When I tell people we don’t make use of our second extruder on our FlashForge machines the response usually goes:
“But Why not? Think of all of the cool things you could do with two extruders! Don’t you like lot’s of colors, and dissolvable support material?”
My response is usually an astounding:
The reason for this is two fold:
1. The case of a print that lifts off of the bed, or thin flat features that bend upward from lack of cooling time (nearly unavoidable in some cases). The second nozzle has a tendency to drag across that raised portion and break the print, and or detach it from the build bed completely. The latter results in a sort of stalactite piggy back ride, in which the extruder Keeps on extrudin’, the head keeps on movin’ and the part keeps on growin’. Usually up into the extruder assembly, creating a huge mess.
2. With the shear volume of printing we do (much of it overnight, and un-attended), and the many students setting up and printing with the machines, it doesn’t make sense for us as a shop to make things any more complex than they need to be. To quote a great mind:
“Make everything as simple as possible, but not simpler.”
So with that as a goal, many hours of measuring, modeling, and a few iterations,
have resulted in a mod I have dubbed
“The Half Stepper”
I have been running versions of this mod on all of our PLA printers with excellent results. I have yet to measure the amount of weight it dropped off of the extruder assembly, but it’s minus one stepper motor, extruder mechanism, heater block, heater, and thermistor.
Want your own? You can find the STL Files Here:
Tags: Flash Forge Diagnostics, Flash Forge Hacks, Flash Forge LifeSpan, Flash Forge Maintenance, Flash Forge Modifications, Flash Forge Parts, Flash Forge Torture Tests, Flash Forge Troubleshooting, Flash Forge Tweaks