A What is the warranty period for your equipment? After the warranty period, how do you guarantee?
The equipment warranties period is one year. During the warranty period, repairs and possible parts and component changes are free.
 
What does your warranty cover?
The warranty covers defects in machines. It does not cover damages issues caused by damage due to handling, shipment, storage, accident, impact, abuse, or misuse.
After the warranty period, customer can choose our warranty extension services or call for chargeable technical services.  

A Does your equipment emit excessive radiation? What methods do you use to ensure radiation safety?
 
For the Safety Radiation, the Chinese and international standards are both <1uSn / h. but the Radiation from our equipment is much smaller than this standard.  
 
Our radiation control methods are:
1. Sheet metal factory test;
2. Radiation Test before debugging;
3. Radiation Test after debugging.

A ● Pre-installation services including free installation instructions with the online video tutorials
● Warranty services
● Online support via call or chat at your own convenience
● User training
● Creation of customer profiles including personal details, product purchase date, product receipt date, and customer feedback. This service provides a timely one-stop service to solve all the customer’s worries.
 
Hope you have found this detailed blog post more informative that helps you to understand all the focus areas in detail before investing in industrial X-ray inspection equipment.

A We have the right combination of the technical knowledge with qualified service expertise to provide proper maintenance service on our every X-ray system. If you have any query about our products or services, you can immediately contact us via online chat, phone, or email, so that our professional team will solve them at once.
 
1. Professional Service Team
Unicomp has a team of well-experienced engineers to provide timely services for every customer, including consulting services, custom design, equipment qualification, safety inspection service, and so on.

2. Training & Maintenance Services
Unicomp offers an exceptional range of after-sales services, such as online video instructions and installation guides for our customers to ensure that their new or existing equipment is in safe and good operating mode, with a long life cycle. Additionally, we provide prompt safety inspection with regular maintenance service as per the personalized needs of our customers. These services are also available for X-ray machines delivered by other suppliers.
 
3. Customized Services
Once when you share the application details to our team, we will recommend the best X-ray inspection solution for you. At times, a customized solution will be the best, where we’ll work with you to suggest the right X-ray machine that will meet all your requirements. Hence, you can contact our sales and support team to discuss our services at any time as per your convenience.

A The following parameters should be taken into consideration while choosing the right PCB X-ray machine.
 
1. Image Quality
If you are planning to buy a good camera, obviously the one with a higher pixel rate, say 24MP (megapixel), is better than the one with say 15MP, right? If this is the case for photography, choosing the best qualitative X-ray machine can be even more complicated. A lot of physics along with clever software is involved. The factors that can affect image quality in the PCB X-ray machine may include voltage, power, spot size, the field of view, the proximity of the X-ray source to the target object, as well as the detector resolution. Consider voltage as an example; a higher voltage (say 160kV) system will have greater X-ray penetration ability, compared to the lower voltage one (say 130kV). The higher voltage can unfavorably affect the image contrast and henceforth the ‘quality’. In that case, how can you determine the quality? The best practical solution is to pick several typical sample assemblies and create the X-ray system. Determining the quality of an image can be a subjective opinion. The good news is that you can very well find the systems targeted at PCB assemblies that can deliver image quality ranging from very good to excellent. Perhaps, this is connected more with the inspection set up rather than the technical competence of its components.
 
2. How many ‘D’s?
The letter ‘D’ stands for dimensions. There are three kinds of dimensions:
● 2D (two-dimensional) to provide a straight top-down view
 
● 2.5D (2.5-dimensional) to allow top-down as well as oblique or tilted views
 
● 3D (three-dimensional) assembly re-construction using techniques computed tomography (CT), Remember the more details you view, the slower the examination is. That is why complex CT scans take hours to complete.
 
If you would like to check any missing solder balls or shorts between them, then 2D can be fine. Nevertheless, tilting will help in getting a better view if there are any components concealing the target area of interest. Hence, 3D will be used for an extensive detailed qualitative study of the target object.
 
3. Ease of use
Several X-ray systems allow a grade of automated inspection, like pass/fail’ criteria through programming sequences of inspections. This strategy helps to operate easily with repetitive inspection, thereby allowing an ‘in line’ process if needed. Hence you need relevant skills to set it up and perform ad-hoc inspections. Nowadays in the recent X-ray machines, it is easier to interpret the final images easily with the help of varied colors. Though modern X-ray systems are easy to use, the inspector, at times, need to understand the application of all the settings like voltage and contrast settings. Not only that, but the inspector should also be able to interpret the findings which require the knowledge of PCB assembly.
 
4. Maintenance
Remember that the Health & Safety Executive (HSE) must be notified in advance before using an X-ray machine. There will be obligations for creating instructions, procedures for use, and involving radiation protection supervisors with advisors. The machine suppliers should provide timely advice, and perform an annual qualitative check on the system.
 
It is a well-known fact that there are varied types of the X-ray tube. ‘Open tube’ types are comparatively quick, inexpensive, and easy to replace. Perhaps, you need to spend a few pounds and a couple of hours. But the tube should be replaced every 200-300 hours or so of use. In the case of ‘Closed tube’ types, they can last for many years. But they are relatively more expensive, where you will spend thousands of pounds. Hence the selection of the best one depends on how much you will be using the system.
 
Select the X-ray detectors with standard or High-Definition flat panels. The flow of X-rays leads to the degradation of detectors over time, say around 20% after ten years. Hence, it is recommended to replace every 8 to 12 years when the machine is in use.
 
Never forget to check for the common system failure modes, since the similar component parts can be assembled in varied ways. Remember to replace power supplies, cables, or connectors in time.

A The maintenance tips are categorized day-wise, monthly, bi-annually, and annually. Let us go through each of them in detail:
 
1 Daily check items
1.1. Check whether the safety induction switch found at the back door of the X-ray machine is working properly.
 
Method: Close both front and back doors to see whether the contact indicator of the relay is ignited. If the contact indicator light on the relays KA2(front door) and KA3(back door) is on, the safety induction switch is effective. If the indicator light is not on, the safety induction switch is considered as unacceptable.
 
1.2. Check whether the X-ray machine rotation axis and four-axis movement are working properly.
 
Method: Once when the total power is turned on, click on the software, and shake the joystick on the comfort to see whether the motion of X-axis and Y-axis is normal. Click both up and down buttons of the X-ray tube and the image detector on the software interface to check if the two axes are moving properly.
 
1.3. Verify if the motion axis of the X-ray machine sensors is working appropriately.
 
Method: This test is done to control the movement of each axis to the position of the equivalent limit sensor. When the indicator light of the sensor is switched on, the movement will halt. Check whether the computer is booting properly.
 
2 Monthly check items
 
2.1. Inspection of the X-ray machine movement mechanism
● Check whether the movement of each axis is normal and pay attention to the exact method of daily inspection items.
● Check whether the movement of each axis is smooth.
● Check whether the moving parts of the screw nut along with the work platform above the screw are not loose
● Check whether the X-axis and Y-axis of the screw is smooth. If there is any rust formation, apply grease in each of the screws. Check the movement after this lubrication.
 
2.2. Inspection of the emergency stop switch working condition
● Press the emergency stop button manually to check if the X-ray machine is down.
 
3 Biannual check items
3.1. X-ray machine power detection
Method: First, open the back door. Check whether 24VDC and 5VDC power supplies are working properly.
 
3.2. Equipment guide rail on the lubricating oil for its clean appearance
Method: First, turn off the device as well as disconnect the power supply. Open the back door, lubricate each screw rod with grease, and run it over and over to lubricate while cleaning the portions of the inner wall. In the end, open the side door and wipe it with a clean cloth.
 
4 Annual maintenance
4.1. Check for the signs of damage on the inner side and the outer side of the machine, if any.
4.2. Check the observation window glass to find if there is any scratch.
4.3. Check the rotation pattern of the X-ray light tube, platform movement axis, as well as the detector.
4.4. Check all the fans and clean the filter properly with cotton.
 
5 Check X-ray image quality

Description of the problem	Analysis of the problem	Solutions
The computer has a starting problem	· Loose computer power connectors · Presence of virus can cause a system failure	· Reinsert your computer’s power plug · Reinstall the entire system
Automatic reboot after power-up	Presence of the virus in the computer	Perform system restoration
X/Y/Z axis motors are not running properly	· Issues with the power supply to the drive · Loose B joints · Drive anomalies	· Replace the power supply · Use fasteners · Use replacement Drive
Jarring of the rail during the movement	· Loose couplings · Linear guide and roller screw without any lubrication for a longer duration due to dryness	· Check couplings and tighten them. · Lubricate the linear guides and roller screws using grease
Alarmed UPS	Inadequate power supply	Change the power supply

A ● The greater the focal size of the X-ray machine, the greater will be the geometric shadow of the object followed by the blurredness of the image.
 
● The smaller the focus, the smaller will be the geometric shadow of the object followed by the sharpness of the image.

A The major purpose of the X-ray inspection system is to detect the defects by localizing and magnifying objects. The greater the geometric magnification, the greater will be the ability to inspect the minute defects in a target object. For example, a 5µm defect with a geometric magnification of less than 1000X is not visible in the X-ray image. Geometric magnification is also called as optical magnification.
 
To understand the geometric shadows intuitively, follow the below steps:
● Place a finger in front of the projector
● View the shadow of that finger on the wall
● At the same time, you view an imaginary shadow next to a shadow. That’s called the geometric shadow.
● The finger image magnification is defined as the distance from the wall to the projector divided by the distance from the finger to the projector.
 
Calculation of the geometric magnification of a system:
Maximum geometrical magnification of the system = (maximum distance of the detector + maximum distance of the X-ray tube) / Minimum object distance (the nearest distance of the ray tube to the object i.e. FOD)
 
The minimum FOD will be the target heat sink thickness.