In PLUS RepliCAM like line, there are two option to draw an arc. They are as follows
From above figure you can understand how to draw arc with 3 points. Mark Start-P1, Middle- P2 and End point - P3 as shown.
Select 'Arc 3 Point' tool from Insert menu or from Entity toolbar.
Mark 1st point (P1) s shown in fig.
Mark the 2nd point ( P2). Then a line will be creted.
To decide its length mark the 3rd point (P3).
You will get an arc with passing though this 3 points.
Arc N Points : This is another and good option to draw an 'Arc'. If Template' edge is rough or joining point of arc end and other entity is confusing then its possible to create error while drawing arc relative to that edge and you will get arc of wrong length. To avoid this error use 'Arc N Points'. To select this choose'Insert Menu > Arc N Points' and start marking from one end to other end of curve, also use zoom window for more accuracy while selecting points. After marking 4-5 points press right key of mouse to end the Arc.
From above figure you can understand how to draw arc with N points. Mark no. of points on templates edge though its edge may not smooth but you will get arc with good accuracy.
Select 'Arc N Points' tool from Insert menu or from Entity toolbar.
Mark the first point
After Marking 1st point, start no. of point to marks with reference to that you want to draw an arc. Marking Pn point press right button of mouse to end that and you will get desired line.