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24 Cards in this Set
- Front
- Back
What is the formula for angular misalignment? |
Back (Definition)
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What is an advantage cross dial has over rim and face alignment? |
End float has no effect on cross dial alignment because there are no face readings |
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Which dial is considered the king dial? |
The dial reading off the fixed machine (dial A) |
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How is dial bar sag applied in a cross dial alignment? |
Dial bar sag must be applied to both dials - dial A will have the DBS added to the 6:00 position -dial B will have the DBS subtracted from the 12:00 position |
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What are the steps to perform a cross dial alignment? (9) |
1) pre-alignment checks 2) rough alignment 3) bracket and dial indicator alignment 4) DBS 5) sweep readings 6) horizontal moves 7) vertical moves 8) misalignment calculations 9) repeat steps 6-8 until in spec |
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How accurate do the L1 and L2 measurements need to be? |
1/8th of an inch |
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What does the pre-alignment check consist of? (12) |
1) work permit 2) lockout 3) hazard assessment 4) foundation 5) hardware 6) base 7) pipe strain 8) soft foot 9) runout 10) end float 11) DBS 12) tool condition |
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Should soft foot be measured before or after the rough alignment? |
After, if the base isn't flat measurements will change when you move the machine |
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Why is a sweep reading done? |
A set of sweep readings ensures that the dials balance and that the cross dial set-up is correct |
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If the A dial is zero'd at the 12:00 position, where is the B dial zero'd? |
6:00 |
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Why should you start with a horizontal move instead of a vertical one? |
Aligning the equipment horizontally first allows for accurate vertical dial readings |
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Maximum offset misalignment is _____ inches per inch at _____rpm. |
+/- 0.002 inches per inch at 1800 rpm |
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Maximum angular misalignment is _____ inches per inch at _____ rpm |
+/- 0.0002 inches per inch at 1800 rpm |
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The _______ the distance of X the more accurate |
Bigger |
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What is the cross dial formula? |
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How are the dials mounted for a cross dial alignment? |
The cross dial method uses two dials mounted 180° across from each other on the rim |
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What does the X represent in the cross dial alignment equation? |
The distance between the dials |
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What can you do to help prevent your horizontal from moving when doing a vertical move? |
-Set your dials to the 3:00 and 9:00 positions and zero them Make sure the jacking bolts are just touching the side of MTBM |
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If you find that the dials move or creep away from the zero when torquing down the bolts what can you do? |
1) Check for soft foot 2) torque them down in a specific pattern and adjust for the movement |
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When graphing a cross dial reading, should the DBS be included in the A and B dials? |
Yes |
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On a cross dial graph, the ____scale should be twice that of the _____scale. |
Dial scale Shim scale |
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When graphing a cross dial reading, should the DBS be included in the A and B dials? |
Yes |
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Why should you adjust scales to use the largest area of the graph possible? |
It makes the graph more accurate |
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Card #24 |
Finished set |
