Digital phasing technology of the cover machine (2)

In the control unit, the main chip of the controller used in this patent is MEAG l28, which is an 8-bit MCU. It is a new product launched in the domestic market last year. It is very powerful and 12 times the speed of an ordinary 8-bit MCU. s. The fastest production rhythm of the FMl450 coated machine paperboard composite is 120 sheets/min. The output pulse frequency of the controller design can reach the stepper motor to complete the corresponding adjustment within one production cycle period. When the cardboard misalignment is observed, the straight line to be adjusted is estimated. Displacement value L (unit: mm), press this key to input the target value L. At this moment, the second paperboard, which is the beginning of the timing, can receive the positive displacement, which means that the phase adjustment can be performed instantaneously in continuous production and the adjustment efficiency can be improved. , reduce waste films. At the same time, the high speed of the controller operation ensures that the stepper motor starts, runs, and stops within one production cycle, that is, the phase adjustment differential motion and the synchronous speed superposition are limited to the current one production cycle cycle. Once the adjustment is completed, The long-term energization of a phase winding, the stepper motor immediately outputs the self-locking torque to maintain the upper and lower channel chain in the long-term production synchronization, the same phase of the transport paper, bottom paper, until the transmission chain component manufacturing cycle accumulated to the need For phase adjustment, input the linear displacement value L that needs to be adjusted, and adjust the motor for controlled operation again.

A manual phase adjustment device (shown in Fig. 3) is installed on the paper conveyor frame of the existing model cover machine of the company. The key difference from this patent design scheme is that the axis of the wave generator in the harmonic gear differential mechanism is rotated. Manually, the locking of the wave generator shaft is also accomplished by manually screwing the locking screw. There is no numerical adjustment of the electronic control system to achieve a fast, numerically controlled phase adjustment of the face paper and the bottom paper.

In the cover machine models common in the existing market, during the use of the operator, the finished product is usually sampled at the end of the unit. After observing the misalignment of the board, the linear displacement value L that needs to be adjusted is estimated and then returned to the middle of the unit. Special tool, manually loosen the locking screw, shake the handwheel, and turn the wave generator shaft of the harmonic gear differential mechanism to form the differential between the upper and lower channel chain rows to achieve the paper conveying and the bottom paper conveying. Phase adjustment, tighten the locking screw to lock the adjustment hand wheel, and then to the end of the unit to sample the product, observe the change of the dislocation amount of the surface paper and the bottom paper. If the expected adjustment amount is not reached, return to the middle of the unit and manually unscrew it. Lock the screw and shake the handwheel. Usually it takes several iterations to reach the desired adjustment.

The FMl450 coated machine with digital phase adjustment system has the following advantages compared to the company's existing model cladding machine and the common cladding machine in the market:

1) The numerical phase adjustment system's execution unit and control unit are connected by cables. The execution unit is installed in the middle of the unit. The display and operation interface of the control unit can be set in the central control cabinet, or can be set at the finished product sampling point. The input adjustment value L is input, and the execution unit is controlled remotely, which is convenient for operation and improves the adjustment efficiency.

2) When the board misalignment is observed, and the linear displacement value L to be adjusted is estimated, the patent can input the target value to be adjusted by pressing the key, and the electric control system can accurately output the displacement in one step, and there will be no sampling during the visual adjustment process. The "overkill" phenomenon.

3) Since the stepper motor is used to adjust the motor, the patented controller design ensures that the second board that implements the adjustment can correct the misalignment, achieve the instantaneous effect in continuous production, and avoid the objectively "dragging" caused by repeated sampling, visual inspection and manual approach. , reduce "intermediate" and reduce scrap rate.

4) The digital phase adjustment system makes full use of the characteristics of step-by-step motors: â€œQuick starting, reversing and braking, and self-locking ability when one phase winding is energized for a long timeâ€. The harmonic gear differential mechanism can be locked out without manually screwing the locking screw.

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