FEC AFC1100 - Manual (Page 2)

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6.1 Fastening Control Methods
The AFC1100 System is user programmable to select from two different fastening methods,
referred to as Torque Control, and Angle Control methods. Each method can be configured
to perform the fastening in 1 to 2 incremental steps.
6.1.1 Torque Control Method
In Torque Control method, fastening is performed based upon attaining a desired torque
value. Fastening can be performed in 1 to 2 incremental step which will successively secure
the fastener to the specified torque values.
{ One-Step Fastening
P The System fastening parameters must be configured in accordance with the
Engineered fastening specification.
P One-step fastening will be used primarily for joints which have no requirement to
synchronize with another spindle during the final stage of the rundown.
Examples: Pipe plugs, single spindle applications.
P The System will fasten to the STD torque value during the specified 1ST STEP
time. Once SPEED CHANGE TORQUE is reached, the System will switch to the
specified TORQUE SPEED (Section 6.3).
STD.
TORQUE
1ST STEP
ANGLE
SPEED CHANGE
FIG. 6-1-1a Torque Control Functions for One-Step Fastening
Maximum allowable fastening cycle time 1ST STEP (TIME)
30 ~ 50% of STD for Hard joints
50 ~ 90% of STD for Soft joints SPEED CHANGE (TORQUE)
Engineered fastening specification STD
RECOMMENDATION FUNCTION
Chapter 6: Fastening Instructions (Rev. 8/98)
Page 6-2