Firmware help please

Hi,

I hope all on the forum are well.

I wonder if if would be possible for some help with firmware/software to address the follwoing problem.

The problem i am experiencing is no extruder activity when gcodes (created in SF) are sent through the reprap host. I have very little extrudate when running gcodes and have tried to follow guidance from other threads. I'm not sure if this is somtheing to do with Skeinforge or the Firmware so I have posted in both areas of the forum - Apologies if this is not the right thing to do.

setup

OS - Windows 7 64 bit
Reprap Host also 64 bit
Electronics - Gen3 (1.2 Motherboard, 2.2 Extruder Board

Extruder is an Adrians Geared Extruder with a Nema 17 Stepper motor with 200 steps rotation. This is running directly from the extruder board with no stepper driver between the extruder board and the stepper motor.

Skeinforge 41 has been used to create the g codes
The Dimension setting has been enabled
Acceleration has been turned off in the firmware
E_Steps_Per_MM has been increased to 42.9 calculated using (200*(59/11))/(7.96*Pi)

Flow/Feed rate has been set at 30mm/s

Replace.csv file have been updated as outlined below (no quotation marks are in the csv file, it just pasted in that way).
"M108 ;M108"
"M101 ;M101"
"M103 ;M103"
"M105 ;M105"

I have also included the start of the gcode for more details.

M104 S205 T0
G21
G90
G92 X0 Y0 Z20
;M108 S255
M6 T0
G0 Z0
G28
G90
G21
M113 S1.0
;M108 S30.0
;M108 S12.0
G1 X0.69 Y10.36 Z0.28 F4500.0
G1 F3000.0
G1 E2.0
G1 F4500.0
G92 E0
;M101
G1 X52.36 Y10.36 Z0.28 F720.0 E2.4168
G1 X52.36 Y0.36 E2.8845
G1 X59.64 Y0.36 E3.225

Any feedback would be appreciated.

Thanks to all forum users.

Raj

Do you mean little or no extruder activity? I think your steps per mm should be around 70 for Adrian's extruder. But in my TZ gen 3 remix using pololu's for the extruder at 1/2 steps, I had to double the steps per mm to around 140. I don't know why.

Edited 1 time(s). Last edit at 06/11/2011 08:20AM by brnrd.

SkeinForge >= 40 wants STEPS_PER_MM for extrudate length, not for filament length. You likely have to increase that value by about 35 (for a 0.5 mm nozzle.

Also make sure your firmware is configured for absolute E values, or tell SF to produce relative lengths. The later is more correct, but the former more often used.

---

Generation 7 Electronics	Teacup Firmware	RepRap DIY

Quote
RepRapRaj83
E_Steps_Per_MM has been increased to 42.9 calculated using (200*(59/11))/(7.96*Pi)

Quote
Traumflug
SkeinForge >= 40 wants STEPS_PER_MM for extrudate length, not for filament length. You likely have to increase that value by about 35 (for a 0.5 mm nozzle.

Gen 3 uses 1/2 step motors which should be 400, not 200 steps/revolution. So, the calculated E_Steps_Per_mm should be 85.8.

Edited 1 time(s). Last edit at 06/11/2011 11:28PM by brnrd.

Thanks for that information. I have updated the firmware e_steps to 85.8 and will run some more tests.

Another post on which i posted the same message (http://forums.reprap.org/read.php?154,86701) has suggested the firmware needs to be updated to over roughly 10 times my initial calculation.

Could any readers please post how much they have had to increase their e_steps_per_mm in the firmware for comparison as there is quite a difference between 85.8 and 430

Thanks to everyone for their input.

Raj

Quote
RepRapRaj83
Another post on which i posted the same message (http://forums.reprap.org/read.php?154,86701) has suggested the firmware needs to be updated to over roughly 10 times my initial calculation.

Could any readers please post how much they have had to increase their e_steps_per_mm in the firmware for comparison as there is quite a difference between 85.8 and 430

They're probably using a different electronics set like RAMPS that uses 1/16 steps on the extruder stepper motor.