Base alignment

[[Lo...]]

Hello everyone,
I have a problem and a question and a headache. HAHA!!! So the part I have attached has an issue with a base alignment. I use the cylinder in the center for x-y origin. One of top plane for Z+ and for planar I have almost everything the side of the cut outs. Just doing a circle in the cylinder, line on the side of outside. But regardless of how I make a base alignment it will never probe the same place. It almost seems to relocate every time I restart. I struggle through inspecting the splines with Gear Pro. But now I am trying to measure some of cuts from center line and nothing is working. I am frustrate with this. Can someone help me out?
Thank you for any assistance.

Lou

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[[Ch...]]

are you using a planar feature - or a feature for rotational alignment ? say for example a tooth or a slot cutout, etc? Otherwise how would Calypso know how you load every part ??

[[Lo...]]

Chris,
I used a horizontal probe and probed a straight line down the side of the part. But I did think of using a tooth on the part. I can try it.
Thanks,
Lou

[[Ch...]]

Lou,

so do you mean a line in the -Z direction ?

If so, you should instead probe a feature oriented to the +X or +Y (from nominal CAD. It doesnt appear your 4 slots or 'tangs' are aligned to X/Y, but perhaps the face of a tang at +y.

Is there a tertiary datum on the drawing ?

[[DW...]]

Take four points on the top of the part to create a four point plane (RED).

Take two points on the small +X and -X planes (YELLOW).
Go to Features>3d Line. Recall feature points. Select the point in the -Y axis first, and the point in the +Y axis second.
Go to Construction>Projection. Project 3d line (YELLOW) to four point plane (RED).

Take four points to create a circle on the inside diameter (PURPLE).

Go to your base alignment.

The RED plane is your spatial in +Z.
The Projection (the YELLOW line to the RED plane) is your planar rotation in +Y.
Your X origin is the PURPLE circle.
Your Y origin is the PURPLE circle.
Your Z origin is the RED plane.

In lieu of a fixture to physically clock rotation, this is the best I think you can do. If you are only running one of these, I would suggest doing this manually for a base alignment. If you are running multiples and want to do a CNC alignment, come up with a way to roughly align your parts in the Y axis and give yourself enough clearance distance to not crash into the part when it measures the points to create your 3d line. Remember, your base alignment is only for part navigation.

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