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SoliForum - 3D Printing Community → Filastruder → Barrel rotating
I'm trying to work with PLA and it needs to melt a lower temp than ABS. The problem is that the temp that produces really consistent results is also the temp that causes the barrel to twist. Do I need to be worried about this? Should I just keep going until the hopper is nearly 90 degrees rotated from center?
Can't you tighten the barrel before starting? I do not have my Filastruder yet so that is entire speculation (guessing).
But it seems like if barrel twist is a problem then you do not have it tight enough to begin with.
Ralph
I still got barrel twist even after I tightened it as much as I possibly could. It's better to not risk putting a bend in the barrel trying to tighten it so much and just accept that you will need to readjust for twist a couple of times during the "burn in" period.
If you only tighten it on the side towards the flange like the instructions call for, you shouldn't bend it.
Sometimes I do have to let the motor finish the job. The nice part about the motor doing it is you get a pure couple, that is a rotation without translation - no net force.
Can't you just put a big heavy wrench on the barrel in such a way that gravity causes it to create a constant torque in the opposite direction it wants to twist? I'm just saying, if you know the barrel is going to twist and it only twists one way, why not pre-emptively counter that?
Sometimes I do have to let the motor finish the job
So Tim are you tightening the barrel to say 10:00 o'clock and letting the motor twist finish off at 12:00 o'clock?
Ralph
Basically, yes. I go as tight as I can by hand without massive tools, and then position the flange such that if the motor tightens it further, the barrel will rotate towards vertical.
I go as tight as I can by hand without massive tools
Are you still using water pump pliers backwards like your video shows or do you have a pipe wrench, so that you can apply some torque?
Ralph
I go as tight as I can by hand without massive tools
Are you still using water pump pliers backwards like your video shows or do you have a pipe wrench, so that you can apply some torque?
Ralph
I use channellocks like in the video, but on the flange side of the cutout to avoid barrel bending.
A rubber wrench helped me tighten the pipe into the collar.
Y
Should I just keep going until the hopper is nearly 90 degrees rotated from center?
To be clear, Tim has posted elsewhere that if this happens, then you can simply remove the bolts on the collar, rotate by 90 degrees and you're back in action. He said he designed the cutout and hopper such that if it is within 45degrees of vertical then things will work, so by being able to rotate the collar/flange by 90 degrees you can always get to within 45.
Obviously once it has twisted and locked itself it won't twist further.
Craig
SoliForum - 3D Printing Community → Filastruder → Barrel rotating
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