Huvema CRDM 3050 x 16/1, Operation Manual

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clamp, at the same time, piston pushes the limit switch SQ3 by spring reed to
make switch off the AC contactor KM5, motor M3 stop turning.
Limit switch SQ1
（
SQ1a
、
SQ1b
）
is to limit the travel of arm, limit switch
SQ1
（
SQ1a, SQ1b
）
acts when arm reaches target position, AC contactor KM2
breaks, motor M2 stop turning, arm stops vertical movement.
The automatic clamp of arm is controlled by the limit switch SQ3, and there
are several conditions which the hydraulic pressure motor will overload run for a
long time, such as there is malfunction on the hydraulic pressure system’s clamp
function, or limit switch SQ3 is adjusted improperly, which doesn’t make the
touch spot disconnect after clamping the arm.
Set thermal relay FR2 to avoid overload running of hydraulic pressure motor.
The value is set by according to the current on the name plate of motor M3.
9.3.5 Looseness or clamp of column and headstock can be done separately or
synchronously.
9.3.5.1 Synchronous looseness or Clamp of column and headstock.
Turn change-over switch SA to the middle position, at this time push the
loose button SB6, electromagnet YV1, YV2 attracts, AC contactor KM4 attracts,
motor M3 clockwise turn to make pressure oil enter loose oil cavity to drive
piston and rhombic block, which make column and headstock loosen.
9.3.5.2 Looseness or Clamp of column and headstock can be done separately
Turn change-over switch SA left, at this time push the loose button SB6,
electromagnet YV1, YV2 attracts separately, AC contactor KM4 attracts, motor
M3 clockwise turn to make pressure oil enter loose oil cavity to drive piston and
rhombic block, which make column and headstock loosen separately.
9.3.6 Start-up and Stop of Cooling pump
Power of cooling motor can be connected and disconnected by turning the
switch QS2.
9.3.7 Emergency stop and release
Push Emergency stop button SB1, the machine stops, turn the Emergency
stop button SB1 as the direction of arrow to reset.
Caution: Some of the electrical parts are still electriferous when pushing