Extruder Printing Issues

Hi All, I have put together the RepRapPro I use windows 7 and am running Proterface, and all seems to be working OK except two things:-

1) I am trying to print the snowman.g and the X,Y,Z motions seem to be working OK but the extruder goes fwd as XYZ works, then the extruder backs up as much as it went forward, and the XYZ does its bit, so therefore I end up with NO print but it seems as though the XYZ movements have been all correct, any ideas?

2). I tryed using the network interface using google chrome (192.168.0.31) and I have only got it to work once, it asks for a password and in Pronterface you see it say the password is correct but no more shows on the Google Chrome, any ideas?

I have checked the voltages and they ar 3.3v 4.88v and 12.8v while the ATX P/S is on and 3.3v and 4.5v with the ATX off.

UPDATE :-
I ran XP and it did almost all the same things, The Google Chrome bit worked as good as the web interface is written, But what I found is the command E sent to the printer via Pronterface,
if I send G1 X50.585 Y50 E1.01 the extruder went forward and if I sent G1 X50.585 Y50 E0.11 for example, the extruder went in reverse. Why?
Not clued on the G code, but is G1 relative? which may mean the E0.xxx will go backward (extrude feed out not in) because it was already given a bigger number to extrude?

2nd Update:-
I found this in WIKI so I reckon that the Printer is doing the right thing

WIKI WROTE :- To reverse the extruder by a given amount (for example to reduce its internal pressure while it does an in-air movement so that it doesn't dribble) simply use G1 to send an E value that is less than the currently extruded length.
So how does the program print?

M116; Wait for all temperatures
G1 F1800.000 E-1.00000
G1 X83.486 Y74.398
G1 Z0.240 F3600.000 - my comments below of extruder movements
G1 F1800.000 E1.00000 -will go foward by 1mm
G1 X83.956 Y73.928 F600.000 E0.03212 - will go backward by 1 - 0.03212 = 0.96788mm
G1 X84.476 Y73.508 E0.03230 - will go forward by 0.03230 - 0.03212 0. = 0.00018mm
G1 X87.006 Y71.658 E0.15145 - will go forward by 0.11915mm
G1 X87.596 Y71.278 E0.03391 - will go backward by 0.11754mm
G1 X88.216 Y70.958 E0.03372 - will go backward by 0.00019mm
ETC

cheers

Edited 8 time(s). Last edit at 03/02/2014 07:11PM by Gyro.

What RepRapPro model have you put together? The Ormerod? Also, it looks like that gcode is in relative E. So, you need to have an M83 at the start of your gcode to make sure the firmware knows to expect relative E gcode. [reprap.org]

As for number 2, I'm guessing that you are using the Duet electronics? If so, and if you are building an Ormerod, you will get a lot more help in the proper subforum. I can move this topic there, just let me know.

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Hi Cameron,
Tis Gary here, I am answering the questions below, it's the RepRapPro Ormerod printer, the gcode has got M83 in the code, it's the code that come with the download "RepRapFirware-Master.zip and in that was a object called smowman.g in the SD image subdirectory so I've been trying to analyse it as I am not familiar with the Gcode, except for what I have read on Wiki, I have got the Duet Electronics, and as far as I can tell it does everything I ask it except print, as you can see I am new to this so I'd appreciate it if you did move the query to the right area, I thought the RepRapers was right, if I modified the code shown below so only the extrusions was absolute, it only moved the filament forward (and not backward at all) and at lease extruded but of course not correct, but if I run the code as supplied, it seems as tho the X,Y, and Z are doing everything correct but the extrusion wheel just goes forward and backward, but really ends up in the same position it started at the start of printing after the snowman.g code has finished, I and using the program Pronterface, cheers Gary

Snowman.g code I modified for testing show below ; generated by Slic3r 0.9.10b on 2013-12-05 at 21:07:27

; layer_height = 0.24
; perimeters = 2
; top_solid_layers = 4
; bottom_solid_layers = 3
; fill_density = 0.4
; perimeter_speed = 20
; infill_speed = 20
; travel_speed = 60
; nozzle_diameter = 0.5
; filament_diameter = 1.75
; extrusion_multiplier = 1
; perimeters extrusion width = 0.85mm
; infill extrusion width = 0.87mm
; solid infill extrusion width = 0.85mm
; top infill extrusion width = 0.85mm
; first layer extrusion width = 0.48mm

G21 ; set units to millimeters
G90 ; use absolute coordinates
M83 ; use relative distances for extrusion
M140 S65; Set bed temperature
G28 ; Home all axes
G1 Z5 F200 ; lift nozzle
G1 X2 Y50 F2000; Go to wait for warm position
G10 P0 S205 R0 ; Set extruder temperature T0; Select extruder M116; Wait for all temperatures
G91
G1 F1800.000 E-1.00000
G90
G1 X83.486 Y74.398
G1 Z0.240 F3600.000
G1 F1800.000
G91
G1 E1.00000
G90 <-----------------------------------I added this so the extrusion only went forward
G1 X83.956 Y73.928 F600.000
G91 G90 <-------------------------------I added this so the extrusion only went forward
G1 E0.03212
G90
G1 X84.476 Y73.508
G91
G1 E0.03230
G90

Hope you understand what I am trying to say

Gary, did you update the Duet firmware as described in the commissioning instructions? What version of firmware is reported when you sen the M115 command?

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

Hi Cameron,
No I didn't update it cuase I thought it was the latest.

serial: M115
FIRMWARE_NAME:RepRapFirmware FIRMWARE_VERSION:0.53 ELECTRONICSuet DATE:2014-01-06
ok

053 is old firmware. Latest official version is 057a from RRP, or you could use my 057q-dc42 version (see the "New firmware" thread).

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Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].

Hi Cameron,
I loaded the firmware 57a and it seems to do almost the right things, Didn't know where to find 057q, I just have to adjust the height from the bed etc, so wish me luck, a least the extuding works now,
Cheers
Gary