Smooth and effortless tracking is accomplished
by fourteen uniquely designed flat face bearing rollers strategically placed
for precise vertical and horizontal movement at any board angle. A
comfortably designed palm rest and thumb release allows easy rotation of the
protractor head with convenient 15° auto index settings and intermediate
lockable fine line adjustment. The 360° protractor head with built-in
magnifier is divided into single degrees with 5-minute double venire
permitting angular accuracy to 1/12 of a degree. A double action hinge
system allows the head and scales to be tilted vertically from the board
surface for a clear working view and also allows the head to sit flat on the
board compensating for any board irregularities. A floating head mechanism
positions the protractor above the surface to protect against accidental
smearing or tearing of drawing media. An exclusive feature is the positive
double shoe braking system with dual lever fingertip operation precisely
controlling and locking both horizontal and vertical movement. Thus always
ensuring complete straight lines. Additional features include a one-touch
lever to install or dismount the vertical track, and an adjustable vertical
track support roller to accommodate both varying board depths and thicknesses. Each machine comes with a full protective plastic dust cover
large enough for both machine and drawing surface.For replacement scales, see the VAM Series.