There is a certain gap between the actual place speed of the SMT pick and place machine and the theoretical place speed given by the SMT pick and place machine manufacturer. We all know that the place speed of the SMT pick and place machine determines the production capacity of the SMT pick and place machine and the production line, which is an important limiting factor for the production capacity of the entire production line. So how is the actual placement speed of the SMT placement machine calculated? The actual placement speed should consider the following factors, SunzonTech share below information for your reference.
1. The place cycle of SMT pick and place machine
The place cycle is the most basic parameter that marks the place speed. It refers to the time it takes for the components to be picked up, inspected, placed on the PCB, and then returned to the pickup location. Each time such a trip is performed, a placement operation is completed, that is, a placement cycle is completed. Generally, the placement cycle of high-speed machine placement of Chip components is within 0.2 s, and the current highest placement cycle is 0. 06-0. 03 s; the placement cycle of generally widely used machine placement QFP is 1 ~ 2 s, The placement cycle for chip components is 0.3 ~ 0.6 s.
2. The place rate of SMT placement machine
The placement rate refers to the number of components placed in 1 hour, the unit is c/h. The placement rate is the placement speed measured by the placement machine manufacturer under ideal conditions. The calculation of the theoretical speed does not consider the PCB loading and unloading time, the placement distance is the closest, and only a small number of components (about 150 chip components) are attached, and then the time used to mount 1 component is calculated, and the 1 h placement is calculated based on this Quantity.
3. Auxiliary time on SMT patch production line
(1). PCB loading/unloading time, usually 5 ~ 10 s for the placement machine.
(2). The components on the large (rectangular) PCB are far apart and the mounting time will be extended.
(3). Refueling time.
(4). Machine maintenance time (days/weeks/months). This is where the advantages of good quality SMT placement machines have. Good quality SMT placement machines without failure can reduce machine maintenance time.
(5). Unpredictable downtime.
On conclusion, SunzonTech would say that the actual placement speed of a pick and place machine machine is much lower than the theoretical placement speed, usually about 65% -70% of the theoretical placement speed. This should be considered when purchasing the pick and place machine or calculating the production capacity of a pick and place machine machine.
SunzonTech is a manufacturer of PCB handling machine and customized production line in China. We are also your full SMT solution solver. Any help need please contact sales@sunzontech.com
