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4. Electrical system
4.1 Brief description
The machine with foreign advanced single chip and superior quality electric element is controlled by
electric system, the software system not only realize all kinds movement control ,but also has many
protective function with catenation, the capability of this system is very good ,and the movement of this
system is jarless and reliable. the move and stop of the main motor function are used by electric circuitry,
and it improved the accuracy of machine's drilling.
4.2 Explanation of the circuit
When using the machine, breaker QF1,QF2,QF3 which positioned electric box B1( drawing 4) must be
closed, it can be opened when examined and repaired. The three breakers separately protect short circuit、
over loading and short phase of spindle motor, pump motor and lifting motor. when close the chief switch
QS1, the system is entering working state and the single lamp HL1 light up ,when break the chief electric
source, the lamp crush out and working stopped.
4.3
Tapping operation:
Electric Element for the tapping control mainly contactors KM1 and KM2, selection switch SX1 and limit
switches SQ2 and SQ3 for tapping depth control. Put the selection switch SX1 into the "1"("0"is for hole
drilling only),arrange the spindle revolution in clockwise direction KM1 engaged), put the spindle manual
operation lever in down position until touches work piece, tapping job noe is starting. When required depth
is reached , the limit switch SQ3 works, the spindle immediately runs in counter clockwise direction (KM2
engaged), the tap returns out of the work piece, when spindle returns to the up highest position ,the limit
switch SQ2 works, spindle runs in clockwise direction, now one tapping job is finished. If tapping stop is
required, push the button (SB4) on the lever end , the spindle motor will immediately run in count
clockwise direction, that's all.
If the selection switch SX1 is in the "0"position, normal drilling work starts.
Attention: As the spindle motor works frequently during tapping, the motor will be hot quickly ,so the
tapping job could not be down for a long time, eight times of tapping per minutes maximum
is recommended as the motor needs cool when it is hot otherwise it will be burned.
4.4
Auto feed operation:
When auto feed , moving spindle down 5-6mm, press a push button at the end of either one of the three
levers, now feed clutch is engaged and indicator HL2 on the panel is lighted auto feed job is started.
When required drilling depth is reached ,the limited switch will be pressed, then spindle returns
automatically. Press the push button of the lever once again, auto feed will be stopped and the spindle will
return back to the original place.
Operation Manual
Total
26
page
11
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