Milnor KURSPK0026 Manual Do Utilizador

MSSM0116AE/8809BV

SETTING LIMIT SWITCHES

Limit Switches—Including Microswitches—

Will Be Damaged If Over-actuated!

Any limit switch will be damaged if it bottoms out forcefully. This can bend the rotary shaft or damage

internal components and may cause the switch to stick in one position either permanently or intermittently. Be
aware that an intermittently sticking switch can be mistaken for a malfunctioning microprocessor!

Limit switches must function properly to ensure the safe operation of the machine.

☞

Inspect switches regularly.

☞

Never operate a machine with a malfunctioning limit switch.

Setting Switches

Travel of Rotary Lever or Plunger

—Set switch and target so that after the switch contacts close (as de-

termined by an ohmmeter), the lever or plunger will then move approximately half of its additional available travel
(see FIGURE 2).

NOTE: It is impossible to determine by feel, sound, or experience at what point the switch contacts make.
The only reliable method is to use an ohmmeter. Switches may also be bench-tested, and the plunger or
rotary shaft scribed to mark this point.

FIGURE 1a
Rotary Lever Switch

FIGURE 1b
Plunger Switch

FIGURE 1c
180° Roller
Plunger

FIGURE 1d
90° Roller Plunger
Switch

FIGURE 2a
Rotary Lever

FIGURE 2b
Plunger Switches
(Roller Plunger Switch Shown)

FIGURE 1

(MSSM0116AE)

Limit Switch Types

FIGURE 2

(MSSM0116AE)

Where Lever or Plunger Should Stop