User Guide

onto the command line, then click on the SMD. Drag it with MOVE so
thatitislocatedatthecorrectposition.
The INFO command is helpful for checking the position and properties
ofthesolderpads.
When a SMD is placed (in the Top layer), symbols for solder stop and
solder cream are automatically created in layer 29, tStop, and layer 31,
tCream,respectively.
If the component in the layout is mirrored onto the bottom side, these
are changed to the layers with the corresponding functions, namely 30,
bStop and32, bCream.
SMDNames
If no names are visible in the SMD pads, click the Options/Set/Misc
menuandactivatethe Displaypadnames option.
Alternativelyyoucantypethefollowingontothecommandline:
setpad_nameson ←
All the names will be visible once the screen is redrawn (WINDOW
command).
Use the NAME command to adjust the names to match the specifica
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tionsofthedatasheet.
It is alternatively possible to assign names as the SMDs are being placed,
if the component has a large number of pads with sequential numbers.
Select the SMD command, type in the name of the first SMD, e.g. '1',
and place the pads in the correct sequence. The single quote marks must
be entered on the command line. See also the section on Names and
AutomaticNaming onpage 69.
You can also combine several statements on the command line, for
example:
smd0.82'1' ←
A SMD of 0.8 mm x 2.0 mm and with the name 1 is now attached to the
mousecursor.
DrawtheSilkScreen
First set the grid to a suitable value such as 0.254 mm (10 mil). Draw the
silk screen print in layer 21, tPlace. Note that it must not cover soldered
areas,asthiscancauseproblemswhentheboardscometobesoldered.
Do not use a line width below the minimum of 0.2 mm. The standard
valueis0.254mm(10mil).
It is also possible to create an additional, more detailed, silk screen for
documentation purposes in layer 51, tdocu. This may indeed cover sol
-
deredareas,sinceitisnotoutputalongwiththemanufacturingdata.
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ComponentDesignExplainedthroughExamples