FEC AFC3000, Hardware Operation Manual

Page: 189 / 294

Chapter 7 Fastening Instructions
PAGE 7-22
7-2-4 Operation After Fastening Data No. 006
•
1 Pulse Reverse
The spindle can be turned backwards after fastening without loosening up the bolt by using this
function. This helps to avoid the socket being jammed on the bolt after the fastening operation.
When this function is enabled, the motor turns backwards at 1 Pulse Reverse Speed
until it senses
the small amount of torque set at 1 Pulse Reverse Torque High Limit to ensure the socket is
loosened from the bolt head.
There is a 1 Pulse Reverse Time limit just in case the socket disengages from the bolt before
sensing 1 Pulse Reverse Torque High Limit.
Note: (The 1 pulse reverse function will be disabled if if “1 Pulse Reverse Time” is set to
“0.0”)
Normally, the socket needs to turn a few degrees before hitting the other side of the bolt due to
socket play. However, surface drive sockets may need more than 10 degrees of rotation.
It is recommended to set 1 Pulse Reverse Torque High Limit to less than 50% of the fastening
torque to ensure the bolt does not loosen. 1 Pulse Reverse Speed can be as slow as 1 rpm and 1
Pulse Reverse Time can be 0.25 ~ 0.5 Seconds.
Revolutions
Revolutions
•
Reduce Torque Reaction
The Reduce Torque Reaction function is used to avoid the mechanical / ergonomic shock at the end
of the fastening by gradually reducing the torque at the end of the fastening.
(This function will work for Reject stop or Emergency stop as well)
The time used during this torque reduction will be included in the cycle time result but will not be
included in 2
nd
time result nor 2
nd
time judgment.
Note: This function may cause A8-10 Overload Abnormals if the fastening torque is close to the full
scale torque of the tool.
Torque
Time
Standard Torque
1st Torque
1st Time
2nd Time 200 ms
Cycle Time
Torque
Speed
150ms
120: 1 Pulse
Reverse
Torque High
Limit
321: 1 Pulse Reverse
Time
08: 1 Pulse Reverse Speed