Place some leveling jacks on the VR table then place a granite on those leveling jacks.

Once the granite is placed on the jacks adjust the surface of the granite flat. This is NTE 0.0001"

With the granite adjusted flat place the indicator on the front face of the granite [1]. Zero the indicator and run it across the granite, adjust the granite so that both ends read zero, 

Once the X-axis plane is zeroed place the indicator on one of the sides, parallel to the Y-axis plane. Zero the indicator on one end of the granite and run the indicator to the opposite end of the granite. Record the measurement. 

This measurement is NTE 0.0005/10" 

To adjust the Y-Axis perpendicular to X-Axis loosen the (3x) SHCS M12 X 50 [1] on the front of the saddle that connects the casting [2] to the linear pads. Be sure to loosen all 4 pads.

NOTE: There are (2x) SHCS M12 X 50 [3] found under the table that need to be loosen as well to make this adjustment. 

Once the bolts for all 4 linear pads are loosened, jog the saddle front to back a few times. 

Tighten and torque the 5 bolts back to specification using the HAAS TORQUE SPECIFICATION and re-check the X-Y perpendicularity.

WARNING: This step may be used as reference for the inspection report but do not make any adjustments before consulting with Haas Service. Adjustments made without consulting Haas Service will void warranty.

Place a cylinder on the granite and place an indicator on the top face of the granite [1]. Adjust the cylinder flatness so that the indicator reads zero in X/Y motion by shimming under the cylinder.

Place the indicator on the front face of the cylinder [2], zero the indicator, and jog the Z-axis up and down. This measurement is NTE 0.0005/10". 

Place the indicator on the side face of the cylinder [3], zero the indicator, and jog the Z-axis up and down. This measurement is NTE 0.0005/10". 

IMPORTANT: This step is for reference only.  The coloumn should not need to be adjusted, as the head geometry may influence this value. If any adjustments need to be made Haas service approval is  necessary. Adjustments made without consulting Haas Service will void warranty.

To adjust perpendicularity in either plane place shims on the highlighted portion of the riser block [1].

The shim amount should not exceed 0.008" thickness.

NOTE: Depending on how the machine was crashed the adjustment may need to start with the B-axis sweep adjustment. Make sure to consult with Haas Service for further information.

Place an indicator on the B-axis body and place the indicator on the face of the granite, set up the indicator so that it can sweep the granite with a 5" radius.

Zero the indicator and rotate the C-axis a full 360 degrees and record the measurement. This measurement is NTE 0.0008/10" diameter.

To adjust the C-Axis level loosen the bolts [1] that holds the black plate to the spindle head casting [2].

Loosen the bolts until the head drops enough to insert a shim in between. Do not exceed 0.003" shim thickness. Shim part numbers are:

• 59-0684 - .001"
• 59-0685 - .0015"
• 59-0686 - .002"
• 59-0688 - .003"

 Note: The shim amount usually follows a 1:1 ratio to correct the error.

 Note: The head does not need to be supported to do this. Only loosen the bolts enough to insert the shim.

WARNING: This step may be used as reference for the inspection report but do not make any adjustments before consulting with Haas Service. Adjustments made without consulting Haas Service will void warranty.

Home the B-axis and place an indicator on the test arbor. Find the high spot on the test bar by jogging the indicator along the X-axis.

Zero the indicator on the high spot and rotate the C- axis 360 degree's. Record the error, this measurement is NTE 0.0015" TIR.

Make a note of where the runout was the highest as this will be needed to make the adjustment

Remove the plugs that cover the bolts that hold the head to the casting. Loosen the bolts, but do not remove. 

NOTE: If these bolts are not loosened it will be difficult to adjust the concentricity 

Concentricity Adjustment:

For explanation purposes the largest point of error will be at C=90 degrees [1]. Rotate the C-axis body to 270 degrees [2].  Place 2 additional indicators [B] and [C] onto the B-axis casting as shown. 

Make sure the set screws are snug and not tight before proceeding with the concentricity adjustment.

In this example set screws denoted as [A] will be used to make the necessary adjustment. This is when the head has been roted 180 degrees from its original position [1]. If the set screws are tightened it will bring the spindle head towards the user.  Make these adjustments in small increments, this can be done by tightening set screws [A] by a half turn  and loosening the set screws on the opposite side by a half turn.

 WARNING:  It is important to monitor the adjacent set screws while adjusting. They should always be snug, but not tight. If they become tight loosen them up and continue adjusting. 

The indicators [B] and [C] are used to check movement along the X & Y axis. For example as you are tightening set screws [A] the spindle head may move in the direction of indicator [C]. Re-adjust the movement seen on that indicator back to zero and continue adjusting set screws [A]. 

WARNING: This step may be used as reference for the inspection report but do not make any adjustments before consulting with Haas Service. Adjustments made without consulting Haas Service will void warranty.

WARNING: Haas is requiring to change the spring washers paired with the B-axis mounting bolts with the appropriate hard spacers.  

 NOTE: When replacing the serrated/small steel washers order the service kit 93-3769 HSD C-AXIS MOUNTING HARDWARE SVC KIT for the proper hardened washers and longer bolts

When replacing the serrated/small washers with the hardened washers it is recommended to clean the counterbore seat, please refer to the H-5AX C-Axis Counterbore Touch Up - Instructions.

NOTE: Be sure to check the runout after torquing the bolts as the concentricity can change after torquing.

Home the B and C axis, place the indicator on the bottom of the test bar in the position shown in the top image.

Zero the indicator and rotate the test bar to position the indicator 180 degrees from its first location. Record this value, this measurement is NTE 0.0005" while the C-axis is in the home position.

Rotate the C-axis 90 degrees and the indicator in position shown in the bottom image. Zero the indicator and rotate the test bar to position the indicator 180 degrees from its first location. Record this value, this measurement is NTE 0.002" while the C-axis is in the 90 degree position.

NOTE: If the recorded measurement is out while C is in the home position (top image) adjust the B-axis tool change offset to bring it into specification. This may bring the measurements taken at C=0 and C=90 back within specification. 

To adjust the B-axis tool change offset home the B & C axis and place the indicator on the side face of the test arbor.

Find the high spot on the arbor by jogging the Y axis. Once the indicator is on the high spot jog the indicator up and down the test bar and adjust the B-axis so that the error on the indicator is no more than 0.0001".

Use the following instructions to change the Tool Change Offset if a service key is not available. 

Press [SETTING] and navigate to the rotary tab. Highlight the 4th axis selection[1] and press [ALTER] to set the TC offset [3].

After adjusting the offset go back and redo the inclination test, if the inclination is out of tolerance after adjusting the offset then proceed to the adjustment portion. 

If a service key is available press [DIAGNOSTIC] and navigate to the parameters tab and to the factory tab. Find Parameter 6.078 B-AXIS TOOL CHANGE OFFSET to set the tool change offset by pressing the axis letter + [F2] to set the offset to the current position.

After adjusting the offset go back and redo the inclination test, if the inclination is out of tolerance after adjusting the offset then proceed to the adjustment portion. 

Before shimming it is important to loosen all the set screws that are used to adjust concentricity.

Drop the head and support the spindle [1] and the B-axis casting [2].

Remove the plugs and remove the bolts that hold the head to the casting [3].

NOTE: Do not fully remove the two bolts shown in the bottom left, the cabling is tightly wound around those bolts and the bolts can get lost in the head and casting. 

Jog the Z-axis to separate the head enough to shim the head [4].

Place a mylar shim in the area shown in the image. Make a note of where the shims were placed. 

Re-bolt the head together, torque the bolts to 35 ft-lbs.

Snug the concentricity bolts back into place and redo the head alignment portion of this procedure up to this point to make sure everything is within tolerance after this adjustment. 

WARNING: This step may be used as reference for the inspection report but do not make any adjustments before consulting with Haas Service. Adjustments made without consulting Haas Service will void warranty.

After placing the mylar shims and redoing the previous alignment procedures up to this point verify the C-axis tool change offset is correct.

Home the B and C axis and swing B to 90 degrees. Place an indicator on the front face of the arbor and find the high spot by jogging in the Z-axis direction. Once found jog along the X-axis direction making sure this reading does not exceed 0.0001". If it does adjust the C-axis until it is within tolerance. 

Use the following instructions to change the Tool Change Offset if a service key is not available. 

Press [SETTING] and navigate to the rotary tab. Highlight the 5th axis selection[1] and press [ALTER] to set the TC offset [3].

If a service key is available press [DIAGNOSTIC] and navigate to the parameters tab and to the factory tab. Find Parameter 7.078 C-AXIS TOOL CHANGE OFFSET to set the tool change offset by pressing the axis letter + [F2] to set the offset to the current position.

Home the B & C axis and rotate B to 90 degrees.

Place an indicator on the bottom face of the test bar 4" away from the spindle nose.

In this position zero the indicator and move the X-axis 4.75" out from the zero position and make sure the test bar reads 0 to 0 across it [1]. This is NTE 0.0005". While in this position, go to the position page and zero the Z & Y-axis on the operators page. 

Rotate the B-axis to the -90 degree position (in reference to the machine position). 

Jog the X-axis so the indicator is on the bottom of the test bar make sure to bring back the Z and Y axis to its zero position on the operators page

. Jog the X-axis across and make sure the test bar reads the same value across it [2].  Subtract the difference between this value [2] and the previous value [1] and divide that by two. This measurement is NTE 0.002". 

With the C-axis in the home position and rotate the B-axis to -90 degree. 

Place the indicator on the front face of the test bar about 4" away from the spindle nose and mark the position of the indicator on the test bar with a felt tip marker, and set the indicator to zero. 

Rotate the B-axis to -45 degree position [2] and without moving the table in the Y-axis jog the indicator back onto the felt tip mark. Record this value. 

Continue this process for all other positions [3], [4], & [5] and record their measurements from the indicator.

NOTE: All positions are in 45 degree increments.

After taking the last reading at C = 0 and B = +90 rotate the C-Axis to C = +180 so that the test bar is back to its starting position.

Take the measurement at the operator X-Axis zero position, rotate the test bar so that the marked position is showing. 

Sweep the test bar in the X-direction to make sure it is still straight. If it is not, adjust the C-Axis until the error on the test bar reads the same end to end. Record this value. DO NOT SET THE INDICATOR BACK TO ZERO. 

Redo the sweep steps mentioned above and record the values. The difference between the measurements in run 1 and run 2 at each B-Axis position divided by 2, is NTE 0.004" (Run 1 is at C = 0, Run 2 is at C = 180; use inspection report EA0426 to help calculate).

 Note: If the indicator does not touch the test bar after it is rotated to C = 180 and does not touch sweeping in X, this might be due to the C-Axis Runout error, front to back direction. The C-Axis Runout section will need to be repeated and any errors corrected. 

If the B-axis position error and B-axis sweep come out of tolerance, check to see if the pins [5] have broken or the B-axis plate [6] has been deformed. 

To check these components rotate the B-axis to 90 degrees and lower the Z-axis close to the table. Place a support for the spindle cartridge [1] and B-axis casting [2] and lower the spindle head SLOWLY. Once supported break the mounting bolts [3] to remove the clamps [4] holding the spindle housing in place. Inspect the pins and plate.  

If the pins and plate are not damaged and B-axis position and B-axis sweep are out of tolerance contact Haas Service for assistance.

Note: For illustration purposes the spindle is removed in the third image, the spindle cannot be removed because the spindle cables run through the center of the spindle housing. 

Note: When reinstalling spindle, cables may cause the spindle to not sit flat against the mount plate. If this happens, separate the spindle from the casting and adjust the cables until the spindle sits flat. If the spindle still will not sit flat contact Haas Service.