| Gallery, Projects and General > How do I?? |
| Checking a 45 degree square? |
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| vtsteam:
Rich, along the lines of Fergus' suggestion, lay a straightedge on a metal plate and clamp it down. Lay a square on the plate butting on the straightedge. Lay your new (but reasonably close) angle casting on the plate with its vertex at the square and straightedge juncture, and one edge along the straightedge. Scribe the other casting edge on the plate. Also mark the outer end point. Flip over and shift the casting so it contacts the square's edge, and again shares a vertex with the two standards. Scribe a second line on the plate. Again mark the outer end point. (Since you flipped it, that should be the same distance out.) If the two lines correspond, you're at 45 degrees. If not, measure half the distance between the two endpoints, draw a line between the two, mark the point, and scribe a line from there to the vertex. That will be at true 45 degrees. Clamp a second straightedge to the 45 degree line and scrape your casting to either straightedge as a reference surface, bearing against the other. |
| Pete.:
Why exactly? Scraping references are usually less of an angle than the dovetail, and many (probably the greater proportion) are not 45 degrees. |
| Fergus OMore:
All of this appeared in several references by Philf only in March this year. Why the repetition at such a short interval, please? Thank you Phil. I did read- well most of it. :scratch: Norman |
| Arbalist:
Who's Philf? :scratch: |
| Fergus OMore:
Philf? Isn't he a Hero Member here with 500 odd posts |
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