22-05-2015, 03:10
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no bag, vex only, final destination
AKA: Pinecone
 FRC #0228 (GUS Robotics); FRC #2170 (Titanium Tomahawks) Team Role: Mentor
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Join Date: Dec 2008
Rookie Year: 2006
Location: Glastonbury, CT
Posts: 7,601
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Re: Waterjet accuracy?
I can't actually answer your question at the moment, though maybe if I'm nice enough I can run some waterjet parts over to RPI's DMM and find out...
However, I can attest to gearboxes working with waterjet plates. The reason for this is pretty simple. It's one of those things that you can get away with in FRC due to the extremely short run time of an FRC robot. While in the real world, you wouldn't want to run a gearbox for 10,000 hours with +/-.003 tolerances, it's usually fine to run waterjet gearboxes for FRC purposes.
The taper (kerf?) is a real phenomena, but it's usually slight enough to ignore. For bearing holes, one should ream out everything they make anyway if they want a true precise press fit, so the taper isn't a big deal.
Our waterjet parts (relatively few each year) are reasonably accurate. Hole centers are located properly, if not the sizes themselves. I'd be comfortable doing just about anything 2D used on an FRC robot on a waterjet.
__________________
Mentor / Drive Coach: 228 (2016-?)
...2016 Waterbury SFs (with 3314, 3719), RIDE #2 Seed / Winners (with 1058, 6153), Carver QFs (with 503, 359, 4607)
Mentor / Consultant Person: 2170 (2017-?)
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College Mentor: 2791 (2010-2015)
...2015 TVR Motorola Quality, FLR GM Industrial Design
...2014 FLR Motorola Quality / SFs (with 341, 4930)
...2013 BAE Motorola Quality, WPI Regional #1 Seed / Delphi Excellence in Engineering / Finalists (with 20, 3182)
...2012 BAE Imagery / Finalists (with 1519, 885), CT Xerox Creativity / SFs (with 2168, 118)
Student: 1714 (2009) - 2009 Minnesota 10,000 Lakes Regional Winners (with 2826, 2470)
2791 Build Season Photo Gallery - Look here for mechanism photos My Robotics Blog (Updated April 11 2014)
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