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Author Topic: parabolic equasion in axis formulas to correct deflection?  (Read 3705 times)

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Offline abhi

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Re: parabolic equasion in axis formulas to correct deflection?
« Reply #10 on: July 15, 2012, 12:43:06 AM »
hmmm. i put the same into max and got a different result result... I checked my float accuracy and its got 1/3 = 0.333333

(
   x=0
   y=1
   maxy =   36
   maxdef =   0.1

   a = x+ (1-(y/maxy))^2*0+2*(1-(y/maxy))*(y/100)*maxdef*2+(y/maxy)^2*0   
   print a
)
0.0
0.0
Ill reproduce in exel

Offline abhi

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Re: parabolic equasion in axis formulas to correct deflection?
« Reply #11 on: July 15, 2012, 12:50:07 AM »
Gah! silly me
Y=1 should have a non zero number as the bottom of the range as i have put it is 0 not 1, my app is rounding a small number i think.

is that what you mean.

the base equation is from:
http://processingjs.nihongoresources.com/bezierinfo/

Offline abhi

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Re: parabolic equasion in axis formulas to correct deflection?
« Reply #12 on: July 15, 2012, 12:58:21 AM »
should have read the bottom of your post...
yes its a multitude of issues due to my spindle being to heavy so it both sags by approx 0.1 mill in the middle and the z axis twists along the y axis (evil) Im looking at fixing these things as I can and the budget becomes available through adding counter tension and load bearing solutions.
Re: parabolic equasion in axis formulas to correct deflection?
« Reply #13 on: July 15, 2012, 10:03:21 AM »
Thanks for the bezierinfo post, interesting reference material that led me to some interesting sites.

Offline abhi

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Re: parabolic equasion in axis formulas to correct deflection?
« Reply #14 on: July 15, 2012, 10:07:02 AM »
no worries :)