More on compound angles

• posted

Here is the answer I was looking for some time back. It has been great
revision for me and I have had considerable help from a mathematics forum.
The problem was to find the set-up angles required to make a skewed milling
cut in a rectangular block following given angles on three of its surfaces.
Image here:
angles are A, B and C in planes YOZ, XOZ and XOY respectively.This is a
right handed coordinate system with angles X -> Y, Y -> Z and Z ->X being +ve.1.
Align vice jaws // X.2. Set block in vice so that line at angle A is // to XOY3.
Tilt vice by angle D to XOY. WhereD = atan(cosAtanB)4. Rotate vice by angle E
from XOZ. WhereE = atan(cosAsinC/(cosCcosD-sinAsinCsinD))John.
• posted
Sorry, something got screwed up in the formatting.
Here is the answer I was looking for some time back. It has been great revision for me and I have had considerable help from a mathematics forum.
The problem was to find the set-up angles required to make a skewed milling cut in a rectangular block following given angles on three of its surfaces.
Image here:
angles are A, B and C in planes YOZ, XOZ and XOYrespectively.This is a right handed coordinate system with angles X -> Y,Y -> Z and Z ->X being +ve.1. Align vice jaws // X.2. Set block in vice so that line at angle A is // to XOY3. Tilt vice by angle D to XOY. WhereD = atan(cosAtanB)4. Rotate vice by angle E from XOZ. WhereE = atan(cosAsinC/(cosCcosD-sinAsinCsinD))John.
• posted
Sorry I don't seem to be able to fix this.
• posted
"Machinist60" fired this volley in news:i3fr5f\$tqm\$ snipped-for-privacy@news.eternal-september.org:
It's a great revision for me, too, to need considerable help from a mathematics forum for something that has been tabulated for woodworkers for over a century.
LLoyd
• posted
What's that Lassie? You say that Machinist60 fell down the old rec.crafts.metalworking mine and will die if we don't mount a rescue by Thu, 5 Aug 2010 22:04:39 -0400:
Looks like you needed a space after your URL
• posted
Another attempt to get the formatting right on Dan's advice. I searched up and down and asked about this some time back. Nothing came to light, I guess because this use group was not around a century ago and nor was I.
Here is the answer I was looking for some time back. It has been great revision for me and I have had considerable help from a mathematics forum.
The problem was to find the set-up angles required to make a skewed milling cut in a rectangular block following given angles on three of its surfaces.
Image here: