Let's Make Robots!

Anyone seen any links to using a lathe /mill machine to make a robot.

I have only found ONE link searching the whole web. I recently bought a 7X10 lathe/mill machine and would like to use it to work on my robots, but no info except general operations.  Any links would be apreciated.




Simple Control of a DC speed controller


I'm about to purchase 2x 12V motor speed controller to drive a remote control golf trolley (4QD Porter). They can be controlled via 0-5K resistor or 0-3v. I want to use a picaxe 28 to control the speed, what would be the easiest way to control them ?

I would prefer not to have a servo mechanically driving a pot, is there a simple solution.

Please assume total ignorance, i am very new to this.

Many thanks.

Ripsaw MS1

Ripsaw MS1


Imagine the 'H' bridges on this baby. More details here

Hello LMR

Hi LMR i just joined the site like a day or two ago and im starting to work on a robot named Scoots (going to add a blog post for that) but i been watching this site for atleast a week or two and i decided to join.

I need help

Hi all, there are problem i'm in laos and i need to try to make simple robot but i am a new student, my problem is in laos have not picaxe (CPU).. Tell me how i can do, please..

CNC/Prototyper for Cheap

I am making a robot that needs a kermillion custom parts and I have like no money. I have seen the reprap machine, and am interested.


(whats the difference between a reprap and a makerbot?)

 I have also seen a manual one that looks modifiable, but not as user friendly, for much more money.

Any suggestions?


H-Bridge IC making DC motors run slow (TA7267)

I'm using a TA7267 (H-Bridge) to drive a small Mabuchi DC motor. I'm suplying the IC with a reference voltage of 3V, and the operational voltage is 5V. The terminals of the DC motor are connected directly to the OUT1 and OUT2 pins. However, the motors are working pretty slow.

I've been checking the datasheet and they suggest you can add a resistance in parallel to the motor, but I don't know what value it should be, and if it would make a difference. Any idea why this would happen? 



 Can i use a PC controller windows, as a microcontroller.

Concept Design Software

I discovered this really cool software called AutoDesk Sketchbook Pro 2010. Its great for putting your concept ideas down. I have to get use to drawing with a stylus yet. I am going to use this on my project ideas at school. Its pretty inexpensive also. Here is my first attempt at drawing something.

concept design