Encoder and signal adjustment method for the same

A method for adjusting a signal of an encoder, the encoder comprising:

• a detector;
• means for performing A/D conversion for an analog signal having at least two phases, the signal being output from the detector;
• means for correcting an error of the analog signal after A/D conversion;
• an interpolation circuit for performing interpolation from a result of A/D conversion of the analog signal that is corrected;
• means for storing correction data;
• and
• central processing units having communication means with an external device, the method comprising the steps of:
• sending the result of A/D conversion of the analog signal to the external device by the communication means;
• allowing the external device to detect the error of the signal from a predetermined value and to send the error to the encoder by the communication means;
• and
• allowing the encoder to perform interpolation for which error correction is performed by using the received correction data.

An encoder comprising:

• a detector;
• means for performing A/D conversion for an analog signal having at least two phases, the analog signal being output from the detector;
• means for detecting an error of the analog signal;
• means for correcting the error of the analog signal after A/D conversion;
• an interpolation circuit for performing interpolation from a result of A/D conversion of the analog signal that is corrected;
• means for storing correction data;
• and
• central processing units having communication means with an external device for sending the error of the signal to the external device for displaying and determining a corrected signal.

A method for adjusting a signal of an encoder, the encoder comprising:

• a detector;
• means for performing A/D conversion for an analog signal having at least two phases, the analog signal being output from the detector;
• means for detecting an error of the analog signal;
• means for correcting the error of the analog signal after A/D conversion;
• an interpolation circuit for performing interpolation from a result of A/D conversion of the analog signal that is corrected;
• means for storing correction data;
• and
• central processing units having communication means with an external device, the method comprising the steps of:
• sending the result of A/D conversion of the analog signal after correction to the external device;
• and
• allowing the external device to display and determine the corrected signal.