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:
Torque Control, Angle Control and Yield Control. Each method can be used to perform
one-step fastening, or can be configured for up to four (4) steps.
6.1.1 Torque Control Method
When using Torque Control, fastening is performed based upon attaining a desired torque
value. Fastening can be completed in only one step, or up to four (4) incremental steps can
be programmed which will successively secure the fastener to the specified torque values.
w One-Step Fastening
P After presetting the fastening sequence (Section 7.5 Set Sequence) to perform a
single-step fastening, the System fastening parameters (Section 7.1 Parameter
Set) must be configured in accordance with the engineered fastening specification.
P One-step fastening is used primarily for applications which do not require
synchronization with another spindle during the final stage of the rundown (pipe
plugs and single-spindle applications, for example).
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
Page 6-2