The first factor may be that the automated strip cutter itself is not good, and the product produced by the machine has a large error.
The second factor may be that the pressure on both sides of the roller is not well adjusted, causing uneven pressure on both sides.
The third possibility is that the cutter die and other accessories of the automated strip cutter have not been installed and fixed. It is recommended to ask where you bought the machine. Generally, the warranty is free for one year.
By the way, I recommend a better automated velcro tape cutter: it can cut round belts, flat belts, elastic belts, and lifting belts.
In the process of use, it is best to use No. 45 engine oil for daily work. If not, you can use car lubricants to reduce mechanical friction and increase service life