Danfoss MCO 305 Design Manual page 95

MCO 305 Design Guide
CAM Index cards
The CAM-Editor index cards allow various parameters related to curve profiles to be changed. This is done
using the Curve Data and Curve Info index cards. In addition, other index cards allow all axis parameters to
be changed. These axis parameters will be downloaded to the controller along with the curve profiles when
the configuration file is downloaded. Please see Parameter Reference for a detailed description of the axis
parameters. The axis Synchronization parameters are of particular interest when working when with curve
profiles. These will be described below.
A detailed help description of any parameter in the index cards may be displayed by placing the text cursor
in the parameter field (e.g. by clicking on the field) and then pressing [F1].
Index card Curve Data
Name of Curve
If you edit several curves, you can give meaningful
names to the curves. Names may be up to 16
characters long and will be displayed in the "Array"
field in the CAM-Editor toolbar. These names are for
your own information; the controller does not use
them when working with curve profiles.
Type of Curve
Typically, curve profiles are cyclic; when the controller reaches the end of a curve profile, it will restart the
curve profile from the beginning again. As a result, it is extremely important that the gradients (i.e. velo-
city) of the curve profile matches at the start and end of the profile. This allows the slave motor to run
smoothly from the end of the profile back onto the start of the profile as the master cycles around the pro-
file. A discontinuity in the gradient would cause a hard velocity leap which could potentially damage the
motor or connected machinery.
The Type of curve allows the user to select how the CAM-Editor will match the start and end gradients. The
following curve types are available:
– Average start and end gradients – The actual slave velocity is not important at either the start or end
of the profile. The CAM-Editor will choose an average gradient simply to ensure smoothness.
– Set end gradient to start gradient – The actual slave velocity at the start of the profile is important
and should not be changed. The CAM-Editor will adjust only the end gradient so that it matches the
start gradient. The start gradient is not changed.
– Set both start and end gradient to 0 – The slave motor must be stopped when the master cycles. The
CAM-Editor will set both the start and end gradients to 0.
– Specify start and end gradients – The actual slave velocity is important at both the start and end of
the profile. The user must explicitly set the start and end velocities using the "Set" button. The CAM-
Editor will warn the user if the start and end gradients do not match but it is the user's responsibility to
ensure than any discontinuity does not cause problems.
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