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Author Topic: Extruder cools once job is started  (Read 507 times)

AlexofCharmCity

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Extruder cools once job is started
« on: February 08, 2013, 08:27:27 AM »
I just finished putting this thing together and after doing the pre-flight check have tried 3 different files in repetier. Every time I hit the run job after splicing it hits the heating extruder command and does not do anything. Actually it cools it, really fast. I can even setup the extruder temperature manually before hand but as soon as I hit tun file its like it shuts off the power to it. Also I notice the red light is not on on the board when the program tries to do it itself but it comes on when I set it manually and will ooze forever.

As soon as I kill the job I can manually set the temperature again and it shoots right up. I'm completely toast on figuring this one out.

I also keep seeing " *2 " in the logged code when it just locks up and sits there. Please any help would be nice.

trying to print pla on a van 8 using win 7 temp set at 190 running repetier host v0.83 with a azteeg x3 wit a single extruder.

whosawhatsis

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Re: Extruder cools once job is started
« Reply #1 on: February 08, 2013, 09:42:52 PM »
Can you post the first 20 or so lines of one of the gcode files?

AlexofCharmCity

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Re: Extruder cools once job is started
« Reply #2 on: February 10, 2013, 03:41:50 PM »
Sure no problem

here is one

; generated by Slic3r 0.9.8 on 2013-02-08 at 02:56:19

; layer_height = .05
; perimeters = 3
; top_solid_layers = 3
; bottom_solid_layers = 3
; fill_density = 0.4
; perimeter_speed = 30
; infill_speed = 60
; travel_speed = 130
; scale = 1
; nozzle_diameter = 0.35
; filament_diameter = 2.87
; extrusion_multiplier = 1
; perimeters extrusion width = 0.56mm
; infill extrusion width = 0.56mm
; first layer extrusion width = 0.60mm

M107
M190 S0 ; wait for bed temperature to be reached
M104 S190 ; set temperature
G28 ; home all axes
M109 S190 ; wait for temperature to be reached
G90 ; use absolute coordinates
G21 ; set units to millimeters
G92 E0
M82 ; use absolute distances for extrusion
G1 F1800.000 E-1.00000
G92 E0

and here is the code from the terminal cover designed for bukobot

; generated by Slic3r 0.9.8 on 2013-02-08 at 02:02:49

; layer_height = .05
; perimeters = 3
; top_solid_layers = 3
; bottom_solid_layers = 3
; fill_density = 0.4
; perimeter_speed = 30
; infill_speed = 60
; travel_speed = 130
; scale = 1
; nozzle_diameter = 0.35
; filament_diameter = 2.87
; extrusion_multiplier = 1
; perimeters extrusion width = 0.56mm
; infill extrusion width = 0.56mm
; first layer extrusion width = 0.60mm

M107
M190 S5 ; wait for bed temperature to be reached
M104 S205 ; set temperature
G28 ; home all axes
M109 S205 ; wait for temperature to be reached
G90 ; use absolute coordinates
G21 ; set units to millimeters
G92 E0
M82 ; use absolute distances for extrusion
G1 F1800.000 E-1.00000
G92 E0

whosawhatsis

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Re: Extruder cools once job is started
« Reply #3 on: February 10, 2013, 10:38:39 PM »
Try removing the M190 code. What the gcode is saying to do there is set the temperature of the platform to freezing (or in the case of the second one, near freezing) and wait to continue until it reaches that temperature (which it can't do, because it only has a heater).

It's weird that Slic3r is generating those codes. What version of slic3r are you using? The current version is 0.9.8, and it is included with the most recent version of Repetier Host, at least on the Mac. If you zip up your slic3r profiles and send them to me at rich@deezmaker.com, I'll see if I can figure out why it's generating those bad codes.

AlexofCharmCity

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Re: Extruder cools once job is started
« Reply #4 on: February 12, 2013, 06:00:37 PM »
I checked it out and your right, it was in the filament setting to set the bed at 5c.
Once I removed that it started moving normally.
But now I realize my bed is not heating up. The heated bed light is not even lit on the azteeg board when I manually set the temperature.
As well as nothing wants to stick to the tape but atleast my original problem is solved.
Thanks.

whosawhatsis

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Re: Extruder cools once job is started
« Reply #5 on: February 13, 2013, 09:18:10 PM »
See my reply to your email.

Also, you should be able to print PLA on blue painters tape without heating the platform.

AlexofCharmCity

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Re: Extruder cools once job is started
« Reply #6 on: February 14, 2013, 02:46:44 PM »
Sure can, I've been printing all the upgrade parts in PLA already.
Thanks again.

Rigel

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Re: Extruder cools once job is started
« Reply #7 on: May 25, 2013, 07:45:01 AM »
I'm running into the same issue.  Basically when I run the job, the platform heats first, then the extruder.  Once the extruder has reached temperature, the print starts and right away the extruder stops heating and drops in temperature.

I've attached a temperature curve which shows a normal run at number 1 and a bad one at 2.

Setting the temperature manually works just fine and if I interpret the graph properly it looks that the extruder heater is just being shut off.
I'm not sure why some prints work and others don't.

Here is the G-code on the failed print:
(M190, M104 and M109 seem to be set properly)

; generated by Slic3r 0.9.9-dev on 2013-05-24 at 21:13:18

; layer_height = 0.1
; perimeters = 2
; top_solid_layers = 3
; bottom_solid_layers = 2
; fill_density = 0.20
; perimeter_speed = 30
; infill_speed = 40
; travel_speed = 150
; nozzle_diameter = 0.35
; filament_diameter = 3
; extrusion_multiplier = 1
; perimeters extrusion width = 0.59mm
; infill extrusion width = 0.98mm
; solid infill extrusion width = 0.59mm
; top infill extrusion width = 0.59mm
; first layer extrusion width = 0.42mm

G21 ; set units to millimeters
M107
M190 S60 ; wait for bed temperature to be reached
M104 S187 ; set temperature
G28 ; home all axes
M109 S187 ; wait for temperature to be reached
G90 ; use absolute coordinates
G92 E0
M82 ; use absolute distances for extrusion
G1 F1260.000 E-1.20000
G92 E0
G1 Z0.300 F9000.000
G1 X15.310 Y11.230
G1 F1260.000 E1.20000
G1 X15.540 Y10.930 F900.000 E1.20650

Any help would be appreciated.
« Last Edit: May 25, 2013, 07:47:21 AM by Rigel »

Rigel

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Re: Extruder cools once job is started
« Reply #8 on: May 25, 2013, 07:48:50 AM »
Ooops...here's the attachment.

whosawhatsis

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Re: Extruder cools once job is started
« Reply #9 on: May 25, 2013, 08:22:58 PM »
The graph at the bottom indicates that the heater is at full power, but the fact that the temperature is dropping suggests that either the wiring going to your heater is coming loose or the 12V supply is failing (which would mean your motors stop working too). If the print is starting and causing the temperature to drop even though it is being driven at full power, my guess would be that the heater wires are loose in the terminal block on your X carriage, and the movement of the carriage is flexing the wires and breaking the connection.

Rigel

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Re: Extruder cools once job is started
« Reply #10 on: May 25, 2013, 11:47:14 PM »
Thanks Rich!  You were dead on.  It was a loose wire on the x carriage terminal block.

 

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