| Gallery, Projects and General > How do I?? |
| How do i make a step cutting diagram. |
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| andyf:
I'm a simple soul, and to do something similar I scaled up as far as a piece of graph paper would allow (in my case, I think a single square represented 0.1 or 0.2mm), drew a quarter circle, and read the co-ordinates off the X and Y axes of the graph. Or, I have a program which gives the co-ordinates for drilling a ring of holes around a given PCD. That would adapt to the job if told to calculate for a large number of small diameter holes. Nice little program, but I can't remember where I found it. Andy PS I think this is it < http://swarfer.co.za/lathe/pcd.php > |
| NeoTech:
So basicly this is what i got out from it. I think i will take the paper approach to this - The math was usefull though, it made it easier to understand.. =) |
| S. Heslop:
If you use google sketchup (a free cad program with an emphasis on being easy and intuitive to use, even if it is a bit limited) you could draw a circle of the number of sides you want by typing "Xs" into the dimensions box and hitting enter, to give X amounts of sides. Then join them up with lines and measure them directly. It's not as elegant as doing it mathematically but it should work. |
| vtsteam:
Now that you have your steps, you might be interested in a good procedure, also mentioned by Lautard, if I remember correctly. Without a DRO, you cut from the center toward either end of the curve, rather than from one end to the other end. If you cut from the center both ways, you won't have to wind the cross slide out and in again for backlash compensation on each step past the midpoint in the sequence. Hope I've got that right. Don't have the book in front of me. |
| tom osselton:
So hows the english wheel coming? :coffee: |
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