TOMATECH AUTOMATION
…… 004 …
Chapter 6 Memorizing Pitch Error
449
Ⅲ Connection
compensation amount by executing a negative movement 10.000mm from origin. So
there is an
offset point every -10.000. No.59 is a compensation amount at -10.000~-20.000mm.
Therefore the
point N is set by an offset of move from (N-61)×(offset interval) to (N-60)×(offset interval).
The following table content is resulted from the above:
Actually as the machine moves from point -30.000 to the point +10.000, the pitch error
offset is:
(-7)+(-7)+(+6)+(+4)=(-4)
③Data parameter No.098 (pitch error origin) =127, No.099 (offset interval) =10.000
When the pitch error origin is set to 255:
The offset value for the 1st segment is set by the position No.255 in the offset table, the
offset
value for the 2nd segment is set by the position No.254 in the offset table, and the offset
value for the
Nth segment is set by the position No.256-N in the offset table.
The machine zero is regarded as the reference point of pitch error origin, the system
compensates the compensate amount set by No.255 in the offset table from the machine
zero to the
negative direction. So the pitch error compensation can be executed when the machine
coordinates
are less than 0.
The position No.255 is an offset value from reference point to -10.000mm, No.254 value in
the
table is the one from -10.000mm to -20.000mm, so there is an offset point every -10.000.
Therefore
the point N is set by an offset of move from (N-256)×(offset interval) to (N-255)×(offset
interval).
Above is the example of the following offset interval error.
Machine
coordinate
system
Offset parameter
No.
Offset value
Drive unit current
code pulses before
compensating
Drive unit current
code pulses after
To Next Page
Loading...
Need help?
General