Fascinating math! Makes me wish I would have studied coordinate transformations a little harder way back when. Do you have any references on CNC coordinate systems I could use to knock some of the cobwebs out of the old brain? Thanks for posting on this subject.
Cool. Have you been able to determine final precision or accuracy? Sometimes the resultant cores looks nice but are undersized vs the profile due to the wire width and melting of the foam. Also, how easy is it to import the airfoil coordinates and how many points were needed? Nice work as always.
@Fearlessthinker Precision and accuracy are tough to determine. There will be areas of the work zone where the tool will move faster and slower per step. Of course a threaded rod doesn't make for the most accurate lead screw either. I used 60 data points on this one. I'm working on a video to show the electronics, programming, and another to show the spread sheet calculations. It's all a bit dry, but I wanted to document it for anyone who is interested.
@Fearlessthinker The undersized problem can be corrected by adjusting the tool positions. I'm not too concerned about it right now because I plan to put fiberglass over it and that will build the thickness up a smidgeon. The airfoils are coming out about the length that I'm looking for. If I were to make a rough guess at the accuracy, I'd say it is close to +/- 0.030" not super, but good enough for me (for now). :-)
I would while away the hours talking to the flower and conversing with the rain if I only had a brain.. I think I'll stick with guessing...lol
depravedpuma 8 months ago
This video shows me that i'm just not that smart. LOL
You on the other hand are a very smart man.
Great video
Greetings from Belgium
Erik
rikkiesix 9 months ago
@rikkiesix Don't be too impressed. A lot of it is just repeating things I was taught in a robotics class many years ago. :-)
Caleb6543 9 months ago
Fascinating math! Makes me wish I would have studied coordinate transformations a little harder way back when. Do you have any references on CNC coordinate systems I could use to knock some of the cobwebs out of the old brain? Thanks for posting on this subject.
Roy Lewis Atlanta, Georgia USA
rlewis1946 9 months ago
Cool. Have you been able to determine final precision or accuracy? Sometimes the resultant cores looks nice but are undersized vs the profile due to the wire width and melting of the foam. Also, how easy is it to import the airfoil coordinates and how many points were needed? Nice work as always.
Fearlessthinker 9 months ago
@Fearlessthinker Precision and accuracy are tough to determine. There will be areas of the work zone where the tool will move faster and slower per step. Of course a threaded rod doesn't make for the most accurate lead screw either. I used 60 data points on this one. I'm working on a video to show the electronics, programming, and another to show the spread sheet calculations. It's all a bit dry, but I wanted to document it for anyone who is interested.
Caleb6543 9 months ago
@Fearlessthinker The undersized problem can be corrected by adjusting the tool positions. I'm not too concerned about it right now because I plan to put fiberglass over it and that will build the thickness up a smidgeon. The airfoils are coming out about the length that I'm looking for. If I were to make a rough guess at the accuracy, I'd say it is close to +/- 0.030" not super, but good enough for me (for now). :-)
Caleb6543 8 months ago
@Caleb6543 Sounds a bit dirty. It must be the weekend! My S.O. loves the geek talk in bed. I may have to use some of your material. ;-)
Fearlessthinker 8 months ago