I could use some help

A Former User

@fcwilt nah, man, that's a bad idea. Guests are way more important. You do your thang, okay? get ready for your guests, and enjoy the whole experience.

Get back to me when you really have the time.

Between now and then, I'll redo the tests according to the post I'm replying to, where you presented the information / instructions in bold face.

I'm upload the results to you, and you can get back to me when you really have the time.

Mark Out.

fcwilt

@mac said in I could use some help:

@fcwilt nah, man, that's a bad idea. Guests are way more important. You do your thang, okay? get ready for your guests, and enjoy the whole experience.

It's always nice to greet the guests when they arrive.

But you know the best part?

Waving to them when the leave.

Frederick

A Former User

@fcwilt I redid the test. I shot a video of it. I'm uploading that to youtube as I write this.

The Status Display didn't provide any new information. Y remained at 0.0 the whole time.

I had to click SEND dozens of times to get the bed all the way back to the end-stop. When the bed refused to move any further, I looked at it, and tried to capture video of it. That's when I touched something with my phone, and turned the recording off.

But there's enough visual information in the video I'm uploading to show you the behavior of the bed.

I'm thinking there's a major band-width problem here. Whereas if I was sending a command where Y-50 or Y-110 was the setting, because it was one message sent to the board, the board would get that message, and act accordingly.

How to change / fix that, I don't know, but I'll see what I can do about it.

Enjoy the party!

Mark

A Former User

@fcwilt link text

This is the video I made of the test.

@droftarts

pjl

@mac from the video it sounds like stepping issues, like if it was low current with way too high rpm.

But looking at this thread (wtf how is this 500+ replies in a few days ) im inclined to believe that has been thoroughly looked over in the config.g?

And then I'd still look at the basics again before anything else. Is everything really wired properly.. I swear for me thats the issue 70% of the time

droftarts

@mac I watched the video. Y axis is moving a random distance each time. I would say either:

the motor can’t handle the current jerk or acceleration settings, or
the pulley on the motor shaft is loose.

I’d actually think the second of those is most likely. Have you ever taken the pulley off the motor shaft? When you replaced it, it should have a grub (or set) screw that screws onto the flat on the motor shaft. Check this is tight.

Ian

Edit: to test, get a Sharpie and put a dot on the end of the motor shaft and pulley. Then move the axis, and see if the dot on the motor shaft and pulley go out of alignment.

rexx

just had to reply here for the reply count cheers maybe try an rc car???... best of luck and big up's to those trying to help out here

A Former User

@rexx my last cr build was an SM800 Octocopter.

A Former User

@droftarts good suggestions. I checked both set screws they were plenty tight.

Ian, how would you represent the motor pictured above in my config.g?

Mac

fcwilt

@mac said in I could use some help:

This is the video I made of the test.

Thanks mac,

That was very informative. Something is seriously messed up.

Just to play it safe would you please post your current config.g file so we can check the stepper settings.

Frederick

fcwilt

@mac said in I could use some help:

This is the video I made of the test.

Is it possible the stepper and belt are moving fine but the bed is not staying firmly hooked to the belt?

I've never worked on one of these printers so I don't know how that connection is made.

Frederick

rexx

@mac nice ESC maddness or just one not formiliar with it specifically but i run a revolt 31"boat" well 2 but one is stock the other has leopard 36/74 1650kva on 6s 100C lipo's turning close to 26500 rpm's at 53 MPH 2 blade prop, that octocopter looks stable as a table

Falkia

Maybe an output of M122 after this strange jogging could give some information?

droftarts

@mac I'm wondering if the motors just aren't compatible. If that screen grab is correct, 4.5ohms per phase of resistance is high, as is 9.5mH per phase of inductance. There's another thread about high inductance motors struggling with the Trinamic drivers on the Mini 5+. It could be why you have such high coil whine (the constant squealing noise).

I think one thing that did help earlier in this thread, and you're not doing at the moment as far as I know, is to use StealthChop all the time. Add D3 V0 to all of the M569 motor commands in config.g.

As for other settings, post your current config.g and I'll take another look.

Ian

fcwilt

@mac

Hi mac.

To add a bit of info to what @droftarts posted mentioning the resistance and inductance of your steppers, here are those specs from three of my printers

             Yours      Mine #1  Mine #2   Mine #3
Resistance    4.5         1.4      1.5       1.6
Inductance    9.5         3.0      3.8       2.8

As you can see your numbers are a good deal higher, at least as far as steppers go.

I believe that droftarts may have found the problem - which would be grand.

Frederick

A Former User

@fcwilt both ends of the belt are hooked to the front and rear sides of the frame that supports the bed, creating a continuous loop. Each end of the belt is folded over a hook, and zip-tied in two ways: around the loop, and across the loop including the hook. If the belt isn't tight, the pulley wheel at the rear of the frame and yank on it, and eventually break it.

A Former User

@droftarts I'll try your suggestion, but Ian, if these motors are crap, I will immediately buy excellent motors to replace them if only you'll make a recommendation!

A Former User

@droftarts

Here's the newest config.g

; Configuration file for Duet 3 Mini 5+ (firmware version 3.3)
; executed by the firmware on start-up
;
; generated by RepRapFirmware Configuration Tool v3.3.10 on Mon Jun 27 2022 12:50:38 GMT-0700 (Pacific Daylight Time)

; General preferences
G90                                                ; send absolute coordinates...
M83                                                ; ...but relative extruder moves
M550 P"Frankenstein's Cinderella"                  ; set printer name

; Network
M552 S1                                            ; enable network
M586 P0 S1                                         ; enable HTTP
M586 P1 S0                                         ; disable FTP
M586 P2 S0                                         ; disable Telnet

; Drives
M569 P0.0 D3 V0 S1                                       ; physical drive 0.0 goes forwards
M569 P0.1 D3 V0 S0                                       ; physical drive 0.1 goes backwards
M569 P0.2 D3 V0 S1                                       ; physical drive 0.2 goes forwards
M569 P0.3 D3 V0 S1                                       ; physical drive 0.3 goes forwards
M584 X0.0 Y0.1 Z0.2 E0.3                           ; set drive mapping
M350 X16 Y16 Z16 E16 I1                            ; configure microstepping with interpolation
M92 X100.000 Y100.00 Z4000.00 E420.00                 ; set steps per mm
M566 X900.00 Y900.00 Z60.00 E120.00                ; set maximum instantaneous speed changes (mm/min)
M203 X6000.00 Y6000.00 Z600.00 E1200.00            ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z200.00 E250.00               ; set accelerations (mm/s^2)
M906 X600 Y600 Z600 E600                           ; set motor currents (mA)
M84 S0                                             ; Disable motor idle current reduction

; Axis Limits
M208 X0 Y0 Z0 S1                                   ; set axis minima
M208 X220 Y220 Z240 S0                             ; set axis maxima

; Endstops
M574 X1 S1 P"!io5.in"                              ; configure switch-type (e.g. microswitch) endstop for high end on X via pin !^io5.in
M574 Y1 S1 P"!io6.in"							   ; configure switch-type (e.g. microswitch) endstop for high end on Y via pin !^io6.in
M574 Z1 S1 P"!io2.in"							   ; configure switch-type (e.g. microswitch) endstop for high end on Z via pin !^io2.in							   

; Z-Probe
M950 S0 C"io3.out"                                 ; create servo pin 0 for BLTouch
M558 P9 C"io3.in" H5 F120 T3600                    ; set Z probe type to bltouch and the dive height + speeds
G31 P500 X15.875 Y0.625 Z2.5                       ; set Z probe trigger value, offset and trigger height
M557 X5:190 Y5:215 S10                             ; define mesh grid

; Heaters
M308 S0 P"temp0" Y"thermistor" T100000 B4092       ; configure sensor 0 as thermistor on pin temp0
M950 H0 C"out0" T0                                 ; create bed heater output on out0 and map it to sensor 0
M307 H0 B0 S1.00                                   ; disable bang-bang mode for the bed heater and set PWM limit
M140 H0                                            ; map heated bed to heater 0
M143 H0 S33                                        ; set temperature limit for heater 0 to 33C
M308 S1 P"temp1" Y"thermistor" T100000 B4092       ; configure sensor 1 as thermistor on pin temp1
M950 H1 C"out1" T1                                 ; create nozzle heater output on out1 and map it to sensor 1
M307 H1 B0 S1.00                                   ; disable bang-bang mode for heater  and set PWM limit
M143 H1 S100                                       ; set temperature limit for heater 1 to 100C

; Fans
M950 F0 C"out3" Q500                               ; create fan 0 on pin out3 and set its frequency
M106 P0 S0 H-1                                     ; set fan 0 value. Thermostatic control is turned off
M950 F1 C"out4" Q500                               ; create fan 1 on pin out4 and set its frequency
M106 P1 S1 H1 T45                                  ; set fan 1 value. Thermostatic control is turned on

; Tools
M563 P0 S"optional" D0 H1 F0                       ; define tool 0
G10 P0 X0 Y0 Z0                                    ; set tool 0 axis offsets
G10 P0 R0 S0                                       ; set initial tool 0 active and standby temperatures to 0C

; Custom settings are not defined

; Miscellaneous
M501                                               ; load saved parameters from non-volatile memory
M911 S21 R23 P"M913 X0 Y0 G91 M83 G1 Z3 E-5 F1000" ; set voltage thresholds and actions to run on power loss

fcwilt

@mac said in I could use some help:

@fcwilt both ends of the belt are hooked to the front and rear sides of the frame that supports the bed, creating a continuous loop. Each end of the belt is folded over a hook, and zip-tied in two ways: around the loop, and across the loop including the hook. If the belt isn't tight, the pulley wheel at the rear of the frame and yank on it, and eventually break it.

It sounds secure so @droftarts suggestion about changing the M569 settings is an excellent next step.

Are you going to have a chance to do that soon?

If you do get to make the changes, just do again what you did in the video and see if now each click on "move by 10" actually moves the bed by 10, visually that is, not by the DWC display, it will always show the correct value even if the bed did not move at all.

Let's hope the problem has been found.

Hope you are feeling better.

Frederick

A Former User

@rexx I had it in the air for up to twenty minutes at a time. And then the FAA shut us down.

I'm hoping to get a Mini 3 soon.