The majority of operators will at some time or other wish to override the feedrate or spindle speed, whether proving out a new program, or perhaps trialing a new tool or cutting method and in most cases this involves the use of specific override buttons, or a separate rotary switch for the purpose.
The Haas control also provides these facilities using the multi function Jog Handle and two specific buttons – Hand Cntrl Feed and Hand Cntrl Spin, both of which are located in the Override Section of the keypad.
By pressing the Handle Control Feedrate key, the jog handle can be used to control feedrate from 0% to 999% in ±1% increments, with the feedrate in operation, as the button is pressed, being used as 100% mark. In this way, the operator can reduce the feedrate to 0% and thus the machine will be stationary, or conversely the override can be increased to 999% or approximately 10 times the programmed rate. Pressing the button again will disable the Jog Handle override and the feedrate will continue at the override rate shown on the screen. By pressing the Handle Control Spindle key, the jog handle can be used to control spindle speed in the same way.
Hand Cntrl Feed (Handle Control Feedrate) – Pressing this button allows the jog handle to be used to control the feedrate in ±1% increments.
Hand Cntrl Spin (Handle Control Spindle) – Pressing this button allows the jog handle to be used to control spindle speed in ±1% increments.