The ruler’s width is 4 centimeters, and it reaches 43 centimeters long. With this length, it stretches diagonally all the way over the entire drawing surface. At one end of the ruler, a 2 centimeter wide round hole is made. In the rest of the ruler there’s a 2 centimeter wide groove. The hole and groove function to fixate the ruler in any direction across the drawing surface, by screwing the knobs.
Little slots indicate the 5 centimeter distance in between. The ruler has a measure designation on both sides, for a length of 35 centimeters. When horizontally or vertically placed, with the hole over a knob, the zero of the ruler is on the edge of the sheet. For drawing a line at a precise position, take in account that the rulers edge is 1 centimeter wide.
The set square
The rectangular 45-degrees triangle has the same measure designation as the drawing board. The two short sides have a measure designation of 10 centimeters, while the long side has a measure designation of 14 centimeters. An indication on the middle of the long side makes it easy to draw a perpendicular.
There are four holes in the set square for fixing it over the knobs. The round hole in the 90 degree corner fits around a knob.
By putting one of the short sides of the triangle aligned with the edge of the frame, the set square creates two angles on the board, one of 90 and one of 45 degrees.
The protractor makes half a circle with a 7 centimeter radius. In the middle of the straight side a 2 centimeter wide semi-circular hole has been made, to easily place the protractor on a line, or combine it with the ruler or a knob. On the round side, there are little indication points per 10 degrees. At each 10 degree point around the edge there is also a small notch, to help you precisely place your pen. Little slots on the top surface indicate the usual 30, 45, 60 and 90 degrees angles.
The protractor has five round holes of 0.5, 1, 1.5, 2 and 2.5 centimeters in diameter, to easily draw circles.
The compasses are made out of two main parts: a beam and a base. The beam has a turning point on one side and a pointy shape for drawing circles on the other. You can put the turning point, which will be the center of the circle in the base. The base, which has three strong magnets, keeps the compass in place on the TactiPad board, which has a metal layer below the drawing surface. The beam can be moved around the base clockwise and counterclockwise just above the sheet. The beam has as special ball mounting, so you can slightly tilt the beam. This makes it easier to draw a circle with the pointy shape.
Positioning the center
The base has a semi-circle shape with a diameter of almost 6 centimeters, with three little legs pointing out. It looks a bit like a round capital E. The middle leg has the shape of a triangular arrowhead of which one corner has been cut out. The arrowhead can be used to precisely place the center of a circle on a specific point in the drawing.
Adjusting the radius
The pointy shape which is used to draw the circles can slide along the beam. The beam has a measure designation per 0.5 centimeters. Using this indication you can set the radius with 0.5 centimeter increments. The smallest possible circle you can draw is 3 centimeters, whilst the largest is 12 centimeters.
Tactile center indication
The bottom end of the turning point has three very small spikes. When you press and turn the knob on top, without moving the whole beam, a small tactile circle is created. This way you can indicate the center of the circle drawn.
The rubber layer of the drawing board is 4 millimeters thick, which makes it ideal to stick pins in it. You can use pins for precisely positioning the drawing tools. Or to mark a certain point on a line after a measurement.
Magnets in the sides
In three edges of the frame two small magnets have been attached. These magnets are used to position the frame for the reciever of the TactileView digital pen on the drawing surface. In combination with the TactileView drawing and production software, the drawings can be digitized.