Router Forums - Reply to Topic
Thread: Will a speed control work Reply to Thread
Title:
Message:
Post Icons
You may choose an icon for your message from the following list:
 

Register Now



In order to be able to post messages on the Router Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










  Additional Options
Miscellaneous Options

  Topic Review (Newest First)
04-03-2019 10:11 PM
mjadams61
Quote:
Originally Posted by chessnut2 View Post
Thanks for this, Marlin. I've been wondering if something like this was available.
Your Welcome
03-07-2019 03:00 PM
Cherryville Chuck A hand drill is a universal motor so a speed control will work with them. How about building a frame to hold one of them so that you can run it hands free?
03-07-2019 01:23 AM
malb
Quote:
Originally Posted by MikeMa View Post
First off, I would NOT recommend trying this.....

That said, a guy I knew had a combination mill/metal lathe that had mechanical, but limited, speed control, with an induction motor. He put one of the router speed controls that you can get cheap at Harbor Freight. He makes sure it is set a full speed, turns the machine on, and proceeds to slow the motor with it. I was amazed he did that with out smoking the motor!

So, while it TECHNICALLY worked, he is very likely adding a LOT of extra heat to the motor's windings. I can't imagine that will continue to work as a long term solution for him, and if I were to guess, he will end up with a bad motor of continued use with it. Not to mention the drastic decrease in working power of the machine.

So again, I would NOT recommending putting a speed control on a universal motor, as you risk permanently destroying it.
The start circuit in an induction motor is normally engaged any time that the motor speed is below about 80% of it's plated speed. The speed of the motor is primarily a function of the supply frequency, with the motor load having a slight second order effect. Increasing or decreasing the voltage applied only affects the current drawn, lower voltage means higher current needed to produce the same power, means more heat produced in motor windings, leading to baking the insulation. That's why a lot of moderate to high power tools come with recommendations about not using them with long (or any) extension cords. The voltage drop in the cord an be underestimated by the lay person, which results in a low supply voltage to the motor, excess current draw through the cable, increased voltage drop in the cable, in an every repeating cycle until a breaker trips, cables fail, or the motor bakes.
03-04-2019 12:27 PM
Potowner1 Not the answer I was hoping for, but THANKS to all anyway.
03-04-2019 11:33 AM
MikeMa First off, I would NOT recommend trying this.....

That said, a guy I knew had a combination mill/metal lathe that had mechanical, but limited, speed control, with an induction motor. He put one of the router speed controls that you can get cheap at Harbor Freight. He makes sure it is set a full speed, turns the machine on, and proceeds to slow the motor with it. I was amazed he did that with out smoking the motor!

So, while it TECHNICALLY worked, he is very likely adding a LOT of extra heat to the motor's windings. I can't imagine that will continue to work as a long term solution for him, and if I were to guess, he will end up with a bad motor of continued use with it. Not to mention the drastic decrease in working power of the machine.

So again, I would NOT recommending putting a speed control on a universal motor, as you risk permanently destroying it.
03-04-2019 11:09 AM
MEBCWD do you have a lathe that you could use?
03-04-2019 08:26 AM
tooler2
Quote:
Originally Posted by mjadams61 View Post
Build you one you can use. here is a motor or find something similiar.

https://www.grainger.com/category/mo...&filters=attrs
Reduced to 20% speed is still 4000 rpm, faster than an induction motor that will be 1800 or 3600 rpm and it is only a 1/4'' shaft.
Rob
03-04-2019 08:14 AM
chessnut2
Quote:
Originally Posted by mjadams61 View Post
Build you one you can use. here is a motor or find something similiar.

https://www.grainger.com/category/mo...&filters=attrs
Thanks for this, Marlin. I've been wondering if something like this was available.
03-03-2019 05:07 PM
mjadams61 Build you one you can use. here is a motor or find something similiar.

https://www.grainger.com/category/mo...&filters=attrs
03-03-2019 03:54 PM
DaninVan Yeh, but I couldn't resist ...that is one pretty piece of equipment, Herb!
You could accomplish the same thing with the line shaft and stepped pulleys off the salvaged motor...like a drill press setup
This thread has more than 10 replies. Click here to review the whole thread.

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

 
For the best viewing experience please update your browser to Google Chrome