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roboticlemon / cmd-robot

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Motors and torque #8

Closed GoogleCodeExporter closed 9 years ago

GoogleCodeExporter commented 9 years ago 
Here is some information:

- All we know is the exact weight of the large motors that have 55rpm@ 55kg/cm 
is 320 grams which will equal ~1.3 Kg in total.

- We also know that the Batteries each weigh ~600 grams which equals ~2.4 Kg in 
total.

- Total weight so far:  3.7 Kg

- We do not know the weight of anything else as it stands today.

- I estimate the approximate weight of my Robot to be < 6 Kg (excluding Cargo) 
and approximately <7 Kg (with Cargo).

This means that I will need a maximum of 8 Kg torque / 4 motors = 2 Kg torque 
for each motor.   There is also a current limit of currently 1.1 Amps for each 
motor.

Please translate any of this information and give feed back.

@wallarug

Original issue reported on code.google.com by cian.by...@sydstu.catholic.edu.au on 12 Nov 2012 at 6:41

GoogleCodeExporter commented 9 years ago 
http://www.pololu.com/catalog/product/1102/specs

Original comment by cian.by...@sydstu.catholic.edu.au on 12 Nov 2012 at 6:45

GoogleCodeExporter commented 9 years ago 
Are you trying to say you want different motors or what?? I think we should 
worry about the motors specifics last because we will see how they operate in 
the real world! We can always switch them out etc.

Original comment by hacker16...@gmail.com on 12 Nov 2012 at 6:48

GoogleCodeExporter commented 9 years ago 
This issue is of the highest priority, The motors need to be ordered today if 
we want them in the next two weeks.  Otherwise the project will be delayed 
dramatically.

Original comment by cian.by...@sydstu.catholic.edu.au on 12 Nov 2012 at 6:51

GoogleCodeExporter commented 9 years ago 
Here's the plan: 

http://www.pololu.com/catalog/product/1102/specs *4

http://www.pololu.com/catalog/product/1435 *4

http://www.pololu.com/catalog/product/1084 *4

http://www.pololu.com/catalog/product/1075 *2

http://www.pololu.com/catalog/product/1083 *4

http://www.pololu.com/catalog/product/1962 *2

I think this is the go...

Check it out now and let me know... I am going to order before the day is out.

Original comment by cian.by...@sydstu.catholic.edu.au on 12 Nov 2012 at 7:23

GoogleCodeExporter commented 9 years ago 
Costings...

Original comment by cian.by...@sydstu.catholic.edu.au on 12 Nov 2012 at 7:36

Attachments:

GoogleCodeExporter commented 9 years ago 
This has been solved.  Motors and mounts have been ordered.
List:
- Screws
- Motors (19:1 --@500rpm --5kg/cm torque)
- A special 30A double H-bridge Arduino 
Shield...http://www.pololu.com/catalog/product/2502
- mounts for 37D motors

Should arrive for Wednesday afternoon.

Original comment by cian.by...@sydstu.catholic.edu.au on 16 Nov 2012 at 1:22