ATB1200 User Guide Page 4 of 15
2.3
ELM205-ST HOUSING DESIGN
Reproduced below is an extract from the APS ELM205 Technical Reference (the drawing referred to
is included in this user guide as “Appendix 1 - ELM205-ST Dimension Drawing” on page 15):
Designing the Door
The function of the door is to bring the rubber roller to the chassis’ window entrance and to
make it follow the external path of the chassis’ window.
Given the shape of the chassis and the example in the mechanical drawing section (See
attached drawing), the cover is fairly easy to design.
In order to keep a good alignment, it is strongly advised to keep the rubber roller fully floating
inside the cover to compensate any tolerance problem inside the cover.
Moreover this play must be present in order to allow the rubber roller to follow the shape of
the chassis.
The Easy Door Opening System
Because the rubber roller is only referenced to the chassis and has no dependence on the
cover, the mechanism is very reliable. To achieve this reliability, the rubber roller must be
strongly locked inside the chassis.
To avoid any twist, and mechanical stress on the cover and more generally on the customer
plastic, so increasing the reliability and quality, APS developed a unique and patented feature
to ease the opening of the door, that makes the mechanism very easy to open, and does not
require any access to the cover’s sides, giving more flexibility and ergonomics to the
customer design.
This is achieved by clipping an internal lever inside the cover, that pushes symmetrically on
both sides of the mechanism. So the mechanism’s shape has been optimized to concentrate
the effort locally and always refer this effort to the chassis.
Doing so there is no need to have access to the cover side, giving more freedom to design
the cover, and allowing to reduce the width of the unit.
Please contact APS to obtain the application notes and for any assistance in designing the
lever.
For assistance in designing the enclosure, the door, or the opening lever for use with the ELM205-ST,
please contact Able Systems first. If necessary we will gladly refer any particularly complex
requirement through to APS.