Home Model Engine Machinist > Building Them > Questions and Answers > hooking up a clausing 5914 lathe
Reply
 
Thread Tools Display Modes
Old 08-12-2011, 01:24 PM   #1
jonesie
 
Join Date: Aug 2009
Posts: 274
Liked 11 Times on 11 Posts

Default hooking up a clausing 5914 lathe

well i just bought a clausing 5914 lathe for a song.it came out of the plant where i work, but did not get to see it run,it got unhooked before i got a chance to start it up. it is in like new condition, but do not know about the variable speed drive. i would like to get it up and running but not sure about the best way to convert 1phase to 3 phase,vfd or rotary. will a vfd work ok with the variable hyd. speed, or do i need to use a rotary converter, or just remove the variable hyd. drive to a pulley set-up. thanks for any help. jonesie



__________________
jonesie is offline  
 
Reply With Quote Quick reply to this message
Old 08-12-2011, 03:28 PM   #2
MachineTom
Senior Member
HMEM_SUPPORTER.png
 
MachineTom's Avatar
 
Join Date: Oct 2010
Location: Jersery Shore, USA
Posts: 708
Liked 91 Times on 66 Posts
Likes Given: 5

Default Re: hooking up a clausing 5914 lathe

For a lathe application, stick with the Clausing variable system. A Lathe needs lots of torque for big turning, tapping etc. You will not get that with a VFD alone. I have a RPC to convert to 3 phase, works fine, I installed it in the garage but the noise finds its way into the workshop anyway. A VFD is almost silent, uses no power at idle, and is cheaper to purchase, and use.

To use a VFD from single to 3 phase, you need to purchase a unit double the size of the largest motor it will run. IE: 1 hp motor needs 2hp VFD, the controls of the lathe On/Off FWD/Rev need to be controlled by the VFD, not the motor controls on the lathe. A 5914 is a vary belt drive not HYD as far as I know. This is fairly simple to do for anyone familiar with electrical wiring, all controls would be low volatage through the VFD.

I had a VFD on a SB 16 Lathe, it was necessary to shift the belts for enough torque for the large D parts, and running taps and dies. The 1944 vintage motor did not blow up at 50% overspeed, but I was uncomfortable with pushing it higher. Slow motor speeds are what invertor duty motors were designed for, as it causes great heating of the stator windings due to the frequency used in VFDs
about 15K hz, so non invertor rated motors could fail at continued low speed high load conditions.

If this will be your only 3 phase machine, go VFD, if you might ever get a mill or grinder, then a RPC makes sense, of you would need a VFD for each machine.

__________________

My Wheels don't slow me down

MachineTom is offline  
 
Reply With Quote Quick reply to this message
Old 08-14-2011, 02:10 AM   #3
jonesie
 
Join Date: Aug 2009
Posts: 274
Liked 11 Times on 11 Posts

Default Re: hooking up a clausing 5914 lathe

machinetom thank you for the reply i think i will go with the vfd drive., and leave the motor set-up as it is. thanks again jonesie

__________________
jonesie is offline  
 
Reply With Quote Quick reply to this message
Reply


Quick Reply
Message:
Options

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Clausing 8520 - Low range?? terrywerm Questions and Answers 13 07-19-2012 12:02 AM
Clausing 8250 mill? lazylathe Tools 99 04-08-2012 12:37 AM
Can anyone identify this Clausing mill? bjo Buy / Sell / Trade / eBay 10 02-14-2010 08:46 PM
10"Clausing lathe synchronous belt oncenter Questions and Answers 1 10-11-2009 03:40 PM
Hooking up a VFD to my mill kvom The Shop 17 01-05-2009 02:07 PM




- Top - Member List