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In X3
Is there a way to move dimensions after they are
set - I seem to remember that they could be
dragged in previous versions - also can a note
be edited
Thanks for help
The history tree can be used to modify some
aspects of a model after it is created
fillet sizes - length of extrudes - chamfers
- draft angles for example
Analyzing the 2 profiles they are not the same
the tops are unequal arcs - a sweep surface
using the 2 along profiles and one along gives a
surface that analyzes as good - the distance
between the 2 along splines is not constant
all the way around
create a face toolpath in the front plane
then rotate the toolpath about the top plane
in as many angles as wanted - maybe start
with 16 sides - then go to 32 sides etc
until it is as close to round as wanted
If you go to tool settings there is a box to
adjust feed on arc move - I think it scales
the feed rate based on how close the arc radius
is to the tool radius
The tool will stay stationary and the part
will rotate under it to give the desired groove
- assuming the groove is the same depth all around and there is no cuvature in the x axis direction
Lay the part out flat in the top view - the length of the part around the outside is determined by the included angle that the groove
makes from the dia to the center - then move the geometry up in the z axis by ((17.012) - (3.078)) then do a contour toolpath with Y axis substituted using the 6.156 dia of rotation
I can e-mail you a sample if this is confusing
I think the 4th axis rotation with 2d contour
will work - lay out the geometry flat and do
a y axis subsitution - the y axis length will be
equal to the included angle of the 17.01 radius-
in the top c-plane draw a line eqaual in length to the circumference of the 3.078 dia - a contour toolpath from end to end on this line will go once around the 3.078 dia starting at 0 and ending at 360 - to place the geometry at any
angle move it along the line - end point is 0 middle is 180 etc -draw your groove so that the
length falls at the included angle of the 17.01 dia then translate the groove geo z+ ((17.01/2) - (3.078/2)) then write a contour toolpath and do a y axis substitution uaning 30.078 dia
I can e-mail you an example if you like
If the lines are connected and will chain
write a contour toolpath with cutter comp off
and a toolpath filter - then backplot and save the backplot as geometry - this should smooth out your gemetry and give tangent lines and arcs - if the geometry wont chain try setting the chaining tolerance to a bigger value
I think this fplot will do what you want
step_var1 = t
step_size1 = 10
lower_limit1 = 0
upper_limit1 = 90
geometry = nurbs
origin = 0,0,0
x =(2-(.01*t))*cos(t)
y =(2-(.01*t))*sin(t)
for your application change the 2 to your radius
change the step size to 1
change the .01 to the amount each line shortens
make sure to check that the variables in the
fplot dialog box are set to match those in your equation
this example above assumes going from 0 to 90 degreesin 10 degree increments
with each line shortening by .01
it will plot a nurbs curve
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