Stuertz Infeed - Check GY Position Parallelism

How to check the parallelism of the Stuertz Infeed - GY axis position to backfence

Difficulté

Hard Difficile

Durée

30 minute(s) minute(s)

Stuertz_Infeed_-_Check_GY_Position_Parallelism_Screenshot_2023-01-31_070146.jpg

Introduction

It is important that the parallelism of the GY axis to the backfence is set and maintained along the length of the rack. This tutorial describes how to check this parallelism without the need for measuring equipment

General Procedure

1. Find range of adjustment required
2. Zero GY axis to ensure range adjustment can be met
3. Move to straight edge resting points, Adjust rollers at these points
4. Use straight edge between resting points to adjust the other rollers to a fixed datum

Potential Symptoms of a problem

• Gripper cannot pick up offcuts
• Gripper /profile end forced away from backfence
• Accuracy problems
• Gripper wobbles after it has released profile

Use the laptop to enable you to control the Service screen whilst inside the infeed table

...You will be inside the danger area of the machine - ensure operators are aware of your situation

The gripper setting jig is used to give an accurate and reliable zero to locate the gripper jaw to. Any piece of aluminium reinforcing box section will also work

• Pièces et outils

Pièces et outils

Gripper Setting Jig

D00154543 Gripper Setting Jig

Gripper Setting Jig

T0000448 2m Straight Edge

Straight Edge For Checking Alignment

T0000448 2m Straight Edge

Étape 1 - Ensure a zero GY position at datum

1. Datum the machine and move GY axis to zero, GZ to 25
2. Place the jig against the backfence and offer it up to the Gripper Jaw
3. If the GY datum is set correctly, the rear outer face of the jig should be just in contact with the rear serrated jaw
4. If this is not the case, set GY datum correctly

Étape 2 - Ensure infeed Datum roller aligns with backfence

Using the straight-edge, ensure the infeed rollers are 0-1mm behind the machining centre datum rollers .

Étape 3 - Find range of Adjustment

1. With the GY at zero, move the GX axis to the last roller before machining centre
2. Check the gripper position relative to backfence
3. Check to see if this is within the adjustment range of the infeed roller

...If the roller has "run out" of adjustment, go back to step 1 and readjust the start point (and GY datum position) to give enough range to get both ends within the range

Étape 4 - Move the GX axis to a measure position

If you have the 2m straight

Étape 5 - Move GY axis to locate

If the backfence to gripper is different in this location, it will be visible by a gap or interference to the jig

Move GY axis (in 0.25mm increments) to make it touch

Log GX value vs the GY value in your table / spreadsheet

Étape 6 - Log GX value vs the GY value in your table / spreadsheet

Étape 7 - Repeat for different GX axis positions

There may be areas where the offset changes more than others - these deserve more detailed inspection with closer GX axis increments

Étape 8 - PASS or FAIL

PASS

The error should be within +/- 1mm along the rack

In the given example of measurements, the overall range was 0 to +1.5mm

Therefor the GY axis datum should be adjusted by+0.75mm so the error range will then be -0.75mm to +0.75mm(within tolerance

FAIL

If the error variance is outside this range, the backfence will need to be rest to correct this

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