Polar 115E error 286 and 656

Good afternoon, comrades. Help with the problem with the Polar 115E error 286, appeared first with the equipment warming up (all fans were replaced, but there was no result). It was noticed that an error occurs when passing the 531mm mark..... there is an induction sensor in this place, but there is a signal when passing it. (I apologize for the English.. machine translation)

 

- Make a reference run and move the backgauge alongt the entire width of the table,
if the position of the mechanical reference point switch has been modified
- Erroneous or wrongly adjusted switching flag of reference point sensor
- Pulse generator defective
- B 341 defective (mechanical reference point switch)
- Check the proper mechanical connection between spindle and front extension part.
- Start a reference run of the backgauge to update the reference value

 

Good afternoon,

Thank you for your detailed feedback regarding the Polar 115E – Error 286.

After reviewing the behavior you described (error appearing during warm-up and repeatedly around the 531 mm position, despite the inductive sensor giving a signal), the most probable root cause is a loss of mechanical reference of the backgauge.

This usually comes from one of the following factors:

Even if the inductive sensor reacts, the switching flag may be slightly out of position, especially after thermal expansion during warm-up.

Any looseness or shifting creates a mismatch between the real backgauge position and the position calculated by the system.

A weak or unstable pulse generator can cause an inconsistent position reading, often visible at specific travel distances (such as 531 mm).

Recommended Solution

Perform a complete reference run of the backgauge to recalibrate the mechanical zero point.

Check and realign the switching flag of the reference point sensor; ensure correct distance and timing when passing the sensor.

Inspect the mechanical connection between the spindle and the front extension part; tighten or correct any play or misalignment.

Test the reference point switch (B341) and verify signal stability when the machine is warm.

Check the pulse generator, especially for signal loss after heating.

In most cases, the issue is resolved by correcting the switching flag or eliminating mechanical play, then performing a new reference run to update the reference value.

Let me know if you need support with step by step diagnostics or adjustment.
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Kind regards