Haas Parameter 620 X PLUS TRAVEL LIMIT

Haas Parameter 620 X PLUS TRAVEL LIMIT

Note that only Parameters 623 and 624 for the A and B axes are intended to be used, and only on Trunnion Mills (VF5TR and VF6TR) where it is necessary to place the home switch in the middle of the travel range (in order to keep the table flat when at the home position) and limit movement to +/-120 degrees. The Plus Travel Limit parameter is used to store the number of encoder steps a rotary can take in the plus direction from its current home position. The control takes into account these updated travel limits for jog and feed conditions. For example, if the steps/unit on the A-axis is 4000 and Plus Travel Limit is set to 20000, the control allows the A rotary to go up to +5 degrees before stopping (assuming that encoder scale factor is set to zero). The same applies for the B-axis. This feature enables the home switch to be moved to any desired location so a rotary can make proper orientation during zero return. Note that Parameter 591 and 592, AB Enc. Scale Factor is applicable in determining the limits. If this parameter is set to 3, in the above example the rotary will be allowed to go up to +15 degrees due to encoder scaling. Similar results will be achieved when the SCALE FACT/X bit is set to 1 (based on SCALE/X LO and SCALE/X HI bits = 0). To deactivate this feature on any axis, the Plus Travel Limit should be set to zero.