kkoerber
off to a rocking start
Member since June 2016
Posts: 18
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Post by kkoerber on Aug 21, 2016 20:09:38 GMT -5
Hello, I've taken some pictures of my little cabbing setup and was wondering if by looking at them, anybody here can give me some advice as to why my unit is running loud. I just bought another used machine very similar to this one but a bit older yesterday and it is much quieter than this one. Any advice would be greatly appreciated, thanks for your time! Pics ---------> Cabber Pics
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Post by jakesrocks on Aug 21, 2016 20:37:56 GMT -5
#1, is your belt too tight ? You should be able to press down on the belt half way between pulleys & get it to move 1/2" - 5/8" down. Too tight of a belt can cause noise, and will wear out bearings.
#2, Take the belt off. Using a screwdriver with the handle pressed against your ear and the blade against a bearing, spin the arbor and listen. Do this on both bearings. If 1 or both bearings make a rough grinding noise, there's your problem. The screwdriver acts like a doctors stethoscope.
If only one bearing is making noise, replace both bearings while you have the machine apart, cause the other bearing probably is on its way out too.
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kkoerber
off to a rocking start
Member since June 2016
Posts: 18
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Post by kkoerber on Aug 21, 2016 20:40:13 GMT -5
There's a link to a vid of it running, and the new one I got showing the difference in noise. And thanks for that tip about the bearings, that very well could be my problem.
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gazingm42
starting to shine!
Member since July 2014
Posts: 45
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Post by gazingm42 on Aug 22, 2016 0:00:08 GMT -5
To me sounds like you have some noise coming from the motor to plywood connection. I would check the bolts on the motor connection to the board.
The other test I would do is remove the belt from the motor and turn the motor on to see if you have the same level/type of noise. This will rule out a bearing issue in the lap.
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Fossilman
Cave Dweller
Member since January 2009
Posts: 20,690
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Post by Fossilman on Aug 22, 2016 10:42:03 GMT -5
I also say plywood noise....If not bolted or screwed down properly it will vibrate.....(heck of a noise).. Hope you find the problem...
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Post by johnjsgems on Aug 22, 2016 13:58:57 GMT -5
I have replaced noisy bearings on the same old Lortone arbors only to have it sound exactly the same. I suspect the light weight tin cover acts like a megaphone to amplify noise. With belt off check for any up/down or back/forth play. Or any roughness when spinning by hand. If nothing felt I would use it as is. You can help deaden sound on most equipment by placing base board on scrap of carpet or rubber mat.
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ziggy
spending too much on rocks
Member since June 2016
Posts: 483
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Post by ziggy on Aug 30, 2016 19:54:13 GMT -5
I have replaced noisy bearings on the same old Lortone arbors only to have it sound exactly the same. I suspect the light weight tin cover acts like a megaphone to amplify noise. With belt off check for any up/down or back/forth play. Or any roughness when spinning by hand. If nothing felt I would use it as is. You can help deaden sound on most equipment by placing base board on scrap of carpet or rubber mat. I agree with johnjsgems on the cover amplifying the noise. Also, when you move the cam toward the noisy motor it gets louder. I noticed that the loud motor has an open face which will naturally be louder and looks like a larger HP than the small one which lacks the open face. Take off the belt to see if it is just a loud motor to rule out bad arbor bearings. It could be brush noise or a worn out motor bearing also. The noisy motor has an external starter and the smaller one is either self starting or has a built in internal starter,so comparing the noise from these two very different motors might be like comparing apples and oranges.They are both similar shape but of different flavors. The one that looks like a Baldor (the open one) has the metal mounting foot attached directly to the motor case and can transfer noise readily to whatever its mounted on. The smaller motor has rubber mounts that buffer the motor case from the actual motor mount, preventing excessive transfer of mechanical noise. I also have a motor with the rubber buffers between case and mount like yours, and like yours, it is much quieter than my other motors.
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