1.1. Rotary Cam Switch GSW100
LEONARD rotary cam switches GSW100 (see figure 1.1.1 and 1.1.2) are cased in housings made of cast aluminum and fitted out with mechanic switching elements. The technical data of all available switching elements are listed in figure 1.0.1.
The rotary cam switches GSW100 are normally available with 3, 6, 9, 12, 15 and 20 switching elements. The cam shaft (spindle) comes out on both sides of the housing so that several switches can be coupled together. The second end of the shaft, which is normally unused, is protected by a safety cover. The transparent safety cover has some index marks for the scale ring underneath. The cam shaft is mounted in two deep groove ball bearings and maintenance-free.
To actuate the individual switching elements the cam shaft is fitted with cam disk sets in a pitch of 20 mm (see figure 1.1.5). Each cam disk set consists of the components listed in figure 1.1.3.
The infinitely adjustable cam disk sets, which run almost entirely free from GSW100unbalance by virtue of their special design, are individually tensioned by disc springs. This tension is such that all cam disk sets can be adjusted when the clamp nut is slackened. After setting all the cam disk sets the complete adjustment can be checked on start up for trial operation. Only after all switching adjustments have been tested, the clamp nut is tightened against the disc spring. All cam disk
sets are positively located in the position set.
The normal cam rings have 180° long cams. For switching elements with force separation the cam rings are available with cam length of 15°, 30°, 45° or 90°.
For the application from rotary cam switches on presses our switches are optionally available with an additional clamping device. In this case, after all adjustments have been carried out, the clamping element of each cam disk set is tightened against the cam disk set by turning the clamping screw clockwise form underneath. When the cam disk sets have been locked in this way they cannot be moved out of position even though the clamp nut is slackened and the preliminary tension has got over. The cam disk sets can be permanently secured to prevent unintentional or unauthorized adjustment by additionally caulking the clamping screw slots.
The cam rings and graduated disks have a diameter of 100 mm and a scale of 360° with a graduation of 2°, though a high and precise switching angle resolution is provided. The accurate adjustment of the switching points is guaranteed, because the cam rings have a switch-on and switch-off point index mark. The cam rings as well as the graduated disks are made of die-cast aluminum. Thus reduces the inertia forces and increases the life of the deep groove ball bearings. Based on the surface protection of the cam rings and the graduated disks, they are “hard coated”, a maximum of surface hardness, a maximum of corrosion protection and a maximum of resistance to seawater and many chemical substances is guaranteed.
All parts of the switching element actuator (see figure 1.1.4) are of zinc die-casting and surface traded or of acid-resisting stainless steel. The roller is produced from wear-resistant plastic and is self lubricating. The rotary cam switches dispose of ideal anti-friction properties. Therefore the wear of the rollers in the roller levers is reduced to a minimum.
Fig. 1.1.1: Rotary Cam Switch
GSW100-06 MNS without Cover
Fig. 1.1.2:
Presses Safety Cam Switch GSW100-03 MNS-2PI without Cover
Fig. 1.1.3: Cam Disk Set GSW100
1 = carrier disk
2 = cam rings
3 = graduated disk
4 = plate spring
5 = retainer ring
6 = clamp spring
7 = clamp nut
Fig. 1.1.4:
Switching Element Actuator GSW100
1 |
= bracket |
6 |
= adjusting screw |
2 |
= contact holder |
7 |
= self-locking nut |
3 |
= roller lever |
8 |
= compression spring |
4 |
= roller |
9 |
= switching element |
5 |
= return spring |
10 |
= contact strip |
1.1 |
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