Rotary with barley Twist

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Rotary with barley Twist

Postby Rcnewcomb » Sun May 12, 2019 1:31 am

Everything was cut in under 15 minutes including the rounding of the 4"x4". Most were done in about 12 minutes. The pieces are 13"-14" long and cut from Home Depot redwood 4"x4"s. The bit was a Magnate 7551 1" Barley Twist with a 0.5" cutting length.
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Re: Rotary with barley Twist

Postby Rcnewcomb » Sun May 12, 2019 1:37 am

A few earlier shots of the first cuts with the Magnate 7551 1" Barley Twist bit. Very nice finish straight off the machine.
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Re: Rotary with barley Twist

Postby Rcnewcomb » Sun May 12, 2019 1:51 am

Here is a 40 second video of rounding the 4x4 with a 1/2" end mill. ->YouTube Video
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Re: Rotary with barley Twist

Postby SteveNelson46 » Sun May 12, 2019 2:00 am

Nice job Randall. I was trying to make the round over part of the cut meet exactly half way so it formed a symmetrical dome. It can be done but the depth of cut, z-zero, and the diameter of the blank have to be set exactly. If any of the settings are off by even a couple of thousandths of an inch the round-overs will have a ridge or flat spot. Vectric tech support help me work it out.
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Re: Rotary with barley Twist

Postby mtylerfl » Sun May 12, 2019 2:21 am

SteveNelson46 wrote:Nice job Randall. I was trying to make the round over part of the cut meet exactly half way so it formed a symmetrical dome. It can be done but the depth of cut, z-zero, and the diameter of the blank have to be set exactly. If any of the settings are off by even a couple of thousandths of an inch the round-overs will have a ridge or flat spot. Vectric tech support help me work it out.


Hmmm. Glad they helped you sort that, Steve, but I could have sworn you mentioned in your original post/thread you had already confirmed your z-zero settings for accuracy, adjusted cut depth, had accurate diameter, vector spacing, etc.

Was there anything Tech Support said other than what you (and us) had not already thought of?
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Re: Rotary with barley Twist

Postby mtylerfl » Sun May 12, 2019 2:24 am

Randall! All those rotary examples look fantastic! Are you bringing some to Denver?
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Re: Rotary with barley Twist

Postby Rcnewcomb » Sun May 12, 2019 2:33 am

Are you bringing some to Denver?

That is what I am hoping for.
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Re: Rotary with barley Twist

Postby sawmiller » Sun May 26, 2019 12:21 pm

on the roundover video i like how its doing the rounding in one pass, did you change the depth of pass ?
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Re: Rotary with barley Twist

Postby Rcnewcomb » Sun May 26, 2019 8:41 pm

On the roundover I use 0.5 pass depth with the 1/2” bit because I use a 20% step over. So it is mostly side cutting a narrow strip.
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