Topic: + or - 0.01mm Tolerances
This weekend (2/8/15) I made some 1.75mm MG94 and 1.75mm recycled (80% MG94 20% regrind) filament. Before extrusion I pre-dried both the regrind and MG94 for about 18 hours in this dehydrator Link: http://www.amazon.com/Presto-06300-Dehy … dehydrator .
Here is a good write up about pre-drying I did a while back:
Many different types of plastics need to be pre-dried in order to get good quality filament and prints. The plastics that encounter frequently that need pre-drying are PLA, Nylon, TPU, and PC (polycarbonate). There are several more plastics that need to be pre-dried, but for simplicity I only listed a few. I used a food dehydrator I bought off of Amazon to dry all of my pellets. http://www.amazon.com/Presto-06300-Dehy … dehydrator . The dehydrator comes with mesh plates, so you need to find a way to stop the pellets from falling through. I use this: http://www.amazon.com/National-Presto-D … ZNA913RBA. I usually let the pellets dry for about 10-17 hours. After drying I seal the pellets in a zip lock bag with a silica gel packet inside, and add a label so I know what plastic it is.
The end result of the drying was filament with an average diameter of 1.75 with + or - 0.01mm tolerances.
Picture of the dehydrator:
Picture of the finished filament:
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