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I’m trying to cut some large crown molding on the flat on a sliding cmpd mitre saw. Can anyone tell me the proper angles to use for a hypothetical 90 degree outside corner. 45 degree angle and 45 degree pitch doesn’t ‘cut it’. This is the standard Home Depot pattern in 5 1/2″ width. Thanks Jim
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Replies
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I don't think the home depot crown can be mitered.
*I'm too cheap to buy a new saw so I still do it the old way, upside down and backwards, but, somebody who uses the slider all the time can tell you the proper degree setting for your crown, or you can look it up in the manual that came with your saw or maybe your saw has those special degrees marked right on the bezels. Ralph
*Hello Lumber Jim, I do not cut crown molding on the flat, but I looked up the info in a Delta info book.If cutting 52/38 degree crown, then the miter setting is 31.62 degrees, and the bevel setting is 33.86 degrees.If cutting 45/45 degree crown, then 35.26 degrees for miter, and 30.00 degrees for bevel.These should already be marked on your saw's scale (mine are in red)If you are not sure if the crown molding you have is 52/38 bevel, or 45/45 bevel, send me an e-mail and I'll help you out. Asking here could get a lot of negative responses.James DuHamel
*Yep, it depends on the "spring" angle.Check http://www.deltawoodworking.com/ for useful tables.Funny, I think I'm the only one here who uses these tables AND has a Delta CM!
*I still like to bed my crown on my chop saw. Some of the sliders have too small a fence. You can usually add a piece rto help this.Rick Tuk
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Thank you for the quick response. The Delta homepage is just what I was looking for! The hitachi slide mitre saw scales are less than useful! I wish they would revise them so that they were less cryptic. A standard degree scale with a second line of standard detants would be a lot easier to use on complex cuts like these. Thanks to all for your responses. Jim
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I took the formula from the fine homebuilding trim book and put it into excell so all I have to do is enter the spring and corner angle and my spreadsheet gives me the swing and miter setting. I usually know a day or two before what angles I'll be running and I always punch in about a 5 degree spread to adjust for out of square. This saves alot of trial and error.
*Smart. What, no laptop or palmpilot on the job???
*Jim, all hi-tech aside, cut a piece the old way standing it up on the saw fence. Then lay it down on the table and adjust the saws bevel and angle settings to the piece. I do this with all new crowns I encounter. It eliminates the need for others "settings" Steve
*I do it like Steve does.. I have found that crown can vary a couple of degrees.. I cope inside corners & mitre outside corners.. L. Siders
*Did anybody ever ask a questions at http://www.google.com?? Try it you will like it.. L. Siders
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I'm trying to cut some large crown molding on the flat on a sliding cmpd mitre saw. Can anyone tell me the proper angles to use for a hypothetical 90 degree outside corner. 45 degree angle and 45 degree pitch doesn't 'cut it'. This is the standard Home Depot pattern in 5 1/2" width. Thanks Jim