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

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)

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.

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.

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.

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].

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).

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.

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.

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.

STEP 20

Measure the squareness. If the alignment is not correct, repeat the

previous steps.

STEP 21

If the alignment is correct, tighten the (10) screws [1] that attach the

wedge to the ballscrew nut housing. Tighten to approximately half of the

specified torque.

For torque values, refer to Haas Fastener Torque Specifications.

STEP 22

Measure the squareness.

STEP 23

If the alignment is correct, torque the (16) screws [1] that attach the

wedge to the linear guide trucks.

For torque values, refer to Haas Fastener Torque Specifications.

STEP 24

If the alignment is correct, torque the (10) screws [1] that attach the

wedge to the linear guide trucks.

For torque values, refer to Haas Fastener Torque Specifications.

STEP 25

Replace the plugs (P/N 20-4300) that cover some of the screws.

Caution: Without the plugs, chips can build up in the holes and

the wiper can sweep them into the linear guides and cause

damage.

ST, DS - X Axis to Z Axis Squareness Correction

This section corrects the squareness of the X Axis [1] to the spindle centerline [2].

STEP 1

Refer to ST, DS - X Axis to Z Axis Squareness Check to measure the

squareness of X Axis movement to the Spindle Centerline.

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.

Jog the X Axis to move the turret to get access to the screws.

STEP 5

Loosen a small amount the (10) screws [1] that attach the wedge 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).

STEP 6

Loosen a small amount the (16) screws that attach the wedge to the linear

guide trucks.

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).

STEP 7

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 8

Note: You can choose any one of the (4) corner screws [1] as the

pivot screw.

STEP 9

Remove (1) screw at the corner opposite to the pivot screw.

STEP 10

Jog the X Axis and the Z Axis until the DIST TO GO values are 0.

STEP 11

The indicator shows the amount and direction of the error.

STEP 12

Insert a pry bar into the screw hole and push the wedge into alignment.

STEP 13

The wedge moves around the pivot screw.

STEP 14

Push the pry bar and monitor the indicator to see the correction.

STEP 15

Tighten to approximately half of the specified torque the (16) screws that

attach the wedge to the linear guide trucks.

For torque values, refer to Haas Fastener Torque Specifications.

STEP 16

Measure the squareness.

STEP 17

If the alignment is correct, tighten to approximately half of the specified

torque value the (10) screws that attach the wedge to the ballscrew nut

housing.

For torque values, refer to Haas Fastener Torque Specifications.

STEP 18

Measure the squareness.

STEP 19

If the alignment is correct, torque the (16) screws that attach the wedge to

the linear guide trucks. For torque values, refer to Haas Fastener Torque

Specifications.

STEP 20

If the alignment is correct, torque the (10) screws that attach the wedge to

the ballscrew nut housing.

For torque values, refer to Haas Fastener Torque Specifications.

STEP 21

For machines with a Y Axis, you must align the wedge [1], after you align

the saddle [2], as shown in the previous section.

STEP 22

For machines with a Y Axis, the steps to align the X Axis are the same as

the previous steps.

Loosen the (16) screws that attach the wedge to the linear guide trucks

and the (8) screws that attach the wedge to the ballscrew nut housing.

The only difference is that the (8) screws that attach the wedge to the

ballscrew nut housing are in the rear, as shown [1].

Haas Automation ST User manual

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