I want to rotate by distance

[dumfatnhappy]

if I have a circle and want to rotate something (a hole) by say 16" along the arc how would I do that easily?

 

 

(I'm too old for this)

[paulmcz]

Rotate it by angle (deg) 16*180/pi/r, where r is radius of rotation

 

(defun c:r16 (/ r deg)
 (setq r (getdist "\n Radius?: ")
deg (/ (* 16.0 180) pi r))
 (command "rotate" pause "" pause deg))

[BIGAL]

ARC length = R*angle so 16=R*Angle note angle is in radians. Use entsel pick arc/circle get radius then pick object be aware angels are anti clockwise as default so -16 would be valid.

[steven-g]

Quick and dirty

Array ;select hole
path ;select arc
item ;type the word item then give 16 as the distance
2 ;2 items (the original and the new positioned one
exit the command and delete the first hole

[eldon]

Another way is to use Measure first on the circle, with the distance of 16.

 

Then use Rotate, using a couple of the marks from Measure as the reference.

 

Then you would have to clean up the measure marks

[BIGAL]

Another use Cal 16.0/rad copy answer when asked for rotation angle use paste, 2nd thought try rotate when asked for angle 'cal 16.0/rad not tested.

[ROBP]

I agree with Eldon

 

OP can always copy both original arc and circle paste it underneath the first one , then draw a line from center of the arc trough the the center of the circle,

then trim arc tail end , then use measure command on the arc by =16

copy the circle to the next point using node snap active , then copy the second circle with center base point of the first one and paste it on the original one.

[Bogbadbob658]

Then use Rotate, using a couple of the marks from Measure as the reference.

 

Or just grab it by the center grip and move it, snapping to the point. Just a few less key strokes.

[ROBP]

Or just grab it by the center grip and move it, snapping to the point. Just a few less key strokes.

 

Also right but if the arc is split into 16 inches apart and the circle is not on one of those point then it wont be at 16 inches from the first one

[khoshravan]

ARC length = R*angle so 16=R*Angle note angle is in radians. Use entsel pick arc/circle get radius then pick object be aware angels are anti clockwise as default so -16 would be valid.

 

What is entsel command?

[BIGAL]

(Entsel) to select an entity using lisp subequently you can get the entities properties in the case of a circle its radius plus others.

 

In about its simplest form to reveal properties (entget (car (entsel))) just copy it to the command line and pick a line circle etc.

 

(defun roang ( / oldang obj1 rad centpt ang)
(setq oldang (getvar "aunits"))
(setvar "aunits" 3)
(princ "\nPick Arc or circle")
(setq obj1 (entget (car (entsel))))
(setq rad (cdr (assoc 40 obj1)))
(setq centpt (cdr (assoc 10 obj1))) 
(setq ang (/ (getreal "\nEnter Arc distance") rad))
(princ "\nPick object to rotate")
(setq obj2 (entsel))
(command "rotate" obj2 "" centpt ang)
(setvar "aunits" oldang)
)
(roang)