FEC AFC1200 - Manual (Page 2)

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6.1 Fastening Control Methods
The AFC1200 System is user programmable to select from three different fastening methods,
referred to as Torque Control, Angle Control, and Yield Control methods. Each method can
be configured to perform the fastening in 1 to 4 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 4 incremental step which will successively secure
the fastener to the specified torque values.
{ One-Step Fastening
P After presetting the Fastening sequence (SET SEQUENCE Section 7.5) to perform
a single step fastening, the System fastening parameters (PARAMETER SET
Section 7.1) 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 User Console Version A3.53
Page 6-2