Service Home How To Procedures H-5AX - Double Yoke Spindle Head - Upgrade – AD0784
Last updated: 04/25/2025

H-5AX - Double Yoke Spindle Head - Upgrade

AD0784

Revision B - 04/2025

Introduction

This procedure shows how to upgrade a Single Yoke Head to a Double Yoke Head and applies to the following Service Kits:

  • 93-4570 SPINDLE HEAD ASSY UPGRADE HAAS 5AX VR

Machine Requirements:

  • 100.24.000.1101 is the minimum software required

Tools Required:

  • T-0142 Spindle Encoder Jumper
  • T-0202 SHIPPING KIT DOUBLE YOKE VR

 Note: Send T-0202 sales order to Haas Service once ordered. 

 Note: For machines built before 4/18/2022 the following service kit needs to be ordered:

  • 93-3502 AIR REGULATOR SVC KIT HSD 5AX HD HSK A63 

Single Yoke Spindle Head Removal

1

Remove the spindle head cover.

Home the B-Axis and C-Axis.

Remove the 4 mounting bolts [1] on the right side of the head.

Note: Rotate the C-Axis to access bolts if needed.

Rotate the C-Axis to C = +90.

2

Place a piece of cardboard on the VR table to avoid damaging the table during the removal/installation process.

Place the VR head shipping bracket on the empty side of the table on the machine, lower the spindle head onto the bracket. You will lower the spindle head until the spindle head is fully supported. 

3

With the spindle fully supported use the hardware provided to mount the spindle head to the bracket.

4

With the spindle fully supported and mounted to the bracket remove the mounting bolts that attach the spindle to the spindle head casting.

Separate the spindle from the spindle head casting by raising the Z-axis, make sure the casting clears both servo motors on the replacement spindle and current spindle. 

5

While the machine is powered off disconnect the encoder cable [1] and install T-0142 Spindle Jumper [2] on the NGC Main PCB (P6).

Turn the machine back on and change the factory setting 4.004 Spindle Disabled from False to True.

6

Use a service key to set parameter 76 Low Air Pressure Alarm Delay to 999999.

7

Use a service key to uncheck the 4th and 5th axis on the Rotary tab in Settings.

8

Power off the machine and turn off main circuit breaker.

 Important: Take a picture and mark the lines on the machine side so that when the new lines are installed, matching the correct lines is easier.

Remove the lines from the spindle head manifold located inside the spindle head enclosure.

Disconnect all the barrel connectors and disconnect 33-0639 from the T connector.

9

With all the wires and hoses disconnected use a forklift to move the single yoke spindle head out of the machine and place the double yoke spindle head into position. 

Note: Approximate weight of H-5AX Head Assembly:

H-5AX HEAD HSK A63 20K = 397 lbs. (180 kg)

DOUBLE YOKE H-5AX HEAD HSK A63 20k = 450 lbs. (204 kg)

10

Remove the cable cover sheet metal.

Remove the B-axis and C-axis encoder cables from the Maincon (P4 and P5).

Save the Ferrite Filters from the two encoder cables.

Unplug the B-axis and C-axis limit switches from the HSD board (P4 and P5).

11

 Note: Label both ends of one of the encoder cables in the kit (32-1283) for the B-Axis and the other encoder cable (32-1283) for the C-Axis.

Route the B-axis encoder cable (32-1283) that came in the kit. Plug it into P4 on the Maincon. Attach the one of the saved ferrite filters to the cable.

Route the C-axis encoder cable (32-1283) that came in the kit. Plug it into P5 on the Maincon. Attach the one of the saved ferrite filters to the cable.

Route the B-axis rotary scale cable (32-10071) that came in the kit. Plug it into 12A on the Maincon. Attach the larger ferrite filter (64-1254) from the kit to the cable.

Route the C-axis rotary scale cable (32-1164A) that came in the kit. Plug it into 13 on the Maincon. Attach the remaining ferrite filter from the kit to the cable. 

12

 Important: Take a picture and mark the lines on the machine side so that when the new lines are installed, matching the correct lines is easier.

Unplug all the remaining hoses from the spindle head manifold located inside the spindle head enclosure.

Once the hoses are disconnected. Remove the two manifolds from the spindle head.  

13

Remove the coolant split hose. 

Double Yoke Install

1

Clean and stone the spindle head mating surfaces.  

Make sure the boss on the Double Yoke spindle casting is facing the right side of the machine, and that the servo motor is oriented towards the front of the spindle head casting or else the homing sequence may pose a problem later down the line if it is not. 

Power on the machine.

2

Correct any alarms present and jog the spindle head casting down toward the new spindle. 

 Note: Setting 53 jog without zero return will need to be turned on to do so. DO NOT ZERO RETURN THE SPINDLE HEAD.

Carefully jog the Z-Axis down making sure the spindle is straight to avoid wedging the spindle [1] into the spindle head bore.

Bolt the plate to the casting, using the 12 HHB 5/16 X 1.25 bolts in the kit.

 Note: Replace mounting bolts if damaged.

Jog the Z-Axis to the top of travel removing the Double Yoke Head from of the bracket.

Remove the bracket from the table. 

3

Power off the machine and turn off the main breaker.

Connect all the hoses and cables [1]. Neatly organize the hose and wires. 

Install the corrugated tubing on the cables [2] and the cable bracket [3]. 

4

Connect the hoses from the spindle head to the hoses from the CALM Cabinet using the table below.

The Polyethylene (PE) hoses from the spindle head [1, 2, 8, 9] will have push-to-connect fittings.

The Polyurethane (PU) hoses from the spindle head [3, 4, 5, 6, 7] will have compression fittings.

 Note: The TRP hose [7] connects to the 3/8 black hose with the 3/8F NPT 1/4M compression fitting [10].

 

  Head Hose Color     Head Hose Material Zip tie      CALM Hose Color      CALM Hose Material       Zip tie      
Clamp B-Axis     Opaque [2] PE None Opaque PE None
Release B-Axis Blue [8] PE None Blue PE None
Clamp C-Axis Black [9] PE None Black PE None
Release C-Axis Orange [1] PE None Orange PE None
TRP Black [7] PU Black BLack PU Black
Taper Pressure Clear [6] PU None Clear PU None
Electrospindle coolant Black [3] PU Green Opaque PE Green
Electrospindle coolant Black [5] PU Green Opaque PE Green
Flood coolant Blue [4] PU Blue Blue PU inner braid Blue

5

Verify the B and C-Axis brake solenoid air lines match the CALM Cabinet schematic.

Software Update

1

Note: The machine needs to have software version 100.24.000.1101 or higher.

Download configurations from the HBC portal and update the Machines software.

Follow the Software Update - (Option 2) - NGC to load the new configurations.

2

Remove the T-0142 Spindle Jumper from the NGC Main PCB and plug the Spindle encoder cable back in.

Power on the machine and reset Factory setting 4.004 Spindle Disabled from True to False.

Reset parameter 76 Low Air Pressure Alarm Delay from 999999 to 30.

Set 4.263 from True to False.

Power Cycle the machine.

3

Power on the machine and select the new rotary files:

  • DY-MD-B-S7-S1-V1 (Slave)
    • Axis Configuration: Axis B
    • Physical Connection: 4th Axis
    • Rotary Relation: Slave
    • Location: Tool   
  • DY-MD-C-S7-S1-V1 (Master)
    • Axis Configuration: Axis C
    • Physical Connection: 5th Axis
    • Rotary Relation: Master
    • Location: Tool   

Power off the machine.

Power on the machine.

4

Verify the following parameters/settings:

 Note: If the values on the machine do not match the values listed below, change the parameter/setting.

6.272 = 0

7.272 = 4

6.083 = Enabled_Linear

7.083 = Enabled_Linear

4.004 = False

4.116 = 0

6.129 = 12

7.129 = 13

76 = 30.0

4.263 = False

 Note: If 4.263 is changed the machine needs to power cycle. 

Verify Axis Motion

1

Verify all axis motion and loads.

 Warning: Do not power up restart the machine or command a tool change as the tool changer arm is not aligned to the spindle and the Z-axis tool change position has not been set for the double yoke assembly. 

Tool Changer Alignment

1

Set the Z Tool Change Offset by following the steps in the Side-Mount Tool Changer - Z-Axis Tool Change Offset – NGC procedure.

 

Set the Spindle orientation by following the steps in the Side-Mount Tool Changer - HSK - Spindle Orientation Offset – NGC procedure.

Complete an Inspection Report

1

Complete the latest inspection report found in the Alignment Inspection Report and Checklists folder on HBC.

 Note: This site is available only to Haas Service Techs.

Please refer to the H-5AX Double Yoke Spindle Head - Geometry Guide for further details on how to perform the 5AX inspection report checks.            

Note: MRZP will be completed after the probe is calibrated and the compensations are calculated later in the procedure. 

B and C-Axis Compensation

1

Calculate the compensation values of B=+90, B=-90, C=+90, C=+180, and C=-90 by following the step in the H-5AX - VR DOUBLE YOKE - HDC - B/C-AXIS COMPENSATION procedure.

Take a back up after populating the compensation values and attach it to the machine history.

Calibrate Probe

1

Calibrate the probe by following the steps in the WIPS - Probe Calibration - NGC procedure.

MRZP Calibration

1

Set MRZP by following the steps in the MRZP Calibration procedure. 

Safe Zone Calibration

1

Set Safe Zones by following the steps in the Safe Zone Calibration procedure.

Test Cut

1

Complete the H-5AX test cut procedure.

Adjust the MRZP values as needed.