Languages

Reply to comment

Fix iOptron ZEQ25 overcurrent error

I bought zEQ25 4 years ago, but have used less then 10 times. Last month it begun to show 'DEC overcurrent error', so I contacted with iOptron but they said that "zEQ25 is a very old product which had out of support and no replace parts available now!"

I was so disappoint that my fresh new mount which used less then 10 times has broken, but iOptron refused to help.

So I disassembled it and decided to fix it myself.

The motor is a cheap brushed DC motor, I thought the brushes might be the source of problem, but after disassembling, the brushes seems just fine.

IMG_6754.jpg

Next I measured the resistance of each Coils, they were 4.5R,4.3R,2.5R. It's weird that one coil has a different resistance than others. I guess the commutator might be polluted by carbon from the brushes.

IMG_6752.jpg

After cleaning the gaps on the commutator with a knife, the resistances all rise to 6R! I reassembled the motor and do some tests, the overcurrent problem had gone!!!

IMG_6757.jpg

P.S. you may need a 0.89mm hexagonal wrench to loose the encoder on the tail of the motor.

Customers which refused by iOptron, you now have another options: fix it yourself!

Reply

The content of this field is kept private and will not be shown publicly.
  • Web page addresses and e-mail addresses turn into links automatically.
  • Allowed HTML tags: <a> <img> <em> <strong> <cite> <code> <ul> <ol> <li> <dl> <dt> <dd>
  • Lines and paragraphs break automatically.

More information about formatting options

CAPTCHA
This question is for testing whether you are a human visitor and to prevent automated spam submissions.
Image CAPTCHA
Enter the characters (without spaces) shown in the image.