Proposals for preventive maintenance: CNC Double column Surface Grinding Machine – KSL Series

Self-diagnosis: KSL series self-diagnosis menu

Every part of the machine is a consumable, so it may degrade and be damaged. Using the machine under such circumstances may cause it to break down.

To prevent machine breakdowns, use the self-diagnosis menu to determine if it is necessary to replace or repair parts.

Inspection items

1. Spindle(KSL-F: Bearing specification）
2. Hydrostatic bearing spindle (KSL-F: Hydrostatic bearing specifications)
3. Dynamic bearing spindle (KPL: Dynamic bearing only)
4. Bed bellows
5. Cylinder for table driving

If any of the following applies, a machine overhaul may be necessary.
First, please check each of the following items.

Note 1: For KPL users, check item 2. if spindle has hydrostatic bearing and item 3. if it has dynamic bearing .

Note 2: For KPL users, check item 1. if spindle is bearing and item 2. if it has hydrostatic bearing. Check items 4 and 5 regardless of the machine type.

①Spindle (KSL-F: Bearing specifications）

1. The operation time has exceeded 10,000 hours.
2. There is a strange noise when the spindle is rotating.
3. It feels strange when it is rotated manually.

②Hydrostatic bearing spindle (KSL-F: Hydrostatic bearing specifications)

1. 20% or more of the pocket pressure is down compared to the start.
2. The filter is clogged.
3. There is abnormal heat generated.
4. There is a strange noise when the Hydrostatic　bearing spindle is rotating.
5. It feels strange when it is rotated manually under hydrostatic pressure (scraping, changes in weight, etc.)
6. The oil is dirty.

③Dynamic bearing spindle (KPL: Dynamic bearing specifications only)

1. The free running time differs. (15 seconds or so is normal; 9 seconds and below is considered abnormal.)
2. The filter is clogged.
3. There is a strange noise when the Hydrostatic　bearing spindle is rotating.
4. It feels strange when it is rotated manually under dynamic pressure.
5. The oil is dirty.

④Bed bellows (front and back)

1. There is significant degradation.
2. There is damage such as holes.
3. It is bent.

The bellows is a consumable, so it may degrade and be damaged when used for a long period of time.
Using the machine under such circumstances may cause coolant, waste, etc., to enter the bed groove and cause the machine to break down.

⑤Cylinder for table driving

1. It feels strange when moving the table.
2. Oil is leaking near the cylinder.

The cylinder is hidden by the bellows, so it is not visible usually.
As a result, operators may not notice any damage, which may lead to a major machine failure.

Please contact us if any of the above applies.

Updating control devices that cannot be repaired

Some control devices installed in our grinding machines cannot be repaired after the production has stopped and the applicable service period has passed, even if they are broken. If a part of the device breaks down, the entire device needs to be replaced.

Some devices may take a while to prepare, so there is a risk that they may need to be stopped for a long period of time after they break down. As preventive maintenance, we recommend updating control devices before that happens.

The list below is an example of such devices. We can offer solutions individually if you have questions or requests.

List of control devices that cannot be repaired

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