Scale up question:
The central axis of the machine is a hollow plastic shaft that's printed as part of hub_bottom. The shaft appears to be 15mm in diameter. I'm *guessing* that scaling up that shaft diameter would be a good idea on a 2X larger printer. 25 mm and 30 mm seem like pretty good candidates for a scale up from the standpoint of bearings to replace the 15mm 6702's.
So now the questions:
Is the shaft dimensioned based on the need to mount the hot end on the bottom or is it critical? (Do I need to scale it or not?)
If I need to scale it, is 1.5X (25mm) good enough or is 2X (30mm) the way to go?
Yes, I could go to something completely different. I'd prefer to go in as few directions at once as possible. The more I can retain from the original the better. At this point scaling is ok. Machining a different design from a solid block of tool steel - not so much.
The central axis of the machine is a hollow plastic shaft that's printed as part of hub_bottom. The shaft appears to be 15mm in diameter. I'm *guessing* that scaling up that shaft diameter would be a good idea on a 2X larger printer. 25 mm and 30 mm seem like pretty good candidates for a scale up from the standpoint of bearings to replace the 15mm 6702's.
So now the questions:
Is the shaft dimensioned based on the need to mount the hot end on the bottom or is it critical? (Do I need to scale it or not?)
If I need to scale it, is 1.5X (25mm) good enough or is 2X (30mm) the way to go?
Yes, I could go to something completely different. I'd prefer to go in as few directions at once as possible. The more I can retain from the original the better. At this point scaling is ok. Machining a different design from a solid block of tool steel - not so much.