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View Full Version : pic: 2 Speed Rev 2

R.C.
19-09-2010, 17:42
[cdm-description=photo]35898[/cdm-description]
gallo26
19-09-2010, 17:44
You know RC... I'm not surprised by this ;) Your CAD always looks amazing! Your work is very impressive! Very clean and elegant!
Chris is me
19-09-2010, 18:13
Nice model / gearbox!

How often did you guys play at 16FPS? When looking into drive boxes this year, I was looking at the 6 motor setup, but it seemed that adding 6 motors let you run at ~9.5 FPS while pretty close to traction limited. Was the high gear useful for your team, or just something nice to have?

Also, can I have two? :)
Ether
19-09-2010, 21:39
-16 FPS and 8 FPS

what are the gear ratios ??
R.C.
20-09-2010, 02:58
Nice model / gearbox!

How often did you guys play at 16FPS? When looking into drive boxes this year, I was looking at the 6 motor setup, but it seemed that adding 6 motors let you run at ~9.5 FPS while pretty close to traction limited. Was the high gear useful for your team, or just something nice to have?

Also, can I have two? :)

Chris,

Hmm interesting question, I don't know if we ever got up to the full 16fps. I don't have anything quantitative but:
-We were quick
-The acceleration was amazing
-It was nice being able to get from one side of the field to the other rather quickly.

In a match we stayed in high gear the whole time except crossing the bump and pushing. Our driver absolutely loved having the high gear and we would not hesitate to gear this high again. Lol, sure Chris to go?

what are the gear ratios ??



Ether,

I added more info to the pic:

-6 Inch Wheel
-Initial: 12:50
-Shfiter: 28:48 & 16:60

-RC
topgun
21-09-2010, 09:57
How do you do the shifting? Pneumatics, servo motor, or some other means? Did you cut the gears or use off the shelf gears?

Looks nice.

- T
R.C.
21-09-2010, 10:59
How do you do the shifting? Pneumatics, servo motor, or some other means? Did you cut the gears or use off the shelf gears?

Looks nice.

- T

The shifting is done with pneumatics and all the gears used in this render/model are bought off the shelf.

-RC
topgun
21-09-2010, 15:16
Can you show some alternate views of the gearbox?
steelerborn
24-09-2010, 01:25
Dude looks sick!

I am learning SolidWorks at school now, Its a really nice program.
sanddrag
25-09-2010, 00:36
Can you get rid of any of the standoffs in there to simplify it a bit, and reduce the parts count?
mplanchard
25-09-2010, 15:30
Hi RC

Thank you for sharing. You have been busy. If you did this with SolidWorks Photoview 360 you really should put this image up on www.solidworksgallery.com. Very nice work. Marie
Chris is me
25-09-2010, 16:20
One more question: Why two 1/4 plates and not 1/8 plates with bearing shims? I haven't made many gearboxes or anything, so I'm trying to look into the advantages of one over the other.
J93Wagner
28-09-2010, 19:36
@Chris - If I had to take a guess as to why there are no flanges, I would say it has something to do with DFMA as not every team has easy access to bending parts accurately (we certainly don't), or ease of access and assembly.

Also, what exactly is the plate thickness? I need to know for a project I'm working on. Nice gearbox btw.
R.C.
29-09-2010, 02:15
Can you get rid of any of the standoffs in there to simplify it a bit, and reduce the parts count?

David,

This gearbox was made for our 2010 robot. The only reason for the extra four standoffs are just so the gearbox stays together at all times. The other four standoffs are just purely for mounting.

If I was going to do this again, It would not have as many spacers.

Hi RC

Thank you for sharing. You have been busy. If you did this with SolidWorks Photoview 360 you really should put this image up on www.solidworksgallery.com. Very nice work. Marie

Marie,

It was indeed rendered with Photoview 360, I'll definitely put it up when I get a chance.

One more question: Why two 1/4 plates and not 1/8 plates with bearing shims? I haven't made many gearboxes or anything, so I'm trying to look into the advantages of one over the other.

Chris,

The reasons why I use 1/4" Plate over 1/8" Plate

-Stiffer
-Can be tap'd
-Thickness for bearing
-Allows for counterbores

@Chris - If I had to take a guess as to why there are no flanges, I would say it has something to do with DFMA as not every team has easy access to bending parts accurately (we certainly don't), or ease of access and assembly.

Also, what exactly is the plate thickness? I need to know for a project I'm working on. Nice gearbox btw.

This is 1/4" Plate.

Thanks,

-RC
Mike Marandola
01-10-2010, 09:41
sick model dude!!:)
Snalios
08-10-2010, 12:38
I like this.