LEGO Object Measuring Robotic Arm

2.10 for the application (sorting bricks by size and colour)
4.00 for details

My Christmas Holiday Project! The arm can measure objects. It has a 360 degree waist, a 300 degree upper arm, a 180 degree lower arm, and a measuring gripper, accurate to the cm.

Note: The jerking when gripping and releasing bricks is caused by a 15 degree motor rotation left-right-left-right, at full power, which prevents the teeth clashing as the robot changes gear. This worked, but now works without the jerking, thanks to changing the motor turn to a single left-right at 30% power. I was in a rush to get the project done so I just overlooked the error until too late I suppose.

Category:

Howto & Style

Tags:

• Robotic
• arm
• Lego
• NXT
• technic
• measuring
• rotation

[MisterFitzGibbon]

@puter2dc Hello. The arm will work without it but you won't be able to measure objects. Alternatively, you can make a rotation sensor out of a touch sensor by putting one of those 4 toothed wheels on the end.

Hoping to get the instructions done over the next few weeks but I can't promise by then sorry (I have exams in Easter, after that I'll be free).

[puter2dc]

Can't wait for the instructions! I was wondering though, is there anything I can use in place of the rotation sensor? Is it really needed? At any rate, I'll be looking for the instructions! Thanks MisterFitzGibbon!

[MisterFitzGibbon]

@puter2dc Instructions are on there way!

[puter2dc]

One of the best NXT robotic arms I have seen, let me rephrase that, it IS the best I've seen!! Now for the BIG question I know a lot of people will be asking: any chance of getting the build instructions and the program for it? I am new to the NXT world, starting only a few months ago with the NXT 2.0. I'm just fasinated by everything this kit (and some additional parts) can do and what can be built with it. Any help on the build and program would be greatly appreciated. Thank you! David C.