Chamfer,usually,we say "Chamfer" means golden fingers chamfer.The gold fingers are in the same straight line,there is no problem to do such chamfers. like below.

Our robot customer has a new design ,the Printed Circuit board in the design is round and it has a special shape to fit in the robot case. The chamfer is a circle and we must do it in the slots.

Components quality is the key important for any electronics devices.
We also had a lot of problems for the components purchased from non-Authorized Distributors before.In 2017, we had two projects rejected with the bad electronic components. MAX485ECSA is the big problem,it made us and our customer on a fire position. There are many many fake/used parts,MAX part is just one of them.

In 2019,we have improved our purchasing process, for the key components--chip,MCU or any other components which you required,we will buy from authorized distributors,eg,digikey,mouser,etc.

Here are some components we purchased from Mouser directly.Do not worry about our components quality now.We will follow your part number and get the original&new parts to assemble.

Our great country--The People's Republic of China has celebrated 70 years of Communist party rule and its rise to global superpower status with a military parade showcasing the country’s technology, and a promise from President Xi Jinping that “no force can shake the status of this great nation”.
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Wish our great motherland prosperity and prosperity.