Posts made by loft

Thanks guys! I so far have tried the calculation and it seems to have worked. Im still getting a little blobbing but Im tweaking the extra restart a little to see if that helps. The jamming has stopped as well.

First thank you in advanced for any advice , I have spent months due to my lack of knowledge in 3d printer building trying to get my dbot printer to work.

It seems that I'm having to use a large number to get my prints to stop having blobs and zits in my print.

Right now my retraction length is 13mm which is extremely high and acctually causes jams due to the filament retracting so far back.

I assum this is from another cause but I'm not sure what? Is it stepper settings for extrusion ? If so can I make small adjustments to fix it without throwing everything out of wack?

@dc42 in the gcode isnt that what m190 does ?

I finally figure it out, after it homed twice for some reason it killed the job.

I changed the config provided below for homeall and now its printing.

Now just have to tune the extrusion

G91 ; relative mode
G1 S1 X-240 Y260 F3000 ; course home X or Y
G1 S1 X-240 ; course home X
G1 S1 Y260 ; course home Y
G1 X4 Y-4 F600 ; move away from the endstops
G1 S1 X-10 ; fine home X
G1 S1 Y10 ; fine home Y
G91
G1 Z5 F6000
G1 Z-305 S1 F1800
G90
; Tell the firmware where we are
G92 Z0

Well did more testing seems its not based on the homing it based on the heated bed coming to temp or right when it switchs from telling it to finish heating the bead and start heating the nozzle

The process is upload, heated bed get to 65C , it homes and then says its finished

@deckman , Thank you!

Here is also part of the GCODE from one of the test cubes

M107
M190 S65 ; set bed temperature
M104 S215 ; set temperature
G28 ; home all axes
G1 Z5 F5000 ; lift nozzle

M109 S215 ; wait for temperature to be reached
G21 ; set units to millimeters
G90 ; use absolute coordinates
M82 ; use absolute distances for extrusion
G92 E0
G1 Z0.300 F7800.000
G1 E-2.00000 F2400.00000
G92 E0
G1 X120.004 Y115.787 F7800.000
G1 E2.00000 F2400.00000

@deckingman yeah seems to happen right after it homes. Im using a config generated by the configuration tool
; Relative positioning
G91

; Lift Z
G1 Z5 F6000

; Course home X or Y
G1 S1 X-305 Y305 F1800
; Course home X
G1 S1 X-305
; Course home Y
G1 S1 Y305

: Move away from the endstops
G1 X5 Y-5 F6000

; Fine home X
G1 S1 X-305 F360
; Fine home Y
G1 S1 Y305

; Move Z down until the switch triggers
G1 S1 Z-305 F1800

; Absolute positioning
G90

; Tell the firmware where we are
G92 Z2.5

; Uncomment the following line to lift the nozzle after probing
;G1 Z5 F100

Tried Slic3r as well same result, seems to have something to do with when it homes it have the first initial heating

Thank you in advanced for any help!

I setup my DBOT and it all ready to test print.

Im using simplfied 3d, I used the settings based on the build guide. When I go to upload and print the printer start the heating process. About 1min into the process the print shows 100% complete, the heaters get up to temp , the system homes and then nothing.,

Any Ideas?

Thank you all for the welcome, suggestions and help! This gets me going in a direction for testing and getting the right config much appreciated!

Just added info:

@deckingman I followed the build materials of the original and bought the same motors he listed

I am running 24v and the motors 1.5amp

NEMA 17 BIPOLAR STEPPER MOTOR, KL17H248-15-4A, 76 oz-in

Specifications:
Shaft: 5mm diameter with flat
Current Per Phase: 1.5A
Holding Torque: 5.5Kg.cm (76 oz-in)
Rated Voltage: 4.2V
NO.of Phase: 2
Step Angle: 1.8° ± 5%
Resistance Per Phase: 2.8Ω± 10%
Inductance Per Phase: 4.8mH± 20%
Insulation Class: Class B
Dielectric Strength: 100Mohm
Operation Temp Range: -20 ~ +40° C
Lead Wire: 22AWG / 750mm with connector to stepper motor driver

First off thank you for any assistance I'm sure the question has been asked a million times, Im more then happy to read another thread or docs as well. Im having a tough time figuring out how to setup the micro-stepping/speeds ect for movement.

At the moment I just found the RepRap Calculator and punched in the numbers and put them in the problem is Im not even sure if the baseline it gave me is a good base line. Any help would be appreciated.

It's a DBOT which I extended to 300x300. Angle 1.8, Pitch 2mm,GT2 Belts, 16Tooth, 8mm Lead Screw, 2mm pitch

; General preferences
M111 S0 ; Debugging off
G21 ; Work in millimetres
G90 ; Send absolute coordinates…
M83 ; ...but relative extruder moves
M555 P2 ; Set firmware compatibility to look like Marlin

M667 S1 ; Select CoreXY mode
M208 X0 Y0 Z0 S1 ; Set axis minima
M208 X300 Y300 Z300 S0 ; Set axis maxima

; Endstops
M574 X1 Y2 Z1 S0 ; Define active low and unused microswitches
M558 P0 X0 Y0 Z0 H5 F120 T6000 ; Set Z probe type to switch, the axes for which it is used and the probe + travel speeds
G31 P600 X0 Y0 Z2.5 ; Set Z probe trigger value, offset and trigger height
M557 X15:285 Y15:285 S20 ; Define mesh grid

; Drives
M569 P0 S0 ; Drive 0 goes forwards
M569 P1 S1 ; Drive 1 goes forwards
M569 P2 S0 ; Drive 2 goes forwards
M569 P3 S1 ; Drive 3 goes forwards
M350 X16 Y16 Z16 E16 I1 ; Configure microstepping with interpolation
M92 X100 Y100 Z1600 E500 ; Set steps per mm
M566 X900 Y900 Z12 E120 ; Set maximum instantaneous speed changes (mm/min)
M203 X6000 Y6000 Z180 E1200 ; Set maximum speeds (mm/min)
M201 X500 Y20 Z250 E250 ; Set accelerations (mm/s^2)
M906 X800 Y800 Z800 E800 I30 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

; Heaters
M143 S290 ; Set maximum heater temperature to 290C
M305 P0 R4700 T100000 B3950
M305 P1 R4700 T100000 B4388
M307 H1 A446.6 C206.1 D4.9 S1.00 B0

; Tools
M563 P0 D0 H1 ; 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

; Network
M550 Ploftduet ; Set machine name
M552 P0.0.0.0 S1 ; Enable network and acquire dynamic address via DHCP

; Fans
M106 P0 S0 I0 F500 H-1 ; Set fan 0 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P1 S0 I0 F500 H-1 ; Set fan 1 value, PWM signal inversion and frequency. Thermostatic control is turned off
M106 P2 S0 I0 F500 H-1 ; Set fan 2 value, PWM signal inversion and frequency. Thermostatic control is turned off

; Custom settings are not configured