The easiest way to draw a graph is to draw the x- and y-axis first using the ruler and measurements on the TactiPad, and then place the GraphGrid on the drawing board. You can use the higher rubber bands as axes by letting them coincide with the axes drawn on the paper.
You can then easily count and draw the x and y values of the graph along the flexible grid lines. Because the grid lines are flexible, the graph values can be drawn exactly at the intersections.
Once you have drawn all the coordinates of the graph, you can remove the GraphGrid and create the graph by connecting the points. If you want to create multiple graphs in the same coordinate system, it is recommended to finish one graph before starting with the next to avoid confusion between the two sets of points.
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03. GraphGrid – Basic usage of the GraphGrid
In many different drawings, a regular grid of cells, columns and rows can provide useful guidance. For example, you can make beautiful creative drawings with repeating patterns in the cells. Many puzzles and games are played on a game board made up of squares, such as battleships and tic-tac-toe. In games like Yahtzee you can keep your own score by tallying in the squares. The higher rubber bands that are placed around the frame can be used to distinguish different parts of the game board or the scorecard.
In school there are many applications where the graph paper of the GraphGrid is useful. Using the cells can help with learning to count or to learn the tables of multiplication. In secondary school, the GraphGrid is ideal to use in mathematics to draw graphs or make bar charts to present statistical information.
02. Graphgrid – Rubber bands as grid lines and axes
Low and high rubber bands – Using differences in height
The framework of the GraphGrid has a thickness of four millimeters. Therefore there is a well distinguishable difference in height between the bands that run along the outer or the inner part of the frame. The lower rubber bands that are attached to the hooks run alongside the inner part of the GraphGrid and can lay flat on the drawing surface. The higher rubber bands are placed in the indents along the outer edge. The rubber bands can be placed horizontally and vertically or at an angle at any position, with a minimum distance of 1 centimeter.
(Re)placing the grid lines and axes
The hooks and indents are positioned every centimeter along the frame, so the minimum cell dimensions are one by one centimeter. To form a larger grid, you can also place the rubber bands two or more centimeters apart by alternately skipping one or more hooks. Additional rubber bands for more grid lines and axes are supplied with the GraphGrid. These are standard, thin rubber bands with a length of 12 to 15 centimeter.
To keep the rubber bands in place, the hooks have such a shape that the rubber bands will not come loose if they are positioned properly in the frame. (Re)placing a rubber band is easiest if you hold the rubber band with two hands, keeping it perpendicular to the frame so you can slide it through the slot to the end of the hook. First of all, you span the rubber band in two opposing hooks, so that it forms a double line between two sides of the GraphGrid. You then take the upper of these two lines and slide it into the next two hooks to form the second grid line.
The higher rubber bands are stretched around the outside of the GraphGrid and fall naturally into the indents. It is possible that the desired position of one of these rubber bands coincides with the position of one of the knobs. Therefore, the holes in the GraphGrid around the knobs are extra-long so you can slide the knobs aside for the desired placement of the rubber band.
07. TactiPad – Drawing tools – Magnets in the sides
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.
06. TactiPad – Drawing tools – Using pins
Using pins
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.
05. TactiPad – Drawing tools – Compasses
Compasses
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.
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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.
04. TactiPad – Drawing tools – Protractor
Protractor
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.
03. TactiPad – Drawing tools – The set square
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.
02. TactiPad – Drawing tools – The Ruler
The ruler
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.
01. Digital Pen – Introduction
Note: Since summer 2022, the Digital Pen has not been for sale anymore. This manual is for users who still own this former Thinkable product.
The TactileView digital pen is a special version of a ballpoint pen. The pen writes in ink like a normal pen, but at the same time determines the position of its tip on the drawing surface. In the pen’s tip is a small transmitter, which sends a signal to a receiver. Upon moving or clicking in the drawing surface with the pen, the receiver transmits this position to the TactileView software, just like with a regular computer mouse. Visual impaired people can operate the TactileView software using the TactiPad or TactileView ClickPad.
The pen functions as a drawing tool and transmits to the computer what has been drawn, or as a cursor by transmitting on which location has been clicked. This way, the digital pen enables the user to make a digital version of a tactile diagram or to explore a tactile diagram with speech and sound.