temporary mini lathe motor control homemade.

[hobby]

Hi everyone, I've been working on a motor speed control for my mini lathe, because the board that I had in it finally blew out, after about 14 yrs. of hard use, I tried to order another one, but my minilathe, is outdated, so I can still get mechanical parts for it, but no more electronic speed controles for that size lathe.

I'm in the middle of a machining project, when this board blew out, so I needed to make a quick speed control with some torque control, (my version of torque control), to keep my lathe going.

I came up with this design, and built the whole system, and now I'm able to use my minilathe again.

With this project, I learned how to accomplish a design network for motor current feedback, to control the output voltage my circuit puts out to the motor, so as to increase motor voltage under load.

This system is only temporary to keep my lathe working,

However, I'm currently working on my PWM unit, for this lathe, now that I know how to design for motor current feedback, I can implement that into PWM, to give me the standard commercial, kind of electronic motor control with torque feedback, that these machines actually use.

Here is a quick video demonstration of this non standard way of motor speed control that I designed and built for temporary purposes of having my lathe working again.

[ame]https://www.youtube.com/watch?v=xFjQB9qELiY[/ame]


In the playlist on my channel I did the whole video series from concept to final build, of this speed control, the series is called "completed series: building lathe motor control circuit"

Enjoy...

 

[Wizard69]

This is pretty slick. I also realize that building such things is a lot of fun but you do realize that there are all sorts of motor controllers on the market that you can match to the motor in this machine.

 

[hobby]

Hi,

Thanks,

Yeh I know that the motor controls are out there, however if I can design my own motor control, I'm no longer under the burden of having to rely on a purchased product to keep my machines running.

For me, being able to use my hobby electronic skills to design my own circuit boards for my machines, is like making my own shop made tooling for my machines.