Globe Busted

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Posted by Robert Masek.

Student on team #151, r2k, from nashua high and sanders/nashua.

Posted on 2/25/2000 6:26 AM MST



We use two globe motors on our robot. The way they are used they have a tendancy to break. Specifically the three gears that power the output shaft. Our team has looked all over the place for replacments. But, we have not found the motor. At this point we would like to know if there is anyteams that no of a source to find the little orbital gears( we prefer them to not have there teath chewed out.) Anyinput would be apriciated.
Thanks BD~ 151 Hailcow@aol.com

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Posted by Joe Johnson.   [PICTURE: SAME | NEW | HELP]


Engineer on team #47, Chief Delphi, from Pontiac Central High School and Delphi Automotive Systems.

Posted on 2/25/2000 7:59 AM MST


In Reply to: Globe Busted posted by Robert Masek on 2/25/2000 6:26 AM MST:



GM service parts carries the Globe Motors as part of a transfer case actuator for some GM trucks.

Follow the link below for the part number.

Joe J.

For reasons unclear to me, I can't get the message board to include my link. Copy & Paste it from below instead

http://www.chiefdelphi.com/wwwboard/messages/1684.html

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Posted by Bill Beatty.

Other on team #71, Team Hammond, from Team Hammond.

Posted on 2/25/2000 8:49 AM MST


In Reply to: Been there done that. posted by Joe Johnson on 2/25/2000 7:59 AM MST:



The Globe output shaft not only doesn't handle side loads well, it relies only on the press fit of the bushing to loacte the output shaft. If subjected to axial loading can spell trouble.

Bill B

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Posted by Robert Masek.

Student on team #151, r2k, from nashua high and sanders/nashua.

Posted on 2/25/2000 8:02 PM MST


In Reply to: Globe Tip posted by Bill Beatty on 2/25/2000 8:49 AM MST:

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Posted by Joe Johnson.   [PICTURE: SAME | NEW | HELP]


Engineer on team #47, Chief Delphi, from Pontiac Central High School and Delphi Automotive Systems.

Posted on 2/26/2000 6:13 AM MST


In Reply to: Re: Globe Tip posted by Robert Masek on 2/25/2000 8:02 PM MST:



Bevel gears put BOTH side loads and axial loads on the shaft.

This is the worst case possible.

How big is the bevel gear on the globe motor and what is the bevel angle?

If the pinon is small and the angle is relatively flat, this could the a real source of problems.

Is there any way that you can get a bearing on the far end of the shaft? It does not have to take all the load, but it had to be able to help support the shaft.

Joe J.

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Posted by Bill Beatty.

Other on team #71, Team Hammond, from Team Hammond.

Posted on 2/26/2000 10:28 AM MST


In Reply to: Worst of both worlds!- posted by Joe Johnson on 2/26/2000 6:13 AM MST:



If the thrust of the bevel gear is taken on the shaft or bronze bushing, it could be your problem. Also, watch the length of the mounting screws going into the face of the globe. Too long is trouble. The globe is a great, compact power source, but application critical.

Bill B