| |
LOOP
LENGTH CHART
-
The chart shows a suggested loop
length ("L
") for various
stock thickness and amount of slack material
("S
") for various
feed line heights ("H").
-
The radius ("R") is normally
considered to be about 360 x strip material
thickness for mild steel to avoid distortion of
material in the free loop.
-
In the example shown, there are
four radii therefore: "L" = 4 X 360 x
material thickness.
-
Increasing the
"L"
dimension to more than required for your
material thickness is undesireable because it
decreases available
slack and increases the load on the
feeder.
-
If the loop control is an
"off-on" type, slack material should be about two
feed lengths.
-
If the loop control provides
variable speed depending on loop depth, slack can
be less, but will depend on factors such as strokes
per minute, feel length, etc.
|
Stock
Thickness
(Mild Steel)
|
Loop
Length
"L"
|
Stock Line Height (Depth of
Slack Loop) "H"
|
|
40"
|
42"
|
44"
|
46"
|
48"
|
50"
|
52"
|
54"
|
58"
|
62"
|
66"
|
72"
|
|
| GA. |
Decimal
|
Maximum Material Available in
Slack Loop
|
|
18
|
.047"
|
6 ft.
|
36"
|
39"
|
42"
|
45"
|
48"
|
51"
|
54"
|
58"
|
64"
|
71"
|
75"
|
81"
|
|
16
|
.059"
|
8 ft.
|
29"
|
32"
|
34"
|
37"
|
40"
|
42"
|
45"
|
48"
|
54"
|
61"
|
67"
|
75"
|
|
14
|
.074"
|
10 ft.
|
24"
|
26"
|
28"
|
31"
|
34"
|
36"
|
38"
|
41"
|
47"
|
52"
|
59"
|
67"
|
|
12
|
.104"
|
12 ft.
|
20"
|
22"
|
25"
|
27"
|
29"
|
31"
|
34"
|
36"
|
41"
|
46"
|
51"
|
60"
|
|
11
|
.119"
|
14 ft.
|
18"
|
20"
|
22"
|
23"
|
25"
|
27"
|
29"
|
32"
|
36"
|
41"
|
46"
|
53"
|
|
10
|
.134"
|
16 ft.
|
16"
|
17"
|
19"
|
21"
|
23"
|
24"
|
26"
|
29"
|
32"
|
36"
|
41"
|
48"
|
|
9
|
.149"
|
18 ft.
|
14"
|
16"
|
17"
|
19"
|
21"
|
22"
|
24"
|
26"
|
29"
|
33"
|
37"
|
44"
|
|
8
|
.164"
|
20 ft.
|
13"
|
14"
|
16"
|
17"
|
19"
|
20"
|
22"
|
23"
|
26"
|
30"
|
34"
|
40"
|
|
5
|
.209"
|
24 ft.
|
11"
|
12"
|
13"
|
14"
|
16"
|
17"
|
18"
|
19"
|
22"
|
25"
|
29"
|
34"
|
|
3
|
.239"
|
30 ft.
|
8"
|
9"
|
10"
|
11"
|
12"
|
13"
|
14"
|
15"
|
18"
|
19"
|
24"
|
27"
|
|
|
|
|
