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Unread 07-03-2007, 17:25
Teched3 Teched3 is offline
Hodge1
FRC #0175 (BuzzRobotics)
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Smile Re: Anyone lost thier BaneBots Carrier pins?

Quote:
Originally Posted by Ben Piecuch View Post
Hodge,

I'm a little confused with what you're doing with the trannies... As I understand it you're doing the following:

- Using the replacement carrier plates, but discarding the pins
- Drilling New Holes for new dowel pins
- Rebuilding this modified carrier plate with new pins?

Is this correct? Also, you said that there is a possibility that Banebots is shipping out ANOTHER revision to this carrier plate? (I haven't heard anything of this...)

Personally, I like the tack welding idea. Now, if I can just find someone in the area who will do the welds for us (we don't have any welding ability/knowledge...)

BEN


Hi Ben,

We are modifying the new hardened plates with 4mm holes drilled and reamed in between the existing holes for the pins. We can't use the original pins as they are in the robot presently, so we got new pins at Atlantic Fastener ($0.31 cents each),but they have to be shortened 1 mm. As Banebots discussed with me, the holes are tapered from laser cutting, and the finish reamer didn't get to some of the surface. therefore, only an edge of the hole is holding the pin. Because of this "slop", I'm afraid welding will take the pin out of square with the plate, and Loctite doen't fill voids. Last time I tried to use the TIUG welder in school, it didn't work well at all. I could try welding your pins with MIG. If you made a collar longer than the pin, and a clamp that would allow access to weld, we might keep the pin perpendicular. Want to try?

With respect to the transmissions that will be coming, Banebots tells me they will have a 2nd revision hardened plate in them with properly sized holes. They are also considering putting tie bolts from the mounting plate corners to hold the plates square and tight to the tranny housing. The 8 screws don't presently do a good job of this.They cannot offer just the revised plates, as the manufacturer will not provide them. Looks like you will have to buy the whole transmission assembly to get it. That could change after the season, as time is short, and they are trying to meet the demand for Nationals. Who knows, by next year, they may have square holes and a square end on the output shaft as shown by Joe Johnson in some posted drawings, and make these transmissions the standard. Stick with these guys as they are willing to listen and make changes.