lathe placement

JT.

JT.

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when i got my lathe home it was sitting on 2 wood pieces ther e where no vibrations ore noise when running it on max speed ore low speed
now i got it installed in place ,made some SS feet with M 16 bolts for it .( in the instructions they say to poor a concrete slapp under the feet so it sits on it but i wonder how i can do some line out from the bed after )
i got it lined out no problem there but now i got some vibrations and way more noise when it runs
floor is concrete . i can now make the lathe vibrate also when banging it nect to the lettre C (celtic 14 sign )
it is a 2400 lbs lathe .
i think the feet are not enuff supporting .like you can see the bolt is not sitting on the corners but more to the middle
and there is snearly as mutch weight on either side so the rear (RH) is not supported a lot i can lift it by hand so i think it has a max of 200 lbs on it )

so to get ride of the vibrations i got a few opptions
1= concrete support slab (not realy my favorit solution but ....)
2=wood log the heavy corner (little like a concrete slab and do the line out (twist) only from the right leg 3=listen to some suggestions from you guys

voet (2).jpg

voet.jpg

voet (2).jpg voet.jpg
 
When the lathe was on the wood pieces they acted as vibration dampeners. When you put the SS feet on the lathe you took the dampening effect away. If you are going to use feet you will need to isolate the feet from the floor. Look up vibration dampening and you will find what you need to do.

"Billy G"
 
Why not trying hockey pucks. Im just wondering as why a 2400lb lathe viabrates??? I got one could be
a little more weight and 30yrs ago we just plunked it on the floor and you can put a wine glass on it
and doesnt even make a ripple. somthings got ta be out of balance Just wondering
 
All good advice so far. A couple things need to be addressed. First is to address the sources of vibration as much as possible. Out of balance chucks are the major culprit followed by any large sheaves or gears that spin rapidly. Do your best to statically balance all the large components. Other vibrations can come from drive belts. Worn belts need to be replaced and idlers need to be properly adjusted to take out slack.

Once the major sources of vibration are under control, it's time to align the lathe (which does not necessarily mean leveling it horizontally and vertically) and adjust the legs/feet so the weight is distributed evenly as possible. Of course the head end is heavier but the two feet under the head end must be sharing the load evenly; likewise with the tail end. Assuming it's aligned properly and weight balanced OK, the last step in addressing vibration is to use neoprene leveling pads. You can buy them for $30 (USC) each or, just obtain a sheet of 1/4" dense neoprene to put under your existing metal feet. eBay is a good source for those leveling feet as well as vibration pads.

Good luck...

Ray
 
here are some video with a glas of water on the lathe
i placed a peace of of brass unther one corner to support the corner more
seems to help first video is one where i tap the lathe so yuo can see the water move
the second one the lathe runs at full speed 1000 rpm
once it is on full speed there is hardly any vibration but it picks up when deceleration so probably the motor ore belts are
cosing the vibrations

i stil do not like that the all of the lathe sits on 4 16 mm studs

[video=youtube;8kM4ByomEzQ]http://www.youtube.com/watch?v=8kM4ByomEzQ&list=UU00O87vzt7abYMCTIsyRpyA& index=1[/video]

[video=youtube;6h6S1kMSedo]http://www.youtube.com/watch?v=6h6S1kMSedo&list=UU00O87vzt7abYMCTIsyRpyA[/video]
 
Looking at that pic, it appears you have one in the front, and assuming one at the rear , on the headstock end anyway.
You say you didn't have vibes before you installed the feet, but as Bill said, wood will act as a vibration damper as well. If I was mounting leveling feet, I would put them as close to the corners as possible, and use 4 at the headstock, and the same at the tailstock end as well. You want to spread out the weight better. The more of the adjustment feet the better this will be.

I had a Asian 12x37 yrs ago that was set up from the factory with only 2 feet at each end, it shook bad enough that I rigged up 4 at each end, and it was smooth as could be. The main thing is getting your machine level, and getting the load evened out as well. Wood spreads the load out, but not much good for getting it level. Though in yrs past, the old timers used to use wood to park the machines on, and level with wooden shims. Just get the loads spread out, the vibes will go away, then concentrait on leveling the machine.
 
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Thaaat'a what I need! Cup holders on my lathe! I've been in the shop 10 hrs/day since I left the office Friday afternoon...

Ray
 
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