Hi Guys
I am having a problem with an MCCM move in RsLogix 5000 v20. I don't have a problem with the actual implementation of the MCCM but I am having a problem calculating a 3rd point on the arc or the center of the sphere. One of these is necessary to use the MCCM instruction.
Here is what I am trying to do. In the attached PDF you can see a (very poor) drawing of the movements I am trying to do. The 3 linear Movements are not causing any problems however the two curved sections are. Lets focus on the first one (between points B & C) as the second one is pretty much the same just decending.
I have spent most of the afternoon trying to figure out either a 3rd point on the arc or the center of the sphere. However I dont really know how to go about this. My first thought was to create a sphere between Points B & C and generate its equation:
Radius: sqt(1200)
Center: (20,20,30)
Equation: (x - 20)^2 + (y -20)^2 + (z-30)^2 = 1200.
However this gives me 1/2 of a sphere (hemisphere) between the two points where as I actually need 1/4 of a sphere between the two points.
This equation may however be useful, I am not really sure. I cannot give a concrete reason for this but my mind keeps telling me that if a sphere of radius sqt(1200) gives a 1/2 of a sphere between my two points then a sphere of radius spt (2400) should give a 1/4 of a sphere between those two points (assuming a different center). Maybe thats just me thinking in 2d I'm not sure.
So perhaps I have 3 pieces of information about the sphere or perhaps only 2.
My grasp of 3d Trigonometry has been exceeded by the looks of things and I need the help of this forum. Hopefully somebody can help me. I have done this movement in a 2d Pick and Place innumerous times (although without the Y movement only XZ).
Has anyone done anything like this before or can anyone suggest a way to calculate a point on the arc or the center of the sphere?
All help greatfully appreciated
Regards
Ian
I am having a problem with an MCCM move in RsLogix 5000 v20. I don't have a problem with the actual implementation of the MCCM but I am having a problem calculating a 3rd point on the arc or the center of the sphere. One of these is necessary to use the MCCM instruction.
Here is what I am trying to do. In the attached PDF you can see a (very poor) drawing of the movements I am trying to do. The 3 linear Movements are not causing any problems however the two curved sections are. Lets focus on the first one (between points B & C) as the second one is pretty much the same just decending.
I have spent most of the afternoon trying to figure out either a 3rd point on the arc or the center of the sphere. However I dont really know how to go about this. My first thought was to create a sphere between Points B & C and generate its equation:
Radius: sqt(1200)
Center: (20,20,30)
Equation: (x - 20)^2 + (y -20)^2 + (z-30)^2 = 1200.
However this gives me 1/2 of a sphere (hemisphere) between the two points where as I actually need 1/4 of a sphere between the two points.
This equation may however be useful, I am not really sure. I cannot give a concrete reason for this but my mind keeps telling me that if a sphere of radius sqt(1200) gives a 1/2 of a sphere between my two points then a sphere of radius spt (2400) should give a 1/4 of a sphere between those two points (assuming a different center). Maybe thats just me thinking in 2d I'm not sure.
So perhaps I have 3 pieces of information about the sphere or perhaps only 2.
My grasp of 3d Trigonometry has been exceeded by the looks of things and I need the help of this forum. Hopefully somebody can help me. I have done this movement in a 2d Pick and Place innumerous times (although without the Y movement only XZ).
Has anyone done anything like this before or can anyone suggest a way to calculate a point on the arc or the center of the sphere?
All help greatfully appreciated
Regards
Ian
