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Old 07-31-2018, 11:05 PM
BTromblay BTromblay is offline
ADMINISTRATOR MetalShaper of the Month August 2018
 
Join Date: Oct 2015
Location: Mukwonago, Wi
Posts: 567
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Hi Leif,

On the first reverse curve I had done, I learned a valuable lesson. A critical point of a reverse is the no blow or what I call the neutral zone. The neutral zone is the low spot thru the curve, if you ran a pencil on the surface, it would follow the low spot.

You only stretch on either side of the neutral zone and the reverse will form quickly. When you wheel thru the whole panel, you will loose everything you try to gain with the reverse. If you over form the reverse, you can take shape out by stretching in the neutral.

Hope that makes sense, my shop got brighter when the light bulb went off for me with my project.

Bill
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Bill Tromblay

"A sign of a good machinist, is one who can fix his F$@& Ups" My mentor and friend, Gil Zietz Micro Metric Machine.
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