Programmable braking device
AssigneeMarabuwerke Erwin Martz GmbH & Co.
InventorGustav Thorban
Life of this patent
Estimating the term…
Abstract
There is indicated a programmable braking device for the X guide block (18) and the Y guide block (30) of a drafting machine which comprises a brake band (42, 60) which is moved together with the considered guide block. The band revolves around guide pulleys (38, 40; 62, 64), which are arranged laterally outside the displacement path, and is lockable by an associated magnetic brake (44-58; 70-76). In a modified programmable braking device, the guide block (30) carrying the drafting head carries two direction brakes (130, 132) for the two co-ordinate directions. These brakes each comprise a freely running belt conveyor which is movable against the drawing surface in a friction grip.
Claims17
A programmable braking device for a guide block that serves to move the drafting head of a drafting machine, which comprises:
- (a) at least one sensor that senses the actual coordinate position of the guide block,
- (b) an input unit for inputting the desired coordinate position of the guide block,
- (c) a computing circuit to which the output signals emitted by the sensor of (a) and the input unit of (b) are applied and which provides an output signal if the actual position of the guide block is identical with the desired position of the guide block,
- (d) a servo-braking device interconnected with said guide block which servo-braking device is activated by the output signal emitted by said computing circuit to thereby lock the guide block against further movement,
- (e) draw means that move around pulleys,
- (f) said draw means that move around pulleys being connected to said guide block, and
- (g) said servo-braking device being positioned close enough to said draw means that move around pulleys so that there is engagement thereof when the guide block is to be locked against further movement.
A programmable braking device for a guide block that serves to move the drafting head of a drafting machine over a drafting table, which comprises:
- (a) at least one sensor that senses the actual coordinate position of the guide block,
- (b) an input unit for inputting the desired coordinate position of the guide block,
- (c) a computing circuit to which the output signals emitted by the sensor of (a) and the input unit of (b) are applied and which provides an output signal if the actual position of the guide block is identical with the desired position of the guide block,
- (d) a servo-braking device interconnected with said guide block, which servo-braking device is activated by the output signal emitted by said computing circuit to thereby lock the guide block against further movement,
- (e) said servo-braking device comprising a brake anchor plate (128) which is rigidly connected to the drafting head carrier (3) and which carries at least one part (172) which revolves around an axis that is parallel to one co-ordinate direction, and a drive (148, 150) for moving this part (172) in the direction that is vertical to the drawing table (10) and which has a braking position which is in frictional contact with the drawing table (10).
Dependencies are inferred from the claim text.