Coordinate system vs compound angled planes
Coordinate system vs compound angled planes
(OP)
Did a search but did not find what I am looking for. In a solid, I would like to create a cutout (say round hole) at a compound angle...say 10deg from xy and 10deg from xz. I created a sketch line in xy..then attached a coordinate to it's endpoint. Then edited the angles of the coordinate system...10deg, 10deg. I made a simple round cutout with it's centerpoint attached to the origin....now...if I measure the angle of the cutout in draft from the top and side view I get 10.000deg from the top and 10.151deg from the side..???
I then tested the same problem using two angled planes. I noticed the same problem, however, the order in which the two angled planes are created determines in which view I will measure 10.151deg....
I also created these cutouts starting at the same origin and extended them in opposite directions to make sure of what I was measuring the top and side views....the two cutouts were not co-linear...
any ideas??
Regards,
dtctx
I then tested the same problem using two angled planes. I noticed the same problem, however, the order in which the two angled planes are created determines in which view I will measure 10.151deg....
I also created these cutouts starting at the same origin and extended them in opposite directions to make sure of what I was measuring the top and side views....the two cutouts were not co-linear...
any ideas??
Regards,
dtctx





RE: Coordinate system vs compound angled planes
hmm, you are measuring one angle between two lines that do
not coincide therefore the angle will be .15 larger and
.15 smaller.
Put a coordinate system in an empty file just on the 0,0,0
point and specify the angle for x and y to be 10 degrees
Now look at the top (x/y plane) Note the deviation of
the Z-axis and the X-Axis of your coordinate system.
This is due to the fact that either rotation turns an already
'slanted' coordinate sytem about an additional axis. All
axis/planes, however must be perpendicular to each other
Hope I got the explanation the correct way. I have no ideas
how to measure the correct angle -- your cutout, however,
is OK.
dy
RE: Coordinate system vs compound angled planes
Start with a plane that is angled by 10 degrees.
Draw a sketch on that plane of a single line that is at a 10 degree angle relative to your other "global" datum.
Create a plane normal to that sketch line and create the hole on that plane.
--Scott
http://wertel.eng.pro
RE: Coordinate system vs compound angled planes
or try this:
using function 'plane by 3 points'. Sample
- on the x/z plane sketch a line of arbitray length
from 0,0 at an angle of 10
- repeat the above but now on the xz plane
- function plane by 3 points
- endpoint of one line (where both lines 'meet')
- opposite endpoint of that line
- far endpont of second line
Now you have a plane to draw on an your cutout will measure
an angle of 10 regardless from which side you view it
dy
RE: Coordinate system vs compound angled planes
Thanks again,
dtctx