A single spindle coil winder is crucial for creating tight and evenly wound coils. It’s often used in the production of a wide range of electrical and electromagnetic devices.
These machines and parts are subject to malfunctions and breakdowns despite their importance. Fortunately, troubleshooting these issues is relatively simple.
1. Open Winding
A coil winder is a machine that produces electrical coils used in a wide range of devices and appliances. Coils are essential for the function of these devices, and they must be tight and evenly wound. A single spindle coil winder is a machine that can produce these coils quickly and accurately, saving time and money for the manufacturing company. However, some issues can arise when using a coil winder.
Open windings are a common problem with a single spindle coil winder. An open winding occurs when the wire is not properly seated on the bobbin, creating uneven or unconnected windings. This issue can lead to poor performance and failure of the device using the coils.
In order to check for an open winding, a multimeter can be used to test the motor with the coils disconnected from it. During the test, the resistance values of each set of windings should be recorded. The lowest reading should be below 10 ohms, while the highest reading should be three to five times higher than the lowest reading. If any of the readings are infinite or over range, this is a sign that there is an open winding in one of the windings.
To prevent this issue, the nozzle should be cleaned after each winding, and the wire positioned properly on the bobbin. The nozzle should also be placed so that it is not in contact with the previous winding. This will help to prevent mechanical tension from being created inside the wire.
Another issue that can affect the performance of a single spindle coil winder involves a problem with the separating point for the start and run windings. The separating point should be located close to the wire parking pin. This will ensure that the wire is not being pulled away from the pin, causing it to become loose and damaged. In addition, the separating point should be located far enough from the nozzle to avoid any mechanical tensions that the contact between the nozzle and the wire may cause.
2. Excessive Current Draw
Coils are essential components in a variety of devices used throughout the manufacturing industry. This includes things like electrical coils, resistors, heating elements, and motors. These coils must be tightly wound and evenly distributed to function properly. If they aren’t, the device may not work and could be dangerous.
A single spindle coil winder is an important tool for producing these kinds of coils. However, it can also cause issues if the coil isn’t properly tensioned. A coil that isn’t sufficiently tensioned can lead to a number of problems, including stretched wires and breakage. It can also result in tangled coils, which can be a major headache for production environments.
This issue can be caused by a number of factors, including the amount of current used to make the coil and the size of the coil. It’s important to have a single-spindle coil winder with built-in tension control to apply the proper amount of tension to the coil. This will prevent excessive current draw and other issues that could affect the performance of the coil.
RGA’s range of standard and custom single-spindle coil winders includes a wide variety of models to suit any application. The range of options is extensive from compact, easy-to-operate mini-winders to a high-performance dual-spindle model that can produce field, mush, and armature coils. The machines also feature a range of accessories, such as cutting heads and interlock/lock guards, to ensure operator safety and security.
3. Noisy Spindle
Spindles are a vital component of many industrial machines. They need to operate at high speeds and precision levels. If any part of the spindle fails, it can significantly impact overall machine performance. That is why it is important to examine any sign of a problem as soon as possible. This is especially true of the coil winding process, where problems can be very costly to the production line.
A noisy spindle is often a sign of damage or worn bearings, which can cause the shaft to vibrate when it is turned under power. This may result in a sound similar to whining, growling, screaming, chattering, skidding, clunking, or electrical sparking. The good news is that a drop of light machine oil, such as electric motor oil, can sometimes cure this issue.
The commutation currents in a motorized spindle can produce substantial acoustic noise during operation, which causes interference with other signals, such as temperature sensors and feedback loops. A snubber is designed to reduce this acoustic noise during spindle motor commutation by decreasing the resistance and increasing the capacitance of discharge paths between the windings. It also minimizes the effect of the start-up current ramp profile on commutation voltages.
Another common reason for a noisy spindle is worn contactors. They must be replaced when they corrode or are pitted. This will prevent them from flipping over during the shift cycle and causing contractor arcing.
If a spindle stops over the tool but doesn’t pick up the tool, check for proper air pressure in the machine and verify sensor logic. A faulty ‘Tool Open’ sensor can cause this.
In addition to the above issues, other potential problems include uneven load distribution on the rotor, faulty bearings, or out-of-tolerance profile size and taper. These issues can be hard to detect if they don’t happen regularly. This is why it is important to monitor the performance of the spindle and other components, such as the servo and ball screws, variable frequency drives, air-supply quality, and coolants. These all can significantly impact the health and performance of a motorized spindle.
4. Locked Spindle
A single spindle coil winder helps create the electrical coils used in various products and appliances. However, these machines can have issues that can seriously impact productivity. If your coil winder starts to show signs of trouble, it may be necessary to seek professional repair. Fortunately, there are several easy troubleshooting steps that you can take to help resolve these issues.
The first step is to verify that the machine has power. Ensure that the emergency stop button is not pressed and that the clockwise direction of the spindle control knob is turned to resume power. Once the machine is powered on, check that it is accepting programming instructions and counting turns when it is turned manually. Also, verify that the wire guides are locked in a vertical position and that the wire guide angle reads zero.
If the spindle is not locked after the counter reads a count of 0 turns, then there is likely a problem with the servo drive. This unit is the one that controls the motor parameters, and a high-speed overload event may have damaged it. Check the wiring and connections to the drive, as well as the contactors and junction box, for signs of damage. It is also a good idea to test each of the T1, T2, and T3 leads in both the high and low ranges.
The faulty part of the servo drive is typically the solid-state relay (SSR) board, and this can be replaced. It will eventually fail if the SSR board does not have gold plating. If the replacement SSR board fails, it must be replaced entirely.
Another possibility is that the sensor that senses the tool opening is not reading correctly. A number of different issues, such as the lack of proper air pressure at the spindle or incorrect sensor logic can cause this. Regardless of the cause, the solution is to look for other root causes and make corrections as needed. This includes ensuring that the ejection stroke of the spindle drawbar/clamp group set matches the specifications in the machine tool manual. It is also a good idea to verify that the pull studs are the correct type for the spindle.