Featherweight Database

[big_nipper]

23Amps seems ok to me, I dont think that there is a problem as its only 207 Watts and they are rated for 750W Continuous, it depends on how effeicent the motor is running as this will determine the heat generated, and that can be checked holding your finger on it, if you burn it then its too hot I just checked a size 17 stepper motor this morning with only 2.4A at 5V and the case temperature of the motor was over 90C.

[robjones]

The motor is fairly warm, as are the heatsinks on it, after running for a minute.

[dragonmaster_1]

Right Sidewinder has now arrived, it lives. Just doing the mock up of the armour, pick on profile. Because of the weight problems with using Ev,s for the drive most of the armour will be Polypro with Hardox in the spinner zone.

[robjones]

just leave it as it is Tony, Im sure itll be fine

[dragonmaster_1]

Too late just ordered the polypro. Tomorrow will get some more discs for the grinder to start cutting the Hardox.

[dragonmaster_1]

Latest pic on profile

[andrewj]

Name: OverDrive
Wheels: 4x 100mm RoboChallenge blue wheels
Drive: 4x 14.4v cordless drill motors
Power: 2x 8.4v NiCads
Speedo: IBC
Weapons: Interchangeable scoops and wedges
Armour: 8mm Ali for the sides and main sections and 2mm Ali for the top and bottom. Maybe some 5mm Polycarb on the sides too.

Latest pics on profile, the guy who is building the chassis has made it a bit bulkier than we would have liked and Im not quite sure why there are two profiled ends, but Ive been told that will be fixed. Hopefully by next week Ill have some pics of the finished chassis and the scoops.

Critisize away... :wink:

[aliboy]

Aj How are you going to mount your drill motors ? A part from that it is looking very cool

[andrewj]

Quick diagram: http://www.picturevillage.com/photo/data/9db6faeef387dc789777227a8bed4d52/13817_p316944.jpghttp://www.picturevillage.com/photo/...bed4d52/13817_ p316944.jpg

Two ali boxes that clamp around the gearbox and then two screws do down to lock the two in place. Then inside the robot are four small pegs, each one slots into the centre of the wheel to keep it stable. Hard to describe but hopefully it will work. You can see one of the clamps in place in the bottom right of the profile pic.

Side view: http://www.picturevillage.com/photo/data/9db6faeef387dc789777227a8bed4d52/13817_p316946.jpghttp://www.picturevillage.com/photo/...bed4d52/13817_ p316946.jpg

Hope that explains it a bit better

[aliboy]

In my robot i was going to do something similar , but the design and limited space to work with stopped me doing it , I just made the double d shape of the gearbox and popped it throught , then put a m6 grub screw through the middle of the plastic , i really should post some pic of my bot , but i never do :sad: