بعد تعديل مؤخراً علبة تغيير الاتجاه على منصة Celestron NexStar SE، والتي حلّت في البداية مشكلة الحركة، واجهت الآن عقبة أخرى. توقفت المنصة مرة أخرى عن الحركة في اتجاه التصحيح، ولكن هذه المرة مع معضلة إضافية: قفل الحلقة التي تحافظ على محور العلبة قد انزاح و لم يعد يمكن تثبيته على المحور.
يبدو أن كل مرة أتخذ خطوة للأمام مع هذه المنصة، أنتهي بخطوتين للخلف. أصبحت متعباً من هذه المشاكل المتكررة. هل يعلم أحد ما إذا كان من الممكن الحصول على هذه الحلقة الخاصة مباشرة من شركة Celestron أو من موردين بديلين؟
The material quality is poor. The teeth appear to be damaged.
I’m unable to view external images or links. If you could copy and paste the text of the original comment here, I’d be happy to rewrite it for you.
This piece just fell out of the mount randomly. What is going on? I’ve barely used this thing.
Make sure to place the brass bushing on first, similar to a washer, then install the black circlip into the groove on the shaft.
That’s a circlip, which holds gears and similar components in place on a shaft by fitting into a groove. The movement you’re experiencing is likely due to that clip coming loose.
The brass ring appears to be a bushing, and the black piece likely clamps around the shaft to secure it in position.
A well-stocked hardware store should carry them. Measure the diameter, preferably with calipers if you have them. I can’t recall their exact name.
The brass ring functions as a crush sleeve to ensure the bearing’s center race moves with the shaft. The black snap ring secures everything in place. When installing the snap ring into the shaft groove, handle it carefully, as it can rotate and potentially launch away unexpectedly.
After searching for about 30 minutes and nearly giving up, I found the black retaining clip—often called the “Jesus clip”—in an almost impossible spot. It wasn’t simply lying where it fell; it must have bounced off something and landed in that tight space. With it back in place, I can now focus on setting up CPWI and PHD2 with my new guide camera. I’m looking forward to improving my guiding and capturing a better image of M42.
To check if the Jesus clip is secure, insert a toothpick into one of the two small holes in the clip and rotate it. If it stays in place, it’s secure. If it falls out, the clip may be broken, stretched, or bent, and you’ll need to replace it with an exact-fit replacement from a hardware store. The new clip should snap tightly into place—test it again by rotating.
It helps to have the proper tool for installation, which resembles small pliers with a fine pin that fits into the clip and opens it slightly without overstretching. It’s possible the clip was previously overstretched during installation, causing it to come loose.