Dang...
I had a real nice post going, then my old system crashed and lost it all. This time I'll keep it shorter.
Needed to make one of these. A door rotor latch for my truck.
To get all the x-y coordinates, radii, and angles I scanned it...
Used AutoCad to scale and trace the profile of the digital image into the program as a model. I knew the OD and the diameter of the central hole, and the overall length.
I also drew a degree wheel centered on the part and aligned it with one of the flats of the lobes. Used the ordinate dimensioning feature of the program to get the x-y positions of various features. In this picture I'm simulating the cutting of the included angles for the tips of the lobes and the degree angle for machining. See the little "tick" mark on the upper right ~155 degrees.
Another image showing x-y positions for the inside curves for each lobe...
A shot of the milling progress...
The system here won't let me show the installation pictures, but you get the idea. It's now in service for about a month and working fine in my old 1960 Dodge truck.
Hope this helps someone with an oddball repair job.
Rich
I had a real nice post going, then my old system crashed and lost it all. This time I'll keep it shorter.
Needed to make one of these. A door rotor latch for my truck.
To get all the x-y coordinates, radii, and angles I scanned it...
Used AutoCad to scale and trace the profile of the digital image into the program as a model. I knew the OD and the diameter of the central hole, and the overall length.
I also drew a degree wheel centered on the part and aligned it with one of the flats of the lobes. Used the ordinate dimensioning feature of the program to get the x-y positions of various features. In this picture I'm simulating the cutting of the included angles for the tips of the lobes and the degree angle for machining. See the little "tick" mark on the upper right ~155 degrees.
Another image showing x-y positions for the inside curves for each lobe...
A shot of the milling progress...
The system here won't let me show the installation pictures, but you get the idea. It's now in service for about a month and working fine in my old 1960 Dodge truck.
Hope this helps someone with an oddball repair job.
Rich
