22-01-2015 09:44

eddie12390

Re: pic: The BoltBots Team 5040 Robot week 3 in the build !

What motor(s) are you using to power your lift and how many totes can you lift?

22-01-2015 10:05

GortGortGort

Re: pic: The BoltBots Team 5040 Robot week 3 in the build !

The build team has 3 different opinions about what will work best for the winch motor . As the mentor for the team I suggested each try out there motor and design on the robot to see which one works best . They are doing this today , so we will see . In the running is the new KOP gear motor with encoder ,CIM motor and 90deg. gear box , CIM motor and tough box.

22-01-2015 10:08

JamesCH95

Re: pic: The BoltBots Team 5040 Robot week 3 in the build !

CIM, not SIM.

Looks good!

Did you use a license plate for the corner gussets?

22-01-2015 10:15

GortGortGort

Re: pic: The BoltBots Team 5040 Robot week 3 in the build !

It is a street sign that was found in a ditch complete with shot gun blast and bullet holes in it . The students just thought it would be cool to build from as much recycled material as possible.

22-01-2015 10:27

GortGortGort

Re: pic: The BoltBots Team 5040 Robot week 3 in the build !

The lifting frame is made from Tele-Power poles that were acquired from dumpster diving at a office remodeling project . The 80/20 was surplus from a local college and other supporting parts are window frame extrusions found dumped in a vacant lot next to my house.

22-01-2015 10:55

earlybird

Re: pic: The BoltBots Team 5040 Robot week 3 in the build !

If you are still testing winch motors my team has had much success with a CIM motor attached to a gearbox from a Dewalt drill. There is a whitepaper out there somewhere on it. I believe Dr. Joseph Johnson(one of our old mentors) made it but I'm not entirely sure. We used this set up during breakaway to lift our entire robot off the ground with no trouble at all.

22-01-2015 11:27

GortGortGort

Re: pic: The BoltBots Team 5040 Robot week 3 in the build !

Quote:

Originally Posted by earlybird If you are still testing winch motors my team has had much success with a CIM motor attached to a gearbox from a Dewalt drill. There is a whitepaper out there somewhere on it. I believe Dr. Joseph Johnson(one of our old mentors) made it but I'm not entirely sure. We used this set up during breakaway to lift our entire robot off the ground with no trouble at all.

22-01-2015 19:47

lamk

Re: pic: The BoltBots Team 5040 Robot week 3 in the build !

For our elevator we are using a CIM with a 25:1 Vexpro VersaPlanetary gearbox driving sprocket and chain. The sprocket's pitch diameter is 1.79 inches. With a 40 lb load we can go up at 1.3 feet /sec measured. Our Pid controller puts out 15 % motor power to maintain the 40 lb load at set point. With 20lb load there is no motor output at setpoint with the talon set to brake.

23-01-2015 08:26

GortGortGort

Re: pic: The BoltBots Team 5040 Robot week 3 in the build !

Quote:

Originally Posted by lamk For our elevator we are using a CIM with a 25:1 Vexpro VersaPlanetary gearbox driving sprocket and chain. The sprocket's pitch diameter is 1.79 inches. With a 40 lb load we can go up at 1.3 feet /sec measured. Our Pid controller puts out 15 % motor power to maintain the 40 lb load at set point. With 20lb load there is no motor output at setpoint with the talon set to brake.

23-01-2015 11:46

lcoreyl

Re: pic: The BoltBots Team 5040 Robot week 3 in the build !

Quote:

Originally Posted by GortGortGort The lifting frame is made from Tele-Power poles that were acquired from dumpster diving at a office remodeling project . The 80/20 was surplus from a local college and other supporting parts are window frame extrusions found dumped in a vacant lot next to my house.