Urgent: Extruding PLA too slow (1st print ever)

Hi.

I have finally finish buiilding my prusa i3.

On my first print with PLA, the extruder is too slow.

Why is that? Could anyone help me fix it? I am using wade's reloaded extruder and gadgets3d buda-style hotend.

This could be a firmware problem?

if yes, the configuration.h on my marlin is in [pastebin.com]

Sorry if this is a easy answer. I am a newbie, and this is my first print ever. Thanks.


EDIT: here is the video: [www.dropbox.com]

Edited 2 time(s). Last edit at 06/15/2013 09:21AM by Crux.

It is going to be line 270. The forth number is your steps for the extruder. I haven't used a wades in a long time and cannot tell you what it needs to be.

Thank you for the reply.

This is the default for that line:

#define DEFAULT_AXIS_STEPS_PER_UNIT {78.7402,78.7402,200.0*8/3,760*1.1}

I have successfully configured X Y and Z steps, so this is whay i currently have:

#define DEFAULT_AXIS_STEPS_PER_UNIT {80,80,4000,760*1.1}

So, all i am missing is the formula to calculate the correct steps for the E motor. Any ideas on how to calculate it? I have greg's wade reloaded extrusor.

Thanks

Why is this urgent?

The way I figured out my theoretical extruder steps/mm was with this equation I attached as a picture. You must remember though that it is theoretical and that you most likely will have to tune it a little bit, but I found it worked very well as a base line for me.

Thank you both for the replies.

I have just done an update on my own configuration.h to make it more flexible. All we need to do is change the proper values:

#define MOTOR_STEPS_REV {(200 * 16)}
#define PULLEY_PITCH {2}
#define PULLEY_TOOTH {20}
#define E_BIG_GEAR_TEETH {47}
#define E_SMALL_GEAR_TEETH {9}
#define Z_ROD_PITCH {0.8}
#define HOBBED_BOLT_TOOTH_DIAMETER {6.9}
#define XY_STEPS_PER_UNIT {MOTOR_STEPS_REV / (PULLEY_PITCH * PULLEY_TOOTH)}
#define Z_STEPS_PER_UNIT {MOTOR_STEPS_REV / Z_ROD_PITCH}
#define E_STEPS_PER_UNIT {(MOTOR_STEPS_REV * E_BIG_GEAR_TEETH / E_SMALL_GEAR_TEETH) / (3.1415926535 * HOBBED_BOLT_TOOTH_DIAMETER)}
#define DEFAULT_AXIS_STEPS_PER_UNIT {XY_STEPS_PER_UNIT, XY_STEPS_PER_UNIT, Z_STEPS_PER_UNIT, E_STEPS_PER_UNIT}


feel free to share this. I havent tested this values yet, but i will.

thanks.

greenman100 Wrote:
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> Why is this urgent?


I had people trying to help in here. Not anymore now.

Nice way of changing your values, I really like it.

Follow the instructions for calibrating your extruder using one of the many sources available. A generic number for your machine may work though for best results you need to get the actual number for your particular machine. Not a machine like yours, but your actual machine. I use this...

[richrap.blogspot.com]


Many don't follow the calibration instructions and want to shortcut and get printing. This will only cost time and grief in the long term.There is a reason the calibration procedure exists and to get optimal results (or in most cases any sort of result) it is mandatory that one follows those procedures as part of commissioning the machine.