Rounding Gadget Diameter Allowance

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Rounding Gadget Diameter Allowance

Postby SteveNelson46 » Sat Feb 23, 2019 3:13 pm

I think I'm a little confused with the rounding gadget. I'm using a 3.5" square blank and the project is set up as a 3" diameter by 12" length with Z-zero set to cylinder axis. With "Optimized Raster" selected, any positive value placed in the allowance (amount of material to leave on cylinder) box has no effect unless the combined values of the project diameter (in this case 3") plus the amount to be left on exceeds the size of the blank. Then an error message is generated. If a negative number is used, the thickness of the material is reduced by that amount. The values are checked by turning the auto wrap off and reading the mouse coordinates at the bottom of the screen. The object was to leave a thin skin of .02" so the finished diameter is 3.02". I know that I can probably just setup a new project with that diameter but one would assume the rounding gadget setup would allow for it.
Steve
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Re: Rounding Gadget Diameter Allowance

Postby Rcnewcomb » Mon Feb 25, 2019 2:11 am

Here is what I see:
Create a rotary job
RoundingGadget01.jpg


Use the rounding gadget for a 3.5 square blanks and leave 0.02 extra material
RoundingGadget02.png


The toolpath shows a max depth of MINUS 0.02 which means it is 0.02 ABOVE the surface of the 3" diameter blank.
RoundingGadget03.png


We can verify this by looking at the G code generated. The Z depth should be half the diameter (3"/2=1.5") PLUS the 0.02" extra material = 1.52

Code: Select all
 G1 A-352.340426 Y12.000000 Z1.520000
 G1 A-360.000001 Y12.000000 Z1.520000
 G1 A-360.000001 Y0.000000 Z1.520000
 G0 A-360.000001 Y0.000000 Z2.974874
 G53 Z0
 M5
 G53 P9
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Re: Rounding Gadget Diameter Allowance

Postby SteveNelson46 » Mon Feb 25, 2019 4:07 pm

Randall,

Reviewing the g-code does verify the final depth but, I was checking the depth by running the toolpath, unwrapping the view on the screen, and using the mouse coordinates at the bottom right.
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Re: Rounding Gadget Diameter Allowance

Postby Rcnewcomb » Mon Feb 25, 2019 5:06 pm

I was checking the depth by running the toolpath, unwrapping the view on the screen, and using the mouse coordinates at the bottom right.

It makes sense to me that the flat view shows 1.5, because that is the material definition that was set up for the rotary job. The preview works on the material removed from the job. In this particular case no material was removed from the 3" diameter cylinder.
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