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Post by jfc on Dec 23, 2007 17:01:02 GMT
I ordered a 55mm cutter block and a set of cutters and limiters to do a 40mm x15mm rebate and a 15mm x15mm chamfer . the block is 100mm x 30mm bore and i have it on tophats to fit my 1" spindle and its an alley block . When i start it up it seems to speed up about 6 times untill it get to a very un nerving loud speed . My 50mm x 100mm steel block with rebate cutters that are thicker metal doesnt get this loud . So i'm wondering if there is something wrong  I havnt put any timber through yet as it really is a concern that it's just not right . |
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Post by nickw on Dec 23, 2007 17:34:11 GMT
Are you sure that the top hat is actually gripping the block properly?
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Post by dom on Dec 23, 2007 17:35:35 GMT
I have a long stick you can use for switching on and off ;D
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Post by jfc on Dec 23, 2007 17:45:25 GMT
Thats ok thanks Dom i have my own ;D come to think of it the top hat didnt fit as snug as it does on my other 30mm blocks . I wonder if they have sent me a 1 1/4" block by mistake |
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Post by jasonb on Dec 23, 2007 19:20:00 GMT
Are the ends of the fence closer to the cutters, the air noise can increase as the clearance is reduced.
Jason
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Post by jfc on Dec 23, 2007 19:29:56 GMT
About 6mm away , there is no chance of me making a zero clearance false fence with this one !!!!!  |
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Post by 9fingers on Dec 23, 2007 20:51:27 GMT
Thats ok thanks Dom i have my own ;D come to think of it the top hat didnt fit as snug as it does on my other 30mm blocks . I wonder if they have sent me a 1 1/4" block by mistake There is 1.75 mm between 30mm and 1.25". That would be a rattling good fit. I think you'd notice that. The speed variation is worrying. Maybe the belts are slipping or perhaps the tophats are not gripping in the right surfaces. Try marking the shaft, tophat and block with a pencil line and see it they move out of line when you run the machine. Bob |
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Post by jfc on Dec 24, 2007 11:44:03 GMT
Ive redone every thing and marked the top hat and block and they didnt move . Maybe its just me being a girl  but it just doesnt sound right . |
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Post by 9fingers on Dec 24, 2007 12:59:33 GMT
Could be just wind !! Pull the fence back out of the way and see if the noise is different. Could just be more air being shifted by the cutters than you are used to with other blocks.
Take care - Spindle moulders have the greatest 'pucker factor' of any machines I use.
Bob
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Post by jfc on Dec 24, 2007 13:03:21 GMT
You could be right , i have started on the brussel sprouts already ;D
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Post by oldjoiner on Dec 24, 2007 16:44:17 GMT
Check that the top hats are not bottoming before they pinch the block. This will allow the block, and or shaft, to rotate independently, so that when the machine starts, the block is driven by the loose fit on the top hats, and the friction on the lower flange created by it's own weight. this would account for the symtems you descibe.
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Post by jfc on Dec 24, 2007 16:51:05 GMT
They cant be doing that as they are the same ones i use on 40mm blocks . I'll put another block in and see if that sounds normal .
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Post by engineerone on Dec 24, 2007 17:18:31 GMT
jason spindle moulder, normal, doesn't compute ;D have you checked that both the new tooling and the shaft do not have any burrs or marks on them, doesn't take much to unbalance those things i would think. just be careful not to use the moulder just after eating the sprouts, other wise something will catch fire ;D paul  |
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Post by oldjoiner on Dec 24, 2007 18:32:28 GMT
The other possibility is cold bearings, or rather the lubricant. With the weather we've been having recently, it may be the case. Had this many years ago with a surface planer, (grease lub), and still do on a spindle (oil lub). Bearings grumble, whine, and generally whinge until they warm up. Doesn't usually take long at 6000rpm & 5kw. Try without tooling on a cold morning to see if it persists.
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I havnt put any timber through yet as it really is a concern that it's just not right .
but it just doesnt sound right .
