Segeasy Plate

[Donald Lewis]

I recently purchased a 48 segment Segeasy Plate for use with the Stomper. When I place my segments on the plate I get an oval shaped ring instead of round. I have tried moving the segments around on the plate to see if it had something to do with the S.E.L. of my segments and I found a couple of segments that had a slightly different S.E.L. so I cut replacements for them. That didn't solve the problem with the oval shaped ring. Should I expect to have round rings using this method or is it not possible for a Segeasy plate to be made with tight enough tolerance to get round rings? The bottom of my vessel is a freshly turned solid piece of wood the same size as the O.D. of the first ring is supposed to be. I took some measurements of the diameter of the ring and it is .2 inches out of round.

 

[Donald Lewis]

Attached is an Excel Spreadsheet Showing the actual shape of the outside radius using a single segment moved and measured from the outside diameter in each position on the Segeasy plate. The measurements were taken using a digital caliper. I created a radar chart to graphically show what I was talking about in my previous post. As you can see from the graph the Segeasy plate doesn't produce a round ring.

 

[mfisher]

Thanks for posting the spreadsheet.

imo, the variation in the segment position on the plate could be from slight variation in SEL between segments or slight variation in segment angle.

How close are the SEL of each segment?

 

[Donald Lewis]

Thanks for posting the spreadsheet.

imo, the variation in the segment position on the plate could be from slight variation in SEL between segments or slight variation in segment angle.

How close are the SEL of each segment?

The measurements for the spread sheet were made using the same segment moved from position to position and measuring from the outside of the plate to the outside of the segment. My thinking is that if a single segment doesn't position at the same distance from either the center or the outside edge of the plate then the error is in the plate not the segment. Since I used the same segment to take the measurements the error cannot be with the SEL or the angle. The shape depicted in the spread sheet graph looks like my original shape with different segments in each position. In fact looking at the measurements the problem is over the .2" that I originally stated.

 

[Mike Selser]

A couple of questions. Has the segment you used had all the “fuzzies” removed? Did you orient the segment with the same face up in each slot? Did you make your measurement from the same edge of the segment each time? Did you apply the same pressure when inserting the segment into each slot? What is the calculated radius for the sel of the wedge you used? It would be interesting to see what you would get if you repeated your measurements with a couple of different segments. I was getting ready to order one of these plates until I came across some threads that indicated there might be some accuracy issues with them. Have you addressed this with Jerry Bennett?

 

[mfisher]

The measurements for the spread sheet were made using the same segment moved from position to position and measuring from the outside of the plate to the outside of the segment. My thinking is that if a single segment doesn't position at the same distance from either the center or the outside edge of the plate then the error is in the plate not the segment. Since I used the same segment to take the measurements the error cannot be with the SEL or the angle. The shape depicted in the spread sheet graph looks like my original shape with different segments in each position. In fact looking at the measurements the problem is over the .2" that I originally stated.

Did not realize you used the same segment for all the measurements.
Just out of curiosity, if you took the segment and placed it in the slot, measured, then removed the segment and reinstalled it the same slot, would you get the same measurements?

As another poster suggested, I would reach out to who Bennett or the supplier you bought the plate from for some suggestions or refund.

My experience has been helping someone build an open segment bowl. I was looking at making a closed segment plate using the clubs cnc machine. May hold off for a bit on doing that.

 

[Donald Lewis]

A couple of questions. Has the segment you used had all the “fuzzies” removed? Did you orient the segment with the same face up in each slot? Did you make your measurement from the same edge of the segment each time? Did you apply the same pressure when inserting the segment into each slot? What is the calculated radius for the sel of the wedge you used? It would be interesting to see what you would get if you repeated your measurements with a couple of different segments. I was getting ready to order one of these plates until I came across some threads that indicated there might be some accuracy issues with them. Have you addressed this with Jerry Bennett?

The segment has no fuzzies. The segment was oriented the same for each measurement. I took my measurement with the rod on the caliper placed against the edge of the left side of the wedge slot. I placed the wedge loosely in the slot and extended rod of the caliper. I then used the pressure that was needed to push the rod back into the caliper to seat the segment as I pushed the caliper up against the outside edge of the Segeasy Plate. I also tried to push the segment in on the position that extended out the farthest. There was no way I could push it in any where close to what the segment was in on the position that was in the farthest. I have not contacted Jerry Bennett. I purchased the Segeasy Plate from Wood Turner Pro. The diameter of the ring should be 6.3" or a radius of 3.15" according to my plan from Segment Pro.

 

[Donald Lewis]

Did not realize you used the same segment for all the measurements.
Just out of curiosity, if you took the segment and placed it in the slot, measured, then removed the segment and reinstalled it the same slot, would you get the same measurements?

As another poster suggested, I would reach out to who Bennett or the supplier you bought the plate from for some suggestions or refund.

My experience has been helping someone build an open segment bowl. I was looking at making a closed segment plate using the clubs cnc machine. May hold off for a bit on doing that.

I did take a measurement then remove the wedge and then put it back in the slot. I did get the same measurement. Just for reference I am a retired Industrial Instrument Technician. I spent years measuring things and setting up Instrument calibrations. I was very careful taking the measurements and duplicating the process for each measurement.

 

[mfisher]

I did take a measurement then remove the wedge and then put it back in the slot. I did get the same measurement. Just for reference I am a retired Industrial Instrument Technician. I spent years measuring things and setting up Instrument calibrations. I was very careful taking the measurements and duplicating the process for each measurement.

You may have a defective plate.

sorry can't be much help. I have not used a closed segment plate. The open segment plate seems to work ok.

 

[Donald Lewis]

You may have a defective plate.

sorry can't be much help. I have not used a closed segment plate. The open segment plate seems to work ok.

This is an open segment plate. The tolerance of this plate is so bad that it is basically unusable. If you can supply one with better tolerance I would like to exchange the plate. If not I would like to return it for a refund.

 

[mfisher]

.

This is an open segment plate. The tolerance of this plate is so bad that it is basically unusable. If you can supply one with better tolerance I would like to exchange the plate. If not I would like to return it for a refund.

I am just one of the moderators to this forum and have nothing to do with sales.
Contact Lloyd for problems with sales through the Stores web page.

 

[jerry bennett]

Hi Guys,
There is a variance due to the small angles and tolerances of the cnc. My 48-2 plate variation is .116". My 48-0 is.069". My 36-3 is .033". Others may be a little different. I assume you are adding a little padding to your wall thickness.

 

[Donald Lewis]

Hi Guys,
There is a variance due to the small angles and tolerances of the cnc. My 48-2 plate variation is .116". My 48-0 is.069". My 36-3 is .033". Others may be a little different. I assume you are adding a little padding to your wall thickness.

The measurements I made on the 48-2 plate that I bought are shown in the excel sheet that I posted in this thread. The variation that I measured is close to what Jerry posted as a measurement of the radius of the ring. It is worth noting that the largest errors are across the diameter from each other so the error in the diameter is .232 Inches which give you a somewhat oval shaped ring. My intent when I bought this plate was to use it with the stomper. Since there is some flex in the spring loaded shaft of the stomper this plate variation adds to the difficulty of getting good alignment of the open segment rings. For me I will stick to gluing one segment at a time on a glue jig until someone comes up with a more accurately machined segmenting plate.