perfect inside corner

Making PCB Layouts, Manual routing, Auto-routing, Copper pouring, Updating from Schematic, Manufacturing Output
Post Reply
Message
Author
Tony Philipsson
Posts: 32
Joined: 11 Jul 2011, 12:27

perfect inside corner

#1 Post by Tony Philipsson » 13 Jun 2017, 04:48

Most manufactures use a 0.1" bit to route the board edge
So minimum radius is 1.27mm as they will not attempt to make a 90deg inside edge.

1: define origin by mouse pointer, select the 90deg corner point.
2: insert two new board points at 1.27mm and 1.27mm
3: change the corner point as arc and move it to ±0.372mm and ±0.372mm
4: or move origin to one of the inserted points
5: move arc point to ±0.898 and ±0.372

Here are the arc position to make the radius so you board will look like what you get back.
2017-06-13.png
2017-06-13.png (15.51 KiB) Viewed 279 times

Tonydayes
Posts: 6
Joined: 04 Jul 2017, 06:21

Re: perfect inside corner

#2 Post by Tonydayes » 09 Jul 2017, 22:49

I think to arc corner would be 0.898mm and 0.628mm.

User avatar
KevinA
Posts: 639
Joined: 18 Dec 2015, 08:35

Re: perfect inside corner

#3 Post by KevinA » 10 Jul 2017, 05:50

I had the issue of the Raspberry PI HAT compliant radius on the corners and slots, I used TurboCAD to draw the board to HAT spec's in about 2 minutes then saved as DXF. I can fudge a simple rectangle without going too crazy but using X & Y entry reminds me of AutoCAD in the old days.
Nice piece of work on the Arcs

Post Reply