RE: triple hollow spiral

[M.W.Foscue]

Bill,

Thanks.  Could you have moved the saddle 3" after cutting the first path (instead of the 1 1/2"?)? 

That would have given you "cut #3" - then come back and do numbers 2 and 4 after that?  

Seems like you could cut them in any "order" - so was just curious.

Your filming is great - hard to believe you do all that all by yourself.  We REALLY appreciate it!

Have a great evening.   Probably starting to cool down quite a bit "down there" isn't it? 

Means more time in the shop for you!!

Cheers!

Mac

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-----Original Message-----
From: bulke...@mmnet.com.au
Sent: Mar 23, 2021 5:03 PM
To: legacy-ornamental-mills@googlegroups.com
Subject: RE: triple hollow spiral

Mac its all got to do with math you multiply the number of starts by the width of the cutter in this case 4 times 1 ½  which is 6 so that is the 6inch pitch so to get the next start you disconnect the leadscrew and move the saddle along 1½ inches the cutter width and reingauge the leadscrew that automatically puts the cutter one quarter turn round the circumference . removing the unwanted spirals was done pretty much the same as in the first video just drill holes in them and break them off in pieces all done very carefully its delicate work .

 

The spiral has to be an up cut to get rid of the waste a down would build up the sawdust and possibly cause a tool brake and or worse a spiral break the wood was really a lousy piece I should have scraped it and started again it’s just that I was a long way into it and didn’t want to do all that work over again. The music I used a different tune each time I edited the filming the same tune gets a bit boring after listening to it for a while.

 

Bill

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From: legacy-ornamental-mills@googlegroups.com <legacy-ornamental-mills@googlegroups.com> On Behalf Of M.W.Foscue
Sent: Wednesday, 24 March 2021 2:18 AM
To: legacy-ornamental-mills@googlegroups.com
Subject: Re: triple hollow spiral

 

Bill,

Really nice video - EXCELLENT job!

Thanks for sharing.

A couple questions:

 

1.  When doing the 2nd "start" - did you go 25% (90º) around the circumference? 

     Or did you go 180º and begin the 2nd" start?

     Is there a good reson for doing it one way vs the other - or does it not matter?

 

2.  Pls explain how you removed the unwanted spirals?  I imagine it was simply a "destructive" method.

 

3.  The straight spiral cutter - was it an "up cut" version?  Would a down cut ave given you a bit less tear-out risk?

 

Thanks again.  (PS - liked the "music" vs listening to either the router or nothing.)

Mac

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-----Original Message-----
From: bulke...@mmnet.com.au
Sent: Mar 23, 2021 9:47 AM
To: legacy-ornamental-mills@googlegroups.com
Subject: triple hollow spiral

I just finished part 2 of the triple spiral https://youtu.be/Mxx1bhktUkI

 

A very difficult spiral to make lots of patience needed here so flimsy very light cuts and lots of prevention against vibration. I had filming problems too I lost one part of the filming the removal of the 2 unwanted spirals but there is enough left to sill see how to do it. This is definitely not for beginners of the legacy mill

 

Bill

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