FEC AFC1500 - Manual (Page 113)

FEC AFC1500 Operations Manual Chapter 6: Fastening Instructions (Rev. 6: 10/09)
Page 6-27
6.6.5 Quarter Torque Recovery
When Quarter Torque recovery is enabled, torque is held at one quarter of the next Step torque value
until the next step is initiated. This can occur while spindles are awaiting synchronization with other
spindles, or during Sequence (MULTI unit) programmed Time Wait commands. Quarter Torque Re-
covery compensates for drastic torque relaxation during multiple spindle fastening and ensures that
sockets remain engaged on the fastener between steps. (See 6.5 for more information on Torque
Recovery)
6.6.6 Reduced Fastening Reaction
This function is mainly for manual or hand held applications where torque reaction during motor stop-
ping is too extreme for an operator to handle. The motor ramp down time is extended allowing a gra-
dual relief of the applied torque to the operator’s hands, thus reducing the affect and fatigue of direct
torque reaction.
See the AFC User Console software manual for additional set-up information.
6.6.7 VariSpeed
Varispeed automatically adjusts the fastening speed based on the type of joint that is being fastened.
This eliminates motor overload conditions typically on very soft joints (high rotational angle) and de-
creases system cycle time. When the system senses a decreasing torque rate (soft joint) prior to
reaching 1
st
Torque/Angle, the motor speed is automatically increased to an optimal speed for that
particular torque rate. When the system senses an increasing torque rate (hard joint) prior to reach-
ing 1
st
Torque/Angle, the motor speed is automatically decreased to an optimal speed for that particu-
lar torque rate. The speed is automatically controlled during the fastening process based on the tor-
que rate.
See the AFC User Console software manual for additional set-up information.
Torque
Angle/Time
Standard Torque
1 st Torque
Crossover Torque
1 st Time Final Time
¼ Torque
Recovery