Potentiometer

Potentiometer

Potentiometer TW sets

The GW motor gearboxes can be extended with a potentiometer. A potentiometer provides the position of feedback from the powered system to the climate or control computer. All GW motor gearboxes are prepared for the integration of the potentiometer system. The potentiometer system consists of a 10-turn potentiometer with a resistance value of your choice and a gear set determined by the number of revolutions the GW motor gearbox output shaft must make to achieve the total stroke of the driven system. The required resistance value of the potentiometer depends on the climate computer to which it is connected. This required resistance value must therefore be specified by the supplier of the climate computer. A complete order for a potentiometer set always consists of two article lines: the potentiometer and the gear set. The potentiometer system can be supplied separately or it can be built in if ordered with the motor gearbox.

The articlenumbers P.PM.TWS.--- are suitable for a number of revolutions of the output shaft of the GW. This number is given in the table under the column stroke. To calculate the stroke you need for your system use the s and S of your rack and pinion system. The "s" stands for the amount of millimeters the rack moves per revolution of the input shaft. The "S" stands for the maximum stroke of the selected rack. The required stroke is calculated with Stroke=S⁄s.

Next, find the first value higher than 'Stroke' in the TW Sets table.

For example:

• You choose a THG55, type of mounting does not matter. This has a stroke per revolution (s) of 36.19 mm/rev. For your system you need a stroke (S) of 1100 mm. The stroke is then: 1100 / 36.19 = 30.40
• The next stroke of a gear set is 31.50. You then need P.PM.TWS.31.50.
• If a delay in the system is used, such as a GWK. Then the stroke must be multiplied by the 'i' of this delay. For the GWK this value is 35.
• You choose a THG30. This has a stroke per revolution (s) of 138.23 mm/rev. For your system you need a stroke (S) of 1180 mm. The stroke is then: 1180 / 138.23 = 8.54 P.PM.TWS.8.64 is the next gear set that fits your system with direct ventilation. Suppose you have chosen indirect ventilation for your system and therefore used a GWK. This means there is a gearbox with a reduction factor i = 35 in your system. Then multiply the calculated stroke by 'i':
• 35 * 8.54 = 298.77 There is no gearbox suitable for this large number of revolutions, a suitable alternative is the I-DE.