8ft spindleless peeling machine using & maintenance

8ft spindleless peeling machine using & maintenance

8ft spindleless peeling machine using & maintenance

electrical part

1.First, we introduce a sensor that collects signals from the machine- encoder.

1.1

This is double roller encoder, fixed at one end of the double roll, which is responsible for tracking the speed of the rollers, calculating the linear speed.

So that we know the speed of the roller every moment of change, but also know the change of the speed of the log in the process.Then feedback to the program to control the speed of the feed.

Normally, during the working , The changes in the speed of the display are very small,Linear velocity is stable at a digit.And when the display's linear velocity fluctuates, it usually means that the encoder has problems.

The installation of double roller encoder is fixed with insulating plate and the insulated hose is used as the coupling ,to ensure that the encoder and the whole machine without electrical contact, avoid its signal interference.

During installation, the encoder must be kept with the center of the circle , connecting hose is not obviously skewed, then be fastened with the tie to avoid the tube sliding during the rotation to cause the measurement error. When changing the encoder, make sure to install it as well.

At the same time, our coding parameters are required, voltage 24vdc, 600 pulse, output A phase and B phase.

The encoder, in addition to the shielding layer, has four lines. White and black are power line, white is positive, black is com.Red and green are the A-phase and B-phase pulse signals.

When you change the encoder, you must ensure that the model is consistent. It is best to use the original encoder products.

1.2

Now we know another encoder, which is the feed encoder.（8ft spindleless peeling machine using & maintenance）

Its responsible for measuring the time position of the Knife platform ,to determine the diameter of the log of the current time,then program calculates the speed according to the required thickness.

Its installation also through insulation board and connection hose to ensure that there is no electrical interference Usually mounted on the end of the feed screw or gear.

We can know the operation of the encoder by changing the current tool position and the diameter of the log shown on the display. If the knife set fast forward and reverse the process of digital changes in normal, even reduce or increase. At the same time in the knife at rest, the number does not change, the encoder is generally no problem.

If this is not the case,Inspection and replacement encoder.

This feed encoder and double roller encoder are some differences

Except same four lines. feed encoder more than a yellow Z-phase pulse signal line so when you do not use this line, It can be used as double roller encoder

When you use this line, it is feed encoder.

If the encoder is damaged , replace the original encoder, or make sure the model is consistent.

1.3

For specific requirements of the model, the feed motor need to add an encoder.

Now let's know another encoder that is hidden inside the motor.

This encoder is at the end of the feed motor, which is responsible for tracking the motor speed, thus achieving the control system's closed-loop control and improved control precision. This will make the motor control more accurate at low frequency operation.

The installation of this encoder is the same as before, through the insulation plate fixed, connected through the connection hose. Ensure that the hose does not slip during rotation by means of a tie. At the same time as far as possible to ensure that the center of alignment, the hose is not skewed. To achieve the purpose of accurate tracking speed.

The encoder model and double roller encoder is the same, there are four lines.

Function and definition are the same.

If this encoder is broken, there will be peeling uneven and control abnormal Because the system did not get a correct response to the motor speed.

2.The following we introduce the another signal acquisition sensor, ---proximity switch

The position of the proximity switch is located at the position of the reducer of the hob motor. When the iron plate fixed on the sprocket rotates to the proximity switch position, the proximity switch senses the iron plate and the indicator light will light.

We need to make sure that the light is on and the roller cutter is located on the top of rubber roller, so as to ensure the normal operation of the hob. If this is not the case, we must first ensure that the knife can be cut to the rubber roller, keep dont moving, release the induction iron fixed screws, rotating the induction iron to the location of the switch to ensure that the lights just can light.

It should be noted that the working distance of the proximity switch is within 8mm. When the induction iron plate and the proximity switch are aligned, we usually adjust the distance between the induction iron plate and the proximity switch in the range of about 3-5 mm. When you replace the switch, you also need to ensure that the above requirements.

Our commonly used proximity switches are three-wire, where brown is positive, blue is negative, black is signal line. There are two models, one is PNP type, often open NO. The other is NPN type, often open NO. If replace pls be sure to model consistent.

In general, if the distance between the induction iron and the proximity switch is very close, the indicator light of the proximity switch is not lit, almost to determine that the proximity switch is damaged and needs to be replaced.

3.The folloing we know another switch, travel switch.

3.1

This is travel switch on the maximum opening position of the knife table , used to determine the maximum position of the knife table. When the knife back to the switch into effect, the knife will no longer back, change the switch from the limit and protection, while the knife at this time the location of the reset.

The location of this time when we pre-set the system in the machine where the maximum opening position.

When the first power or the diameter of the log is abnormal,The knife table needs to be automatically backed up to the position of the maximum stroke switch, Thereby resetting the exact maximum position of the turret. Calculate the position of the turret and the diameter of the log in the peeling process.

we can no longer touch the process of turning the trip switch, this will change the current position of the knife and the logs of the exact diameter of the interference system to normal operation.

Once you accidentally touch, you must wait five minutes after power failure, re-energize, so that the knife automatically back to the maximum stroke switch effective position, once the system to achieve the protection of diameter, the machine can not automatically back, you must manually retreat to the exact location.

This switch has two lines, we use the normally open contact. When you change, you need to keep in mind. And to ensure that the knife back to take effect.

3.2

This is the minimum opening position of the trip switch, used to prevent the collision occurred in the knife knife accident.

This switch does not work during normal operation. Once it is in effect, the tool holder will not be able to move in the direction of the opening small, thus protecting the knife and the double roller from crashing, causing the machine to be damaged.

The trip switch is only used as a second protection measure when data trip protection

fails.

This switch has two lines, we use the normally open contact. When you change, you need to keep in mind. And adjust the knife touch the screw, so that the minimum opening in the machine when the minimum limit switch switch to take effect.

4.Here we look at the numerical control box

4.1

This is two frequency converters. Large is responsible for driving the feed motor, responsible for peeling. Small is responsible for driving the hob motor, responsible for cutting.

The display will show the current voltage, frequency, and current, respectively. If the voltage is too low during the peeling process, such as the standard voltage of 380, only 320, the user's grid voltage is too low, will not achieve a good peeling effect, need to use the appropriate power supply voltage and power. If the current shown in the peeling process is too large, more than 1.5 times the rated operating current of the feed motor, it indicates that the current machine condition is not suitable. The sharpness of the knife, the height of the knife, the size of the knife, the height of the single roll there is a problem, need to adjust in time. The best condition is that the current in the peeling process is always stable near or below the rated current.

Sometimes we in order to achieve better control effect, the inverter will be some settings, these later video we will have involved.

4.2

This is the two servo drives, respectively, responsible for the left and right sides of the two servo motor. So as to adjust the dowel exactly when needed.

Two servomotors Depending on the mounting position, the steering required for both may be different and need to be set in the servo drive. To ensure that each side in the actual increase or decrease, and the program displayed on the display to increase the reduction of the state can correspond.

The factory will test machine and set the accuracy.

In the adjustment of the knife, there are two kinds of tone and monotonous. Later in the video we will explain in detail.

4.3 other Electric parts

This is a DC switching power supply that is responsible for providing the 24v DC power supply required by the electrical system.

A    is the circuit breaker, which is the total power switch of the control cabinet.B is the AC contactor, the electrical system through its control coil, turn on or off the corresponding motor power connection. Replace with the same model to replace.

C is an intermediate relay and is the control and execution of the electrical system.

D is a control transformer that is responsible for providing a reliable power supply to the DC switching power supply.

This is a unified terminal, divided into power lines and signal lines. This is the corresponding wiring table, which defines the different wiring names for each serial number terminal.

The green one is the Braking resistor. It will help the motor to stop quickly . Heat is produced during work.

At the top is the cooling fan. The thermistor is in series . When the temperature of the converter is too high, The fan automatically dissipates heat.

This is the external control box control buttons and display, shows the current machine is running parameters, but also responsible for setting the modified operating parameters.

The left side of the red button to the emergency stop the main switch, press the closed, this time can not operate the machine, the right-hand to open, you can operate and peeling. The right is the pause switch, when the press off, the machine can not be peeling, but can be in the case of emergency stop switch open handle fast forward and reverse, the right turn to open, if the emergency stop switch is turned on, Will start peeling work.

In addition there are hobs jog button, responsible for hob jog operation, easy debugging and

maintenance. As well as the operating handle, responsible for the machine knife fast forward and rewind operation. There is also a fault reset operation button, after the inverter alarm overhaul, the reset work. In addition, the two with the operation of the key knob, respectively, double adjustment and monotonous knife joints of the switch, to prevent misuse.

4.4 connect board

This is the wiring board, we need the external signal will be gathered here, including the two-roll encoder. Feeder encoder, proximity switch and front and rear stroke switches.

Some of the signal lines are connected directly to the patch panel. Some of the signal lines are connected to a unified terminal, and then the terminals are connected to the patch panel.

The output signal of the wiring board is given to the corresponding control part.

4.5 PLC

This is PLC. Responsible for the corresponding program operation and control, the above is the input part of the signal, there is input when the corresponding indicator light will light up. The following is the output part of the signal, there is output, the corresponding signal will light up, to facilitate us to determine the problem.

8ft spindleless peeling machine using & maintenance（8ft spindleless peeling machine using & maintenance）8ft spindleless peeling machine using & maintenance（8ft spindleless peeling machine using & maintenance）