Hey my apologies! It does work I was just looking at it the wrong way. I layed out every cut in cad and it was spot on! Please ignore my next 3 posts!
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CamCalc never worked?
- Thread starter stevehuckss396
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Help Support Home Model Engine Machinist Forum:
I've replied on MEM, Rod who wrote it is also a member there
It does not cut as your first image shows but does cut as the outer line on your second image
It does not cut as your first image shows but does cut as the outer line on your second image
Hey my apologies! It does work I was just looking at it the wrong way. I layed out every cut in cad and it was spot on! Please ignore my next 3 posts!
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I haven't used the camcalc app myself but I have seen similar issues with cam profiles from plans. Maybe related, maybe not, but one thing you may want to check is tangency between the arcs (assuming they are arcs). Depending on what parameters are predefined vs. what are resultant to satisfy defined parameters, there may be slight variations to the curve shapes and/or intercept positions. Some CAD programs provide some visual indication of fully defined vs. partially defined, but I suspect you know that already.
Another issue I have come across is: the cam profile can be fully defined, but when you overlay the profile of a cutter at certain points, it may 'dig into' a neighboring area as a function of the cutter profile itself (say a large diameter ball EM on a small cam). Its the same issue a cam lifter following a cam profile but yielding different open/close position than the cam because it sees tangency on its flank before or after the actual start/end position of the cam. An easy way to visualize in CAD is divide up the cam curve by N segments & overlay the cutter on tangent points. If it undercuts neighboring area, you know something needs to be corrected. Hope this makes sense.
Another issue I have come across is: the cam profile can be fully defined, but when you overlay the profile of a cutter at certain points, it may 'dig into' a neighboring area as a function of the cutter profile itself (say a large diameter ball EM on a small cam). Its the same issue a cam lifter following a cam profile but yielding different open/close position than the cam because it sees tangency on its flank before or after the actual start/end position of the cam. An easy way to visualize in CAD is divide up the cam curve by N segments & overlay the cutter on tangent points. If it undercuts neighboring area, you know something needs to be corrected. Hope this makes sense.
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Steve have a look at my replies on MEM, I've shown where the height from CC is the outer line not as per your first image
I also pointed out that CC angle starts where the flank meets the base radius not the high point of the cam so you need to make adjustment for that on your drawings.
Post your cam profile details and I'll put that into CC and show you it's right.
https://www.modelenginemaker.com/index.php/topic,11557.msg270715.html#msg270715
I also pointed out that CC angle starts where the flank meets the base radius not the high point of the cam so you need to make adjustment for that on your drawings.
Post your cam profile details and I'll put that into CC and show you it's right.
https://www.modelenginemaker.com/index.php/topic,11557.msg270715.html#msg270715
Hey my apologies! It does work I was just looking at it the wrong way. I layed out every cut in cad and it was spot on! Please ignore my next 3 posts!
