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stepper motors requiring more steps than it should

Posted by nick9one1 
stepper motors requiring more steps than it should
March 28, 2018 07:17PM
I'm having an issue with the amount of steps that are required by my extruder.

Long story short... I have a wanhao i3 2.1running on Ramps & Marlin with stock motors. E3DV6 and the Titan extruder.

I have my step count at 1036 to extrude the correct amount (100mm extrudes 100mm).

According to the documentation the titan extruder should only need 456 steps on a standard 200 step motor and 16x microstepping (A4988).

I have no slippage or skipping on the extruder. Prints come out fine, but something isn't right?
Whats going on?


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I decided to do a few upgrades.

Bowden
Ramps 1.4 to MKS Ramps (24v)
24V psu
Steppers to TMC2100 (apart from extruder)

All my step counts are correct apart from extruder, XYZ are 80,80,400.

I've tried different stepper drivers and currents to no avail

Before I changed to the titan I had step count at 250 for stock wanhao extruder. It should be 96.
Re: stepper motors requiring more steps than it should
March 29, 2018 03:55AM
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Before I changed to the titan I had step count at 250 for stock wanhao extruder. It should be 96.

Was that with the MKS board or with RAMPS? It seems you have issues with the extruder header. (cold solder joint?) Can you do the extrusion test again, but on a different header?
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