How do you draw by technical drawing/mechanical drafting theory using AutoCAD 2014,the R2690 arc that tangent to R30 circle at point A,and tangent to R2100 arc at point B,and the R2100 arc is tangent to 3£ line?Thank you
dery2024-02-02 20:04:56

Is the curve from A toward B supposed to have a starting direction of 0 degrees, that is, be tangent to the little R30 Arc at its quadrant point, that is, is the center point of the R2690 Arc direction above A?  If so, draw a Circle from that center point using A for the radius, then draw a Circle using the Tangent-Tangent-Radius option, tangent to the first Circle in the vicinity of B and to the 3-degree Line, at the 2100 radius.  Trim appropriately. Whether B will end up 90 units below the one Line remains to be seen -- it may not be possible for all dimensions and radii and tangencies to be correct at the same time.Kent Cooper2024-02-02 22:24:43

Hello Dery and kent, I see parametric constraints shown on your image, this should solve "all" your "problems".Kent, your explanations won't fullfill the expectations of Dery as he wants a figured out ( on AutoCAD ) step by step drawing like I did on the previous discussion : How to Draw Arc with Known 3 Parameters.Dery, as a student you should invetigate more on those "simples" geometric exercises.

[QUOTE=Kent Cooper] Is the curve from A toward B supposed to have a starting direction of 0 degrees, that is, be tangent to the little R30 Arc at its quadrant point, that is, is the center point of the R2690 Arc direction above A?  If so, draw a Circle from that center point using A for the radius, then draw a Circle using the Tangent-Tangent-Radius option, tangent to the first Circle in the vicinity of B and to the 3-degree Line, at the 2100 radius.  Trim appropriately. Whether B will end up 90 units below the one Line remains to be seen -- it may not be possible for all dimensions and radii and tangencies to be correct at the same time.[/QUOTE]Hi Mr. Cooper, could you show me by image please.