SMT标准smema接口线路
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2013-05-23
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Interface Standard 1.2
1
SMEMA
Surface Mount Equtpment Manufacturers Association
SMEMA Mechanical Equipment Interface Standard
Introduction
The SMEMA machine interface standards were developed to facilitate the interface of equipment used in the
manufacture of surface-mounted printed circuit boards. This standard is for Mechanical interfaces.
Purpose
The purpose of this standard is to provide an equipment interface specification for single board transfer
manufacturing systems of surface-mounted printed circuit boards. This specification provides the minimum
requirement that conveyor-to-conveyor equipment must meet, and does not represent a complete specification for
the equipment's interface. Conformance to the standard may be achieved by the appropriate design of the
equipment or by providing special adaptors which enable the equipment to meet the standard.
Specifications
The mechanical specifications that follow are for single board transfer systems with conveyor transports. These
systems can be assembled next to each other without any interface hardware. The printed circuit board is assumed
to move from left to right in the diaVr2n, E that follow; however, the same standard applies for systems when the
board moves from right to left. An equipment manufacturer must clearly state the direction of board movement.
1.) Conveyor height Each machine must have the transport conveyor height adjustable from 37" to
38" from the floor to the bottom of the PC board.
2.) Conveyor width For equipment with an adjustable conveyor width, the front rail is fixed and the
rear rail is adjustable. The range of adjustment will vary with the equipment
manufacturer.
3.) Edge clearance The conveyor should require no more than 0. 187" of clear board space at the
side edges.
4.) Tooling pins Tooling pins should be on the front edge of the board (next to the fixed transport
rail). A recommended hole diameter is 0.156"
(+.003, -.000). Distance from the edge is 0.300" + .010".
5.) Maximum gap The maximum gap between the in-line machine track ends is .375".
6.) Lead-in The minimum lead-in on the track ends of the conveyor is .1 25".
资源评论
qq1232228662013-08-21感觉还不错，蛮实用用的 谢谢了，
oQiDianTianXia2014-09-25有用，只是写得不够详细，如果每一条 线的含义都注明了就更好了- feiyang1292013-08-26有用的，就是不清楚
