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21
How do I?? / Re: Reversing D.C. Motor Direction
« Last post by raynerd on July 18, 2018, 02:08:33 AM »
That John, is because I’m talking out of my .....
It is not a D.C. motor at all...it is most definately running on AC!

However, you have answered my question. Thank you very much!
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How do I?? / Re: Reversing D.C. Motor Direction
« Last post by John Rudd on July 18, 2018, 01:14:21 AM »
I dont comoletely understand what you have there, given your description.....

A dc motor has magnets, no wound field coils....it will run on a dc supply only

A universal motor doesnt have magnets, but wound field coils....will run on either ac or dc supply

Any how, in either case, swapping over the wires to the brushes will change the direction of rotation....

Do be careful..... :zap:
23
Project Logs / Re: DIY tablet computer, maybe.
« Last post by S. Heslop on July 17, 2018, 10:46:19 PM »
Quote from: vtsteam on July 17, 2018, 10:06:32 PM
Now that's my kind of clutter!  :dremel:

I swear I just cleared the desk a week ago. I can't figure out where it comes from but its the same stuff every time.
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Project Logs / Re: DIY tablet computer, maybe.
« Last post by vtsteam on July 17, 2018, 10:06:32 PM »
Now that's my kind of clutter!  :dremel:
25
Project Logs / Re: Building a New Lathe
« Last post by vtsteam on July 17, 2018, 07:48:12 PM »
We got about 2 hours work on the bridge today before thunderstorms hit. They put down a couple inches of rain (badly needed) for the next 4 hours, and a flash flood hit the stream the bridge abutments are being built on. The water was over the coffer dams and about 3 feet up the new abutment. No damage or problems, but it sure did stop work.

I did get the the T-bars cleaned up some, shortened to length, and drilled them to take fastening to the cross slide. I was gratified to see all of the holes matched the slide's tapped holes perfectly -- not always an achievement for me. But they were all done on the mill, and my dial twiddling worked out.

Nothing much worth showing yet, They need to be countersunk, fastened, and then the whole surface milled together. But a little progress anyway.
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How do I?? / Reversing D.C. Motor Direction
« Last post by raynerd on July 17, 2018, 05:40:05 PM »
Evening, I’ve got a D.C. electric motor. It’s old, probably 30 years. I’m not totally familiar with motors but after some research, and a picture below, I’ll try and explain what I have inside. So when the rotor is out, I’ve got the magnets and what looks like a wound stator (googling has suggested that!) that is wrapped. These are two semi circles and a wire coming out of each. Two wires going to each of the brushes and one going to live and one to common.

I appreciate that I clearly haven’t a clue what I am talking about I should be capable of editing the configuration if I know what I have to do. In an ideal world, I’d add a switch to flip the rotation but I’m already getting ahead of myself.

Is there any way to change the direction of rotation?



Cheers
Chris
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Project Logs / Re: Building a New Lathe
« Last post by Homebrewer on July 17, 2018, 05:28:53 PM »
I've got both you beat, fellows.  It's 106°F here in Texas with no rain or cool fronts in sight. 

It's times like this that I feel blessed to have an indoor job!

Sent from my SM-G950U using Tapatalk

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Project Logs / Re: Building a New Lathe
« Last post by Neubert1975 on July 17, 2018, 04:54:58 PM »
no need to be sorry.
we have brutal heat here too, and today i have spend all day out in it, fixing my moms car, damn it was hot.
we sure could use some rain too, everything outsite is drying out.

 :beer:
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Project Logs / Re: my way to billd a stuart 10 horizontal engine
« Last post by krv3000 on July 17, 2018, 04:37:11 PM »
hi Norman theirs this type  on eBay this is the number  162449306200
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Project Logs / Re: my way to billd a stuart 10 horizontal engine
« Last post by Fergus OMore on July 17, 2018, 04:22:08 PM »
Thanks Bob.

I was hoping to find the name of an epoxy which could be the medium to mix a substantial amount of bronze filings.

Actually they were stuff used by gilders and - to my knowledge- were at least in the family in 1938.Shame not to have some use for it.

Actually you saw some of it when you Kindly helped to assist me with a 'newer' lathe.

My formal thanks you and Peter!

Norm
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