Thursday, March 16, 2017


This month with snow and cold allowed me to spend some more quality time with my computer. A few topics that have been sitting in my Work in Process pile for a long time came to the fore. The first is my Belt Grinder Motor Guide. It's an effort to answer some of the many questions that arise when makers start down the "I am going to build me a belt grinder" path. Motors are complex, yet with some basic knowledge you can make a decision on the suitability of a motor before you buy.

Another page that's come through the pipe is Part 5 of the VFD series called VFDs: Part 5 - Remote Control. This segment is all about speed control and remote start/stop for your VFD. The tutorial is mostly generic, with a focus on the popular TECO Westinghouse L510 VFD.

Hope to be back in the shop soon as warmer weather comes our way. I've got a belt release lever coming for the BG-272 and a variable speed grinder wheel turning machine that uses a DC treadmill motor. Lots of exciting stuff.

As always, if you have a question or want to fire a comment off, your input is always appreciated!



alfanje said...

Always, thanks !!!!

Unknown said...

Thank you for your time and effort in this blog.

Marc said...

Hi Dan.

Your work is appreciated. Thank you.

After reading for a while on the net I decided I will base my belt grinder on your plans. I bought some steel this morning. I have a treadmill DC motor and controller but I hesitate to use it as it is not TEFC. What do you think? Thank you.

Unknown said...

Hi Dan.
Thanks for this blog and the big work you're doing.
Guestion to your BS 272: Does it work with the euripean belts 50 x 1600 mm and 50 x 2000 mm??

D. Comeau said...

Hi Donald.

This design will work with the 2000 mm belts. However it is not recommended for use with the 1600 mm belts.


D. Comeau said...

Hi Marc,

Treadmill motors in my experience have a few problems. One they are open as you suggested and two they prone to slow recovery when worked hard. Induction motors always work to catch up to the power line frequency, whereas permanent magnet motors sometimes do not have speed compensation (feedback) to help them quickly recover from loading. Three, they are not easy to couple a useful drive wheel to.

If I could make a recommendation it would be go with a two pole TEFC induction motor in NEMA frame 56 or 143T. You really can't go wrong with a sealed motor.


Unknown said...

Hi again Dan.
Thanks for your quick anwser.
This blog is a wery big help for a upcomming knifemaker here in Denmark.
Thanks again.

Frank C. Bigelow said...

Dan, can't thank you enough for sharing your time and knowledge to helping others lessen the arts of knife making and DIY equipment! Huge fan!

D. Comeau said...

Thanks for your kind words Frank.

Happy making!