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How to Tram a Mill Head

How to Tram a Mill Head. Why is tramming a mill head important?. Ensures Tool is ____________ to table surface in both the x and y directions. Ensures that milled surfaces are mutually _____________________.

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How to Tram a Mill Head

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  1. How to Tram a Mill Head

  2. Why is tramming a mill head important? • Ensures Tool is ____________ to table surface in • both the x and y directions. • Ensures that milled surfaces are mutually • _____________________. • Prevents __________________________pattern from forming on milled surfaces. Un-trammed Mill Head Trammed Mill Head

  3. Tools for Tramming a Mill • Dial Indicator (Fig. A) • Mill Wrench (Figure C) from the mill Figure A Dial Indicator for chuck Figure C Mill Wrench

  4. Tramming about the X-axis(Side View Tilt of Mill Head) • Process: • 1.1 Loosen the three clamping _________ as shown in Figure 1 • 1.2 To adjust the head, turn the _____________________on the top of the mill as shown in Figure 2 Figure 1 Clamp bolts on mill for Y-axis adjustment Figure 2 Adjusting bolt for X-axis tramming

  5. 1.3 Adjust the head to the _______ on the mill protractor as shown in Figure 3 by turning the adjusting bolt • 1.4 Attach the ___________ __________________to the chuck as shown in Figure 4 • 1.5 Raise _____________/______________ Chuck so that the indicator contacts the table surface • 1.6 Adjust the _______________/____________ height until the indicator is preloaded • with .005 - .010” of travel Figure 3 X-axis protractor on mill Figure 4 Dial indicator installed on chuck

  6. 1.7 Position the _________________ at the front of the table as shown in Figure 5 • 1.8 Zero the ____________ ________________by turning the dial • housing • 1.9 Rotate the ____________ so the indicator is at the back of the table • 1.10 Read the _________________ and determinewhich way the _________ needs to be moved • a. A negative reading (____________________) means the head must be tilted up • b. A positive reading (_____________________________) • means the head must be tilted down Figure 5 Indicator positioned at the front of the table

  7. 1.11 Adjust the head so the difference between • the __________ and _______________ ____________is no greater than • .003” • Adjust out ______ the difference between the two dial indicator measurements at a time • 1.12 Tighten the ___________________ bolts • 1.13 Recheck the front and rear measurements to • make sure the head did not move when • tightening the _________________ • _________.

  8. Tramming about the Y-axis (Front View Tilt of Mill Head) • Process: • 2.1 Loosen the __________ clamping bolts as shown in Figure 1a • 2.2 To adjust the head, turn the ________________ bolt on the top of • the mill as shown in Figure 2a Figure 1a Clamp bolts on mill for Y-axis adjustment Figure 2a Adjusting bolt for Y-axis tramming

  9. 2.3 Adjust the head to the __________ on the mill _____________________ as shown • in Figure 3a by turning the adjusting bolt • 2.4 Attach the _________ ___________________to the chuck as shown in Figure 4a • 2.5 Raise Table/Lower Chuck so that the indicator contacts the _________ ______________. Figure 3a X-axis protractor on mill Figure 4 Dial indicator installed on chuck

  10. 2.6 Adjust the table/chuck height until the • indicator is preloaded with ___________” • of travel • 2.7 Position the indicator at the _________ side of • the table as shown in Figure 5a • 2.8 Zero the dial indicator by turning the ________ • housing • 2.9 Rotate the __________ so the indicator is at the • left side of the table • 2.10 Read the _________________and determine • which way the _________ needs to be moved • a. A negative reading (ccw needle • rotation) means the head must be • rotated __________. • b. A positive reading (cw needle rotation) • means the head must be rotated ______________. Figure 5a Indicator positioned at the front of the table

  11. 2.11 Adjust the head so the difference between • the front and rear readings is no greater than • _____________” • a. Adjust out _______ the difference between the two dial indicator measurements at a time • 2.12 Tighten the _________________ ________. • 2.13 Recheck the _________ and __________ • measurements to make sure the head did not move • when tightening the clamping bolts.

  12. Helpful Hints • Make small adjustments and always watch the indicator. • A good adjustment is ________ of what the dial indicator • reads. • This will prevent over adjusting the head. • Think about what is happening as the indicator is moving. • This will help determine which way the head needs to be moved • __________ needle motion indicates the table is getting lower, • or the angle between the mill head and that side of the table is • less than ______ degrees. • __________ needle motion indicates the table is getting higher, • or the angle between the mill head and that side of the table is • greater than ________ degrees.

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