Small diameter drill implement small aperture must consider when drilling into mechanical precision, but that the accuracy of the position of its main; position accuracy is generally known, including in terms of the following factors: a programming position and the actual table. Error on positioning accuracy. Recent new models also generally about ± 10 ~ 15μm error. 2. The error due to vibration caused by the spindle. (In particular, the error must be taken into operation) 3 PC instant drill bit deviation, the manual ring machine, large up to 10μm, its causes are complex; spindle, drill, clips, etc. are related. 4. The drill itself bending; drill the point-to-wear curvature that is bent accuracy between holes pass only. PCB drill drill drill control Type: PCB drilling straight shank twist drill head, fixed head and fixed shank twist handle spade (undercut) drill bit. Straight shank twist drill, most for a single head drilling, drilling a relatively simple single panel or PCB, is now rarely seen in the large circuit board manufacturing plant, which drilling depth of up to 10 times the drill diameter. In the laminated substrate is not high, the use of the drill bit holder to avoid bias. At present, most manufacturers use CNC drilling machine, CNC drilling using carbide drill bit set handle, which features can automatically replace the drill bit. High positioning accuracy, the ring plane, without the use of drilling sets. Large helix angle, chip speed, drill bits on the ring plane, suitable for high-speed cutting. In the entire length of the flute, it is an inverted cone drill bit diameter, drill hole wall when friction is small, high quality of drilling. Common shank diameter of 3.00mm and 3.175mm. Pneumatic ring machine, Acer Friends Lean Automation (certification), the ring plane provided by the Friends of the Shenzhen-Hong Lean Automation Limited. Friends Lean Automation Co., Ltd. Shenzhen-Hong (www.winsole.cn) (www.hy978.com) is an industry leader in Shenzhen, Guangdong, industrial automation control systems and equipment, over the years, the company implement the scientific management, innovation and development, the principle of honesty and trustworthiness , the maximum meet customer needs. Friends of Lean leadership macro automation with the staff warmly welcome all inquiries negotiations to create macros Friends Lean Automation better future.