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C-AXIS RUNOUT

Install the test bar.

With indicator in place as shown, rotate the C axis through one complete rotation to measure the concentricity of the test bar.

NOTE:  Indicator Step Up may very due to Table option

• Concentricity is not NTE .0015" TIR 

Spindle Centerline and B-Axis Intersection

C-axis Home

B-axis to 90º

Insert the test bar into the spindle

Find the high spot on the under side of the test bar 4" out from the spindle nose by jogging the Y axis forward and back,

Set your indicator to zero

Jog the X axis along the test bar [1] 4.75" out from the zero position. 

Sweep across the test bar in the X; your results should be zero-to-zero

• NTE .0005"

Rotate the B axis so it is in the position shown in figure 2. 

C axis at Home.

B axis at -90 degrees.

Be sure Z axis is high enough so when rotating B the test bar does not contact the table.

Jog the X axis over so the indicator is as shown in figure 2. Do not change the Y or Z axis position. 

Without changing the indicator zero, jog the X axis [2] 4.75" document the error.

• NTE 0.002"

B-AXIS SWEEP

Rotate b-axis to 90°. Measure 4" away from spindle nose. Mark the point on the test bar with a felt tip marker and place your indicator and set it to zero at the marked point. 

Rotate 45° to position [2]. Without moving the indicator jog the x and z axis to the marked point on the test bar in position [2] make sure there is no movement in the y- axis.

Repeat for positions [3], [4], & [5].note: all positions are in 45° increments.

From position [5] rotate the c-axis 180° and repeat steps 1-4. Use the table found at the end of the EA0421 (GM-2-5AX Inspection Report) to find the b-axis sweep error.

The tolerance is not to exceed the difference divided by 2 at each location.

B AXIS INCLINATION

Correct for error in the "C-AXIS at Home Position" by following the instruction bellow:

• Adjust by hand jogging the B axis to eliminate the error. 
• For NGC Controls go to Settings>Rotary Tab as shown.
  
• Highlight the GM B-Axis Rotary in the Select New Rotaries Table.
• Press [ALTER] to change the B-Axis Tool Change offset or go to Parameter 6.078 to set B-axis perpendicular to X-Axis
• Jog the ram up away from the granite and zero return the B-axis
• Jog the ram back down to the granite and verify inclination.
• Perform additional adjustment to Parameter 6.078 if needed.

           NTE: 0005"

B AXIS INCLINATION

 Maybe necessary to change the  spring washers paired with the B-Axis mounting bolts with 5 of the appropriate hard spacer. Contact HAAS Service Department for Spacers. Remember to use longer bolts (50 mm in lentgh) as the spacers are 5 mm in thickness. 

Correct for error in the "C-AXIS at 90 Degrees" by following the instruction bellow:

• Rotate the B-Axis to 90°. Support the 5 axis head using a fixture. 
• Remove the 7 plugs in the B-Axis body
• Loosen the 8 concentricity set screws. (keep very light tension on set screws to hold concentricity)
• Carefully remove five of the seven B-Axis Casting mounting bolts. 
• Do not fully remove the 2 bolts shown in red, bolt may be diffitcult to remove due to cable being int the way.
  
• Be careful not to damage any cables
• Slowly jog the Z-Axis up to separate the B-Axis body casting. 
•  Note: It is critical the B-axis body is stabily supported so mating surfaces remain parallel during separation
• Only separate enough to install mylar shim. 
• Install mylar shim
• Be sure to not block a bolt hole with the shim.  
• Tighten all [7] B-Axis Mounting Screws and check TIR is within machine specification. If not, repeat the process 

            Refer to HAAS FASTENER TORQUE SPECIFICATIONS.

• Once complete jog the  Z-zaxis back up,  zero-return the B and C-Axis and recheck steps 2 and 3 of the head verification process

C Axis Home Position

Correct for error in the "C-AXIS at Home " by following the instruction bellow:

• Before moveing onto the next step verify the C axis Home position. With B and C at Home , rotate the B axis to 90° find the highspot on the face of the test bar and sweep across the test bar.  
• Adjust by hand jogging the C axis to eliminate the error. 
• For NGC Controls go to Settings>Rotary Tab.
  
• Highlight the GM C-Axis Rotary in the Select New Rotaries Table.
• Press [ALTER] to change the C-Axis Tool Change offset or go to Parameter 7.078 to set C-axis perpendicular to X-Axis
• Jog the ram up away from the indicator and zero return the C-axis
• Jog the ram back down to the indicator and verify C axis Home postion.
• Perform additional adjustment to Parameter 7.078 if needed.

NTE: .0005"