeds (mm/min) M201 X2400 Y2400 Z250 ; Set accelerations (mm/s^2) M906 X1600 Y2000 Z0 U0 ; Set motor currents (mA) M84 S0 ; Disable motor idle current reduction ; Axis Limits M208 X0 Y0 Z0 U0 S1 ; Set axis minima M208 X560 Y476 Z1 U1 S0 ; Set axis maxima ; Endstops ; Helper Comments: X1 endstop at low end, Y2 endstop at high end ; Helper Comments: S0=active low endstop input,S1=active high endstop input M574 X1 Y1 Z1 S1 ; See above for clarification. M574 U0 V0 S0 ; Heaters M140 H-1 ; Disable heated bed M307 H0 A-1 C-1 D-1 ; this is what dc42 says to do ; Fans M106 P0 S0.0 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off M106 P1 S0.0 I0 F500 H-1 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off M106 P2 S0.0 I0 F500 H-1 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned off ; Tools ; Extras M305 P101 S"DriverTemp"

@justine-haupt I have been having this problem for a while as well. My theory is that the motors create a vibration that is transferred to the frames and to the z axis, this takes place at a micron level and the vibrations cannot be noticed by the eye. Most Industrial machines reduce vibrations by increasing the weight of the frames by adding concrete in them or using a strong concrete foundation. Even the older stratasys machines were built like tanks and they used nema stepper motors as well. Vibration meters can be used to measure the vibration of the frames while printing and then stiffeners or weights can be used to increase the rigidity of the machine. This should hopefully reduce the effect of vertical banding. Not sure if this is even the correct method. Thanks, Hussain.

Glad that solved it for you! Only advice I can give you for best results is to target 70-85% of max rated current for your motor current, and then to experiment with jerk and acceleration values. Then try to dial in a good pressure advance value. Happy tuning.

Hi David, I just tried analogWrite on the Arduino code with the pin connected to the IN probe pin. When sending a static value of 100 on analogWrite the web interface is showing a bouncing value which is all over the shop. D3 is the pin on the Pro Mini I'm using which defaults to 480Hz PWM. Does this IN pin expect a true analog input of varying voltage levels or should raw PWM work in mode 1? Currently I use M558 P1 0 R0.8 H0.75 A10 S0.02 T2000 F60 X0 Y0 Z1 for the probe. Couldn't find any write up online for this. Also, the Duet Wifi I'm testing on is a V1.01 so I guess it's not tolerant to the 5V PWM? I can test on the newer board I have but I do need to get this one working. Might just put a 220ohm in series with D3 to see if that helps?

@joergs5 There are some industrial servo controllers that will take input from two encoders one for the motor and one for the motion axis for detecting backash like you mentioned. Its a really hand feature for geared servo motors, smaller high speed motor with gearbox to bring the speed down to something useable at a usefull torque. Multi-turn for absolute positioning would be a nice feature have for sure but they require battery powering of the encoder when the machine is turned off to retain position information in the encoder. For me personally I have no problem with the lower cost incremental encoder options from AMT and having to home a machine after power cycling but I can see why others would like to not have to home their machine and the other benefits that absolute position offers.