|
Back
|
Braid and Spiral Shield
|
|
| |
| Spiral Shield Algorithm Procedure |
| 1. |
Convert desired minimum % coverage into an F value by: |
 |
| 2. |
a) *Select an angle that you would like to be close to, calculate by: |
 |
| b) Now recalculate a using N from step 2a by: |
 |
| 3. |
a) Using new a from step 2b, estimate P by: |
 |
| b) Round Pick value from 3a up to next available pick increment for the carriers you used in step 2a. Now recalculate a by: |
 |
| 4. |
a) Re-calculate F by: |
 |
| b) Coverage is: |
 |
| 5. |
Calculate actual weight/M' of shield by: |
 | |
|
| Variable |
Definition |
| % |
Percent coverage |
| N |
Number of Strands (intergers from 1-13) |
| P |
Picks per inch |
| d |
Diameter of strand (inches) |
| a |
Angle of shield to axis of cable (degrees) |
| D |
Diameter under shield (inches) |
| C |
# of carriers (typically 4, 8, 12, 16, 24, 48) |
| p |
Pi (3.14159) |
| w |
Weight of strand, per M' (lbs/M') |
| W |
Weight of shield per M' (lbs/M') | *Note;Recommended angle range: - For D .020in. - .380in., use 20 degrees to 40 degrees. - For D larger than .380in., use 40 degrees to 80 degrees | |
|