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Extruder run differently with same configuration

Posted by cthsieh 
Extruder run differently with same configuration
July 05, 2017 07:36PM
Dear All,
Recently, I am working on building a delta printer which has a nozzle associated with two extruders.
It means the machine can allow one nozzle to extrude two different filaments.
The hardware has been installed well, but there are a lot of unexpected errors during configuring the marlin for the machine.
The attachment is the configuration.
The marlin passed the compiling.
the machine does work, but not correctly.
My machine has two same models of extruders.
I configured them by same parameters.
Unfortunately, They works differently when I tested them by Repetier-host.
I sent the command to ask them to extrude 100 mm filament.
the extruder 1 is OK, but extruder 2 always extrude more filament and run faster.
They were configured by same values and parameters. I don't know why they run differently.
I tried to switch the hardware of extruders to check if the extruders are different, but the result shows that the extruders are same.
Can anyone can explain this strange event? Thank you.
The attachment is my configuration.
Attachments:
open | download - Configuration.h (63.1 KB)
Re: Extruder run differently with same configuration
July 13, 2017 02:35PM
Did you verify that driver micro-stepping is the same for both?
Re: Extruder run differently with same configuration
July 13, 2017 10:05PM
Dont bother mate, they asked the same question in 10 other threads and was given the answer in at least 3 of them
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