TIANJIN BAILI ERTONG MACHINERY XZA Series, Руководство по эксплуатации

Страница: 8 / 16

6
6.2 Precise stroke adjustment
If, when the valve is electrically operated, the stroke switch controlled end point
position (full closing or full opening) of the valve is unsatisfactory, precise adjustment
should be performed to get perfect position precision. The way of precise adjustment
is to adjust the cam action in a little delay for incomplete opening or closing or to
adjust the cam action in a little advance for a little excess opening or closing.
Precise adjustment of full closing position:
a. If valve closing is incomplete, you should, based on the primary adjustment,
manually operate the valve properly to complete closing position. Then set down the
carrier rod of counter, make central gear throw out of mesh with one-digit gear of the
counter. (Now, closing cam still presses on microswitch.) First turn closing adjustment
shaft anti-clockwise to make closing cam leave microswitch, then turn closing
adjustment shaft clockwise to make closing cam press on microswitch. Afterwards,
turn and lift carrier rod of counter to check the meshing of central gear with one-place
gear of counter. If the meshing is proper, end the adjustment.
b. After valve is closed, torque control switch has acted in advance and closing cam of
stroke switch has not yet pressed on microswitch. In this case, stroke switch action
lags behind torque switch action. If you do not want torque switch to act, you can
manually operate valve to make it properly move to opening direction on the premise
of ensuring valve closing requirement. Then set down carrier rod of counter to make
central gear throw out of mesh with one-digit gear of the counter. (Now, closing cam
does not press on microswitch.) And then turn closing adjustment shaft clockwise to
make closing cam press on microswitch. Afterwards, turn and lift carrier rod of
counter to check the meshing of central gear with one-place gear of counter. If the
meshing is proper, end the adjustment.
6.3 Considerations before and after setting counter
Fig.5

Before setting first check if the cam is in the position shown in Fig.5 and if the
carrier rod has been screwed down.

When performing item e of 6.1 Primary stroke adjustment, if the valve has not
been opened completely but cam has pressed on microswitch, you should stop