CONTREX M-Traverse - Manual (Page 58)

3 - 11
CP-17 is the number of Follower encoder lines that the Feedback
Frequency input registers when the Follower travels one traverse
length. When you calculate this variable, be sure to consider all gear
reductions, belt reductions and other types of reducers. Use the
following procedure to check or find CP-17 :
• Place the M-Traverse in F-Stop.
• Activate the Home Set input (clears the Follower position to zero).
• Place the M-Traverse in F-Stop.
• Display MV-44 (Follower Position).
• Jog the Follower either one laypitch (CP-15) for level wind or one
traverse length( CP-15) for web scan.
• MV-44 should have the same value as CP-17.
PPR Follower (CP-18)
The PPR Follower (CP-18) parameter is the number of pulses per
revolution of the feedback encoder (encoder resolution in lines).
Maximum RPM Follower (CP-19)
The Maximum RPM Follower (CP-19) parameter is the RPM of the
feedback encoder shaft when the Follower is operating at maximum
speed. Although this entry does not need to be exact, highly inaccurate
entries will make it difficult to tune the M-Traverse for precision Follower
profiling. When you calculate this variable, be sure to consider all gear
reductions, belt reductions and other types of reducers.
The factory defaults for the Follower Scaling Control Parameters are found in Table 3-4.
To modify the default parameters refer to Table 3-5. If you are uncertain how to enter a
Control Parameter, review the
Operations: Keypad section.
Table 3-4 Default Follower Scaling Control Parameters
CP Parameter Name Parameter Value
CP-15 Engineering Units 0.000
CP-16 Lead PPR Reel 1000
CP-17 Follower Lines/E.U. 1000
CP-18 PPR Follower (Feedback) 60
CP-19 Max RPM Follower 2000