YAMAHA-YG系列 换螺杆指导书 - 第39页
Service Engineer Service I nformati on SI080 2008 E-000 = YG series: Replacement proc edure for ball screws of each axis 39/65 4. How to r eplace a ball screw of t he W -axis W -axis adjusts the convey or width wi th ref…
Service Engineer
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SI0802008E-000= YG series: Replacement procedure for ball screws of each axis
38/65
3. Fully tighten the bolt which was loosened temporarily in procedure 2 in order to fix the Plate 1.
Measure the height of the Plate 1 again and if the measured value falls within the specification,
complete the adjustment.
Note:
After adjusting the height of the spacers, if the pushup plate is placed on the spacers and it is not level,
the plate itself may not be flat. In this case, please replace the pushup plate or adjust the height of the
spacers again.
3.3. Adjustment after replacing the axis
The coordinates of the machine deviate due to the replacement of the parts. Therefore, some works
need to be done in order to restore the coordinates in the simple method.
Caution:
Please make sure to do the necessary work before replacement. Otherwise, the interference or
collision of the parts may occur and result in serious damage to the machine during automatic
operation
<Works to be done>
• Adjust the machine reference.
• Adjsut the soft limit of the PU-axis, the height of the initial position, and the initial movement in
Machine setting.
• Check the peak current (With the “Servo utility”).
* Please refer to the relevant section in “5. Adjustment”.
Check if the bolts are tightened properly
1. Press the [Emergency stop] button and check the surrounding area for safety.
2. Check the bolts removed for replacement or loosened are tightened properly.
Check if the bolts are tightened with the appropriate hex wrench and make a mark on the
bolts with the marker pen.
Other items to be checked and done
1. Check if there are any tools used for replacement left in the machine.
2. Check if there are any pieces of cut off cable tie left in the machine.
3. Make sure that all the harnesses are secured properly, and no axes interfere with anything
when they move.
Caution:
Please do not use an air gun for cleaning inside the machine. The blown away dusts may stick to the
moving parts of the axes, which causes the serious problem to the machine.
4. Get ready for the production activity
Put back all the removed parts such as feeders and other supplying equipments to the
original position.
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SI0802008E-000= YG series: Replacement procedure for ball screws of each axis
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4. How to replace a ball screw of the W-axis
W-axis adjusts the conveyor width with reference to the board size in the board data.
Required tools
- Hex wrench set
- Phillips-head screwdriver (Standard type)
- Nipper
- Board (Qty: 3/ Identical ones)
- Threadlocker (Medium strength type)
- New ball screw for the W-axis
- Tension gauge
- Some cable ties
4.1. Work to be done before replacement
The coordinates of the machine deviate due to the replacement of the parts. Therefore, some works
need to be done in order to restore the coordinates in the simple method.
Also, in case the ball screw is broken or the problem such as seizure occurs, the works before the
replacement cannot be performed and various adjustments need to be performed.
Caution:
Please make sure to do the necessary work before replacement. Otherwise, you will need to perform
all the adjustment, which requires a great deal of time later on.
<Works to be done>
- Check the machine reference.
* Please refer to the relevant section in “5. Adjustment”.
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4.2. How to remove the ball screw
1. Turn off the machine before replacing the ball screw.
Check the surrounding area for safety and click on the [OFF] button on the screen. Turn off the
machine following the instruction on the screen.
2. Remove the timing belt between the motor and the screw.
Loosen the two bolts that fix the motor bracket with a hex wrench (Size 4) to loosen the belt
tensioner (*move it to the direction that the arrow indicates as shown in
Figure 54
) in order to
remove the timing belt.
Figure 54
3. Loosen the two bolts that fix the belt tensioner (on the right and left) with a hex wrench (Size 4)
and a phillips-head screwdriver in order to remove the timing belt.
Figure 55
Hex wrench (Size 4)
Fixing bolts for the
motor bracket (M5)
Motor bracket
W-axis
The pulley for synchronizing
the W-axis movement
Hex wrench (Size 4)
Belt tensioner
Phillips-head screw driver
The belt for synchronizing
the W-axis movement