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Using <strong>Virtual</strong> <strong>Machine</strong> Models with CeRun and Gener<br />
Adding Parts, Fixtures and Stock to the Simulation<br />
have to be changed from one part to the next. The gouge tolerance is a modal value stored<br />
in the registry; it is not stored on a program-by-program basis in the verification setup<br />
(.vsw) file.<br />
The non-cutting portion of the tool, the tool holder, and all other collision-enabled components<br />
of the machine are also tested for collision with the part. The gouge tolerance is<br />
not applied when testing for part collision with these components.<br />
� Fixture: Individual components of a fixture can be identified as machinable or not, which<br />
affects how they are tested for collisions.<br />
A machinable component might be a “soft” clamp or plate that will be cut by the tool<br />
during the manufacturing process. With the Material Removal Simulation (MRS) license<br />
option enabled, VM can optionally compute the in-process state of machinable fixture<br />
components, treating them as though they were defined as stock objects (see stock definition<br />
below).<br />
If an MRS license is not available, or is not enabled for a machinable fixture component,<br />
then the cutting portion of the tool is not tested for collision with the fixture component if<br />
the tool is spinning and the cutting motion is at feed. The non-cutting portion of the tool,<br />
the tool holder, and all other collision-enabled components of the machine are always<br />
tested for collision with machinable fixture components.<br />
Non-machinable fixture components are always tested for collision against the entire tool,<br />
the tool holder and all other collision-enabled components of the machine.<br />
� Stock: With the Material Removal Simulation (MRS) license option enabled, VM can<br />
compute the in-process state of the raw stock. The path of the cutting portion of the tool<br />
will be “subtracted” from the stock during the manufacturing process in the same way<br />
that material is removed during real machining. Motions that cut the stock at rapid or<br />
while the spindle is stopped, will be diagnosed with an error. These cuts will also appear<br />
highlighted on the in-process stock object and identified as a collision in the Timeline<br />
display. Individual components of the stock can be enabled or disabled for MRS simulation<br />
using the component's Material Removal column setting.<br />
The “Associated Part” column in the Stock tab and companion “Associated Stock” column<br />
in the Part tab, are used to associate pairs of raw stock and finished parts to one another,<br />
so that they can later be compared using the Simulation»Compare (Ctrl Alt Q)<br />
function.<br />
If an MRS license is not available or not enabled, any object defined as stock is shown in<br />
the simulation window but ignored for collision testing purposes. To enable collision testing<br />
on a near-<strong>net</strong> stock shape, define it instead as machinable fixture. This will allow only<br />
the cutting portion of the tool to interfere with the stock, and only then when the motion<br />
is at feed and the spindle is turning.<br />
VM does not check for interference between part and fixture, so they can partially or completely<br />
overlap each other without problems.<br />
<strong>ICAM</strong> Technologies Corporation – Proprietary 19
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