HEIDENHAIN ND 2100G - Manual (Page 155)

ND 2100G GAGE-CHEK 155
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p Edge Type
The direction of the touch probe signal that will be recognized as a
valid probe contact is specified in the Edge Type field. Valid signals can
be RISING, FALLING or BOTH (rising and falling). The external edge
probe can also be DISABLED.
To specify Edge Type:
U Highlight the Edge Type field
U Press the soft key that specifies the edge type
U Press the ENTER key
Direction factor
The ND 2100G continuously monitors the direction of probe motion to
insure that probe tip compensation is applied to the correct side of the
probe. When the probe direction changes, a minimum number of
counts in the new direction must be accumulated to verify that the
direction change is valid.
Probe direction errors occur when probe tip compensation is applied
to the wrong side of the probe tip. The ND 2100G prevents probe
direction errors by monitoring the direction of probe movement and
applying compensation to the leading side of the probe tip center. The
ND 2100G then confirms probe direction changes by accumulating a
minimum number of counts in the new direction before changing
probe tip compensation. This minimum number of counts creates a
zone around the tip referred to as the direction factor, and can be
changed to accommodate different CNC hardware and application
requirements.
Probe direction errors are usually caused by mechanical vibration or
incorrect probing technique. The direction factor can be adjusted to
minimize or eliminate both types of error.
Probe vibration
Direction errors are generated when the direction factor is smaller
than the number of counts generated by mechanical vibration. Set the
direction factor to a count value higher than probe vibration to
eliminate errors due to typical probe vibration.
Direction factor lower than
vibration causes errors. Direction factor higher than
vibration eliminates errors.