Haas Automation ST User manual

ST, DS - Alignment Correction - Introduction
Correct lathe alignment makes a common centerline through the spindle [1], the turret pocket [2], and the tailstock [3] or
secondary spindle. If the turret crashes, the lathe can lose its alignment. This procedure tells you how to correct the lathe
alignment. For clarity, the illustrations hide surrounding components.
Prerequisites
Make sure the machine is level. Refer to the Lathe Leveling Video.
Haas Technical Documentation
ST, DS - Alignment Correction
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Applies to machines built from:
June, 2010
Copyright 2018 by Haas Automation, Inc. No unauthorized reproduction | Last Published On November 05, 2015 1/67

Tools Required:
1. T-0025 - 5/8" Hex Extension for ST-20/30 Spindle Head
2. 0.0001-inch (0.002 mm) indicator
3. 0.0005-inch (0.01 mm) indicator
4. Spacer for the Spindle Alignment Tool (for ST-40 Big Bore only)
5. Adapter for the Spindle Alignment Tool (for ST-40 Big Bore only)
6. 0.0005-inch (0.01 mm) Coaxial indicator. The indicator shaft size must be 0.375 inches (9.525 mm), to fit into the
coaxial indicator mount (T-0017).
7. T-0017 - Coaxial Indicator Mount
8. Face Indicator Tool
9. Tailstock Alignment Tool
10. Spindle Alignment Tool
11. Optional: Spindle Head Alignment Tool (for ST-20/30, DS-30 only). To make this tool, refer to ST-20, ST-30, DS-30
Spindle Head Alignment Tool. To attach this tool you need a 1/2-13x1 flat head cap screw.
Refer to the Field Service Lathe Level and Alignment Checklist for the part numbers of these alignment tools for each lathe model.
Parts Required:
(6) Rail Plugs (P/N 20-4300)
Copyright 2018 by Haas Automation, Inc. No unauthorized reproduction | Last Published On November 05, 2015 2/67

ST, DS - Spindle Centerline to Z Axis Parallelism Correction
This section tells how to correct the alignment of the spindle housing [1] to the Z Axis travel [2].
STEP 1
Refer to ST, DS - Spindle Centerline to Z Axis Parallelism Check to
measure the alignment on the top of the alignment tool.
If the error is greater than 0.0004" (0.01 mm) per 10" (254 mm), correct
the alignment in the steps that follow.
Note: This adjustment is rare. If the error is greater than 0.0004"
(0.01 mm), measure the alignment again. Make sure the
alignment tool is aligned and make sure your indicator setup is
stable.
Copyright 2018 by Haas Automation, Inc. No unauthorized reproduction | Last Published On November 05, 2015 3/67

ST, DS - Y Axis Square to Z Axis Correction
This section corrects the squareness of the Y-Axis [1] to the spindle centerline [2]. This procedure applies only to machines with
the Y-Axis option.
STEP 1
Measure the squareness of the Y Axis to the Z Axis. Refer to ST, DS - Y
Axis Square to Z Axis Check .
Note: This procedure is very similar to the procedure ST, DS - X
Axis to Z Axis Squareness Correction.
Copyright 2018 by Haas Automation, Inc. No unauthorized reproduction | Last Published On November 05, 2015 14/67

STEP 2
Look at the indicator to see the amount and the direction of the error.
STEP 3
Press [ZERO RET] to set the [DIST TO GO] values to 0. Press [HAND
JOG] to see the coordinate position display. We will return to this 0 [DIST
TO GO] position in the steps that follow.
STEP 4
Jog the Z Axis a small amount to move the indicator away
from the spindle.
You will jog the X and Y Axes to move the turret to get access
to the screws.
There are (16) screws [1] that attach the saddle to the linear guide trucks
(4 for each truck), and (10) screws [2] that attach the saddle to the
ballscrew nut housing.
Copyright 2018 by Haas Automation, Inc. No unauthorized reproduction | Last Published On November 05, 2015 15/67

STEP 5
Use a screwdriver and a dead blow hammer, or a drill, to remove the
plugs that cover some of the screws.
Note: You must destroy the plugs to remove them.
STEP 6
Jog the X and Y Axes to move the turret to get access to the (10) screws
that attach the saddle to the ballscrew nut housing.
STEP 7
For some of the screws you must use the access holes in the wedge.
There are access holes on the left side [1].
Copyright 2018 by Haas Automation, Inc. No unauthorized reproduction | Last Published On November 05, 2015 16/67

STEP 8
There is an access hole on the inside [1], and there are access holes on
the right side [2].
STEP 9
There is also an access hole in the rear.
Jog the Y Axis to move the access holes to the correct
positions to loosen the screws.
Note: You must jog the X Axis to near the middle of travel to jog
the Y Axis the full distance.
STEP 10
Loosen a small amount the (16) screws [1] that attach the saddle to the
linear guide trucks, and the (10) screws [2] that attach the saddle to the
ballscrew nut housing.
Note: After you loosen the screws, tighten them enough to let
you control the adjustment, but keep them loose enough to let
you correct the alignment. This is approximately 5-10 ft-lb (7-14
Nm).
Copyright 2018 by Haas Automation, Inc. No unauthorized reproduction | Last Published On November 05, 2015 17/67

STEP 11
Tighten (1) screw to approximately 20 ft-lb (27 Nm) to use as a pivot in the
steps that follow.
Note: Keep the pivot screw loose enough to allow the casting to
rotate, but tight enough to prevent unwanted movement.
STEP 12
Note: You can choose any one of the (4) corner screws [1] as the
pivot screw.
STEP 13
Remove (1) screw at the corner opposite to the pivot screw.
Copyright 2018 by Haas Automation, Inc. No unauthorized reproduction | Last Published On November 05, 2015 18/67

STEP 14
Jog the Axes until the [DIST TO GO] values are 0 again.
STEP 15
The indicator shows amount and direction of the error.
STEP 16
Insert a pry bar into the empty screw hole and push the wedge into
alignment.
Copyright 2018 by Haas Automation, Inc. No unauthorized reproduction | Last Published On November 05, 2015 19/67

STEP 17
The saddle moves around the pivot screw.
STEP 18
Push the pry bar while you monitor the indicator to see the correction.
STEP 19
Tighten the (16) screws [1] that attach the saddle to the linear guide
trucks. Tighten to approximately half of the specified torque.
For torque values, refer to Haas Fastener Torque Specifications.
Copyright 2018 by Haas Automation, Inc. No unauthorized reproduction | Last Published On November 05, 2015 20/67