The device is designed to make drawings, drawings and diagrams on sheets of A3 paper in accordance with GOST 2.301-68 (297x420 mm).
The design of the device provides sufficient accuracy of work when using it and in non-specialized conditions.
Please read this manual carefully before using the instrument.
The device kit includes:
- drawing instrument PChSh-12 (ПЧШ-12) - 1,
- screw A4x20 - 2,
- instruction manual - 1,
- packaging - 1
The device is a plastic base (drawing board), on which a removable pantograph device with a movable ruler is mounted.
There are scales on the movable ruler: two linear and angular (double for ease of reading). the latter, together with the pointer, serves to read the angle of rotation of the ruler. fixation of the ruler is ensured by the clamping handle.
Connection of the pantograph with the base is carried out by means of a clamping bar, which at the same time serves to hold the paper. The clamping bar is equipped with an auxiliary metal ruler.
Rubber feet on the reverse side of the base ensure that the device is held on an inclined (up to 15 degrees) surface.
when using a drawing device, it can be hung on a vertical wall, for which screws are provided in the kit, and there are two holes in the base, respectively.
Operating instructions:
The drawing instrument is produced prepared for drawing.
To secure the paper on the base of the drawing instrument, it is necessary to squeeze the clamping bar with one hand, and slip a sheet of paper under it with the other.
To rotate the ruler, you need to unscrew the handle and align the scale mark corresponding to the required angle with the sight line on the pointer.
Turn the handle.
WARNING: Overtightening the knob may destroy the instrument.
To speed up the execution of drawing and technical work, the marks of angles of 75 and 90 degrees are marked on the scale, and there is also a stop that limits the rotation of the ruler (clockwise) to an angle greater than 90 degrees.
When hanging the device on a vertical wall, you must first install the screws, unscrew the nut and, pushing the bracket off the axis (using a knife), remove the pantograph from the clamping bar.