<p>It is really strange that although you <em>increased</em> the steps per mm, the amount extruded was <em>less</em>. I can think of two possible explanations:</p>

<ul>
<li><p>You are extruding too quickly, at a rate at which the extruder can't keep up melting the filament fast enough, causing the filament to slip or the extruder to miss steps: try lowering the feedrate (a feedrate like 100mm/min is typical for 1.75mm filament) and make sure that the temperature is appropriate to your filament.</p></li>
<li><p>You are in absolute coordinate mode, and when you try to extrude 100mm it actually extrudes a different amount (based on the previous "position" of the extruder). Enter relative coordinate mode using G91.</p></li>
</ul>

CC BY-SA 3.0
2016-03-26T20:12:29.707Z
I am using abs with an extruder temp of 210. I found that my feedrate was set to 1 I remember changing this when I first got the printer so i changed it back to 2. But the way you are describing it should be like 1.6 something right?
Dakota Miller
CC BY-SA 3.0
2016-03-26T20:33:42.233Z
The "1" value is *not* your feedrate. That probably is your extrusion multiplier. Don't mess with that (leave it a 1) until you get your esteps approximately correct.
Tom van der Zanden
CC BY-SA 3.0
2016-03-26T20:52:06.893Z
When i go to configuration then down to feedrate on the lcd it says max:1 home:2
Dakota Miller
CC BY-SA 3.0
2016-03-26T21:11:52.907Z
The feedrate that I'm referring to is simply the feedrate you set with a G-code command, e.g. ``G0 E100 F100``.
Tom van der Zanden
CC BY-SA 3.0
2016-03-26T21:37:36.200Z
Oh ok i think i understand what im doing wrong then. I have been using the lcd to extrude 100mm and not the software on the pc. Could that be it?
Dakota Miller
CC BY-SA 3.0
2016-03-26T21:49:04.323Z
Possibly, it depends on the feedrate that is used when the LCD extrudes. You could try turning the LCD's knob very slowly so the 100mm is extruded slowly as well.
Tom van der Zanden
CC BY-SA 3.0
2016-03-26T23:12:11.670Z
Kk ill try out the code first and see if that fixes it.
Dakota Miller
CC BY-SA 3.0
2016-03-27T01:22:46.053Z
Ok so it was the temp for the abs i had it set to 210c i turned it up to 220c, now the calculations are making aense now.
Dakota Miller
CC BY-SA 3.0
2016-03-26T17:21:34.873Z
2016-03-26T17:21:34.873Z
Tom van der Zanden
<p>I understand you marked at 120mm then tried to extrude 100mm and measured 37.66mm remaining.  Take the 120mm - 37.66mm (remaining)= 82.34mm (that was extruded (so you were 17.66mm short of your 100mm).</p>

<p>The formula I use is [New Setting=(Wanted Distance X old setting)/ Actual Distance].</p>

<p>So [New Setting = (100 x Old Setting)/82.34.]</p>

<p>Hope this helps</p>

CC BY-SA 4.0
2018-09-27T20:21:39.070Z
2018-09-27T20:21:39.070Z
Dennis
<p>I have done the calibration for the x, y, and z axis and everything works fine there. However when I went to do the calibration for extruder things got a little weird. The original number programmed on the board for the step per mm was 98 When I did my first measurements I used 120mm as the mark on the filament then extruded 100mm then remeasured the mark it was 37.66. Then by using the new_e_steps = old_e_steps * (100/(120-distance). I would use the new number and upload it to the printer which was 119.0187. After that I took another measurement, the new measurement was 61.27mm after marking 120mm then extruding 100mm of filament. Using the formula it came out to be 202.6540. Then the new measurement was some where around 80 some MM. It seams that the more I do the calibration the less accurate it gets. What am I doing wrong here?<a href="http://reprap.org/wiki/Triffid_Hunter%27s_Calibration_Guide" rel="nofollow">Triffid Hunters Calibration</a> is the guide I have been using and this link is to the specifications to the printer <a href="https://www.3dprintersonlinestore.com/reprap-prusa-xi3" rel="nofollow">HE3D Prusa XI3</a>.</p>

<extruder><prusa-i3><calibration>
Prusa XI3 Extruder Calibration
Dakota Miller
# Prusa XI3 Extruder Calibration

(Asked by: username_0 on 2016-03-26)

I have done the calibration for the x, y, and z axis and everything works fine there. However when I went to do the calibration for extruder things got a little weird. The original number programmed on the board for the step per mm was 98 When I did my first measurements I used 120mm as the mark on the filament then extruded 100mm then remeasured the mark it was 37.66. Then by using the new\_e\_steps = old\_e\_steps \* (100/(120-distance). I would use the new number and upload it to the printer which was 119.0187. After that I took another measurement, the new measurement was 61.27mm after marking 120mm then extruding 100mm of filament. Using the formula it came out to be 202.6540. Then the new measurement was some where around 80 some MM. It seams that the more I do the calibration the less accurate it gets. What am I doing wrong here?[Triffid Hunters Calibration](http://reprap.org/wiki/Triffid_Hunter%27s_Calibration_Guide) is the guide I have been using and this link is to the specifications to the printer [HE3D Prusa XI3](https://www.3dprintersonlinestore.com/reprap-prusa-xi3).

**Tags:** extruder, prusa-i3, calibration


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## 2 answers

### Answer by username_1 on 2016-03-26. Score: 1 | Accepted answer

It is really strange that although you *increased* the steps per mm, the amount extruded was *less*. I can think of two possible explanations:

* You are extruding too quickly, at a rate at which the extruder can't keep up melting the filament fast enough, causing the filament to slip or the extruder to miss steps: try lowering the feedrate (a feedrate like 100mm/min is typical for 1.75mm filament) and make sure that the temperature is appropriate to your filament.
* You are in absolute coordinate mode, and when you try to extrude 100mm it actually extrudes a different amount (based on the previous "position" of the extruder). Enter relative coordinate mode using G91.

> **Comments:**
> **username_0**: I am using abs with an extruder temp of 210. I found that my feedrate was set to 1 I remember changing this when I first got the printer so i changed it back to 2. But the way you are describing it should be like 1.6 something right?  
> **username_1**: The "1" value is *not* your feedrate. That probably is your extrusion multiplier. Don't mess with that (leave it a 1) until you get your esteps approximately correct.  
> **username_0**: When i go to configuration then down to feedrate on the lcd it says max:1 home:2  
> **username_1**: The feedrate that I'm referring to is simply the feedrate you set with a G-code command, e.g. ``G0 E100 F100``.  
> **username_0**: Oh ok i think i understand what im doing wrong then. I have been using the lcd to extrude 100mm and not the software on the pc. Could that be it?  
> **username_1**: Possibly, it depends on the feedrate that is used when the LCD extrudes. You could try turning the LCD's knob very slowly so the 100mm is extruded slowly as well.  
> **username_0**: Kk ill try out the code first and see if that fixes it.  
> **username_0**: Ok so it was the temp for the abs i had it set to 210c i turned it up to 220c, now the calculations are making aense now.  

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### Answer by username_2 on 2018-09-27. Score: 0

I understand you marked at 120mm then tried to extrude 100mm and measured 37.66mm remaining. Take the 120mm - 37.66mm (remaining)= 82.34mm (that was extruded (so you were 17.66mm short of your 100mm).

The formula I use is [New Setting=(Wanted Distance X old setting)/ Actual Distance].

So [New Setting = (100 x Old Setting)/82.34.]

Hope this helps


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