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Andrew Blair
07-11-2005, 21:42
I'm currently working on an endcap much like the ones included with the kitbot, but adapted to hold 20-20 extruded. My question pertains to bend radius annotation. The kitbot's bends are labeled as .62 r, but what does this mean? I've measured the radius of the actual bends to be about 1/16", so is this annotation a coefficient you put in front of the actual material thickness (1/8 by .62 is around a 1/16" bend)? I'm assuming so, but we know what assume does...
Jeff Pahl
07-11-2005, 22:57
1/16" = 0.062(5). It's probably a typo where someone dropped the 0
Andrew Blair
07-11-2005, 23:30
Wow, I feel dumb now. Thanks, that would make alot of sense.
JVN
08-11-2005, 00:30
1/16" = 0.062(5). It's probably a typo where someone dropped the 0

This is correct.
The bend radii is determined by the die used in the sheet-metal break.
Our typical sizes are .032", .046", .062", etc...

Andrew,
Where is this misnotated?
How sloppy of me.

JV
Andrew Blair
08-11-2005, 09:57
It's in the chassis part drawings pdf. Chassis Parts (http://www.ifirobotics.com/docs/FRC2005-KITBOT-CHASS.pdf)

No big problem, I just didn't quite understand what was meant, and thought I'd try to learn how such bends were labeled.

By the way John, I was extremly impressed with the performance of the kit frame! I originally thought, like many others, that it would not hold up, but it has been the most reliable frame we have had to date! I'm looking to couple the best of both worlds in my modification: Multi-axis strength with the item extruded and it's fastener ease, with the incredible strength of the endcaps and the frame shape they foster.
meaubry
08-11-2005, 13:30
John,
The error is in the notes section on each drawing.
At least you were consistant - all of them indicate the bend radii is 0.62 (Where's a good checker when ya need one?) Sorry, couldn't resist. I know it's tough being both designer and checker.

Mike
JVN
09-11-2005, 10:21
John,
The error is in the notes section on each drawing.
At least you were consistant - all of them indicate the bend radii is 0.62 (Where's a good checker when ya need one?) Sorry, couldn't resist. I know it's tough being both designer and checker.

Mike

Mike,
Yeah, I just noticed that.
Obviously our manufacturing guys weren't confused by the error. ;)
"They knew what we meant." (Isn't it dangerous, when metal guys "know better" than the engineers?)

JV