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4 775pro compact gearbox

Delr!n

By: Delr!n
New: 05-21-2018 07:18 PM
Updated: 05-21-2018 09:15 PM
Views: 1426 times


4 775pro compact gearbox

My goal with this was to make as compact and light of a gearbox as possible so a lot of things with it aren't the best so don't take it seriously

Weight:
4.86 pounds
Dimensions:
4.07"x 5.27"x 4.89"
Gearing:
12:100 14:26
Final Speed (Adjusted):
17.11Ft/s (4" wheels)

https://grabcad.com/library/4-775pro-compact-gearbox-1

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05-21-2018 08:43 PM

justin.chau


Unread Re: pic: 4 775pro compact gearbox

It definitely is compact! Unless I'm missing something, it doesn't really need 3 plates does it?



05-21-2018 08:54 PM

pkrishna3082


Unread Re: pic: 4 775pro compact gearbox

Quote:
Originally Posted by justin.chau View Post
It definitely is compact! Unless I'm missing something, it doesn't really need 3 plates does it?
Please correct me if I'm wrong, but it looks like the bottom two plates (the ones without motors bolted to them) are designed to fit around a 2x1 tube for integration into the chassis (presumably WCD).



05-21-2018 09:00 PM

justin.chau


Unread Re: pic: 4 775pro compact gearbox

Quote:
Originally Posted by pkrishna3082 View Post
Please correct me if I'm wrong, but it looks like the bottom two plates (the ones without motors bolted to them) are designed to fit around a 2x1 tube for integration into the chassis (presumably WCD).
Hm... I think you're right. I didn't pay close enough attention looking at it the first time around. Thanks for pointing it out! It's definitely an interesting way to do it.



05-21-2018 09:00 PM

gorrilla


Unread Re: pic: 4 775pro compact gearbox

How long did that take to render



05-21-2018 09:04 PM

Delr!n


Unread Re: pic: 4 775pro compact gearbox

Quote:
Originally Posted by gorrilla View Post
How long did that take to render
About 5 mins



05-21-2018 09:06 PM

Delr!n


Unread Re: pic: 4 775pro compact gearbox

Quote:
Originally Posted by pkrishna3082 View Post
Please correct me if I'm wrong, but it looks like the bottom two plates (the ones without motors bolted to them) are designed to fit around a 2x1 tube for integration into the chassis (presumably WCD).
This is exactly right but i didnt really think about chain lines so its shopping cart with chain in tube



05-21-2018 09:37 PM

gorrilla


Unread Re: pic: 4 775pro compact gearbox

Quote:
Originally Posted by Delr!n View Post
About 5 mins
Did you do that in SW? What lighting?



05-21-2018 09:40 PM

shiley


Unread Re: pic: 4 775pro compact gearbox

Looks like a great gearbox, but I would think about wire routing to the 775 pros. It doesn't look like the gearbox leave much, if any, room between the wire terminals of two of the motors and the tubing.



05-21-2018 09:56 PM

Delr!n


Unread Re: pic: 4 775pro compact gearbox

Quote:
Originally Posted by shiley View Post
Looks like a great gearbox, but I would think about wire routing to the 775 pros. It doesn't look like the gearbox leave much, if any, room between the wire terminals of two of the motors and the tubing.
If you look at the test frame i made there's some holes in the 2x1 where the terminals and wires go through



05-21-2018 09:57 PM

Delr!n


Unread Re: pic: 4 775pro compact gearbox

Quote:
Originally Posted by gorrilla View Post
Did you do that in SW? What lighting?
I did it in SW 2018 and i didnt touch the lighting



05-22-2018 12:30 AM

cbale2000


Unread Re: pic: 4 775pro compact gearbox

Whats the RPM of the output shaft?

Also, any chance you could upload this as a .step?



05-22-2018 12:50 AM

Delr!n


Unread Re: pic: 4 775pro compact gearbox

Quote:
Originally Posted by cbale2000 View Post
Whats the RPM of the output shaft?

Also, any chance you could upload this as a .step?
the output shaft is about 1100 rpm



05-22-2018 01:14 AM

Munchskull


Unread Re: pic: 4 775pro compact gearbox

Quote:
Originally Posted by Delr!n View Post
If you look at the test frame i made there's some holes in the 2x1 where the terminals and wires go through
interesting. Consider counter sinking the bolts not counter boring. Additionally if you you are just running 2 by 2 consider belt in tube.



05-23-2018 01:18 AM

InFlight


Unread Re: pic: 4 775pro compact gearbox

The power distribution panel only has 8 forty amp slots; so two of these four 775 motor drive train gearboxes wouldn't leave any 40 amp locations left for any game specific large motors.



05-23-2018 02:40 AM

RoboChair


Unread Re: pic: 4 775pro compact gearbox

Quote:
Originally Posted by InFlight View Post
The power distribution panel only has 8 forty amp slots; so two of these four 775 motor drive train gearboxes wouldn't leave any 40 amp locations left for any game specific large motors.
no point in 40 amps each when 30x4=120 just as 40x3=120



05-23-2018 02:01 PM

waialua359


Unread Re: pic: 4 775pro compact gearbox

Impressive compact gearbox indeed. Nice work!



05-23-2018 04:32 PM

Nathan Streeter


Unread Re: pic: 4 775pro compact gearbox

Would you be able to go to a larger gear on your output shaft (and get a higher reduction, if you want) by sliding the motors around to be closer to the opposite side of the gearbox?



05-23-2018 07:48 PM

Delr!n


Unread Re: pic: 4 775pro compact gearbox

Quote:
Originally Posted by Nathan Streeter View Post
Would you be able to go to a larger gear on your output shaft (and get a higher reduction, if you want) by sliding the motors around to be closer to the opposite side of the gearbox?
Yes that would be one way of gearing it down but it would increase its vertical hight



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