Slippage at focuser.
Posted: Sat Feb 17, 2024 6:14 pm
Okay,
I'm going to be a newbee with this question and hopefully someone has an answer.
I'm having a problem with the following equipment.
1. Quark Daystar with ZWO ASI174mm-c
2. Explore scientific diagonal.
3. Explore scientificES 80 ed-cf telescope.
Problem stems from the weight of the camera, and Quark sitting at a right angle to the telescope. Explore Scientific makes there 90 degree diagonal with a small taper where it would connect to the telescope. Why a taper? Who knows. The connection to the telescope uses 3 thumb screws and a brass ring to even out the pressure to make the connection. The brass is flat and using a 'taper' to make the connection makes for less surface. I have made a space to space the diagonal away so that the connection area is flat. This seems to help but doesn't fix the problem. With all of the weight at 90 degrees when the telescope slews the weight shifts and tends to cause slippage.
So far my method involves a pair of pliers and getting a bit 'crazy' with tightening the thumbscrews. I just wondered if anyone else has had this problem.
Here's some images showing the problem area.
Here's the scope you can see 2 of the 3 thumbscrews at the rear of the focus tube.
Here's the diagonal, you can see the small taper on the end that attaches to the scope. (I use a spacer to locate the diagonal further out.)
Here's an example of the quark attached to the diagonal, add a cooled ASI 174mm-c to the top of that and you can see the weight issue.
Hopefully somebody has some suggestions. Other wise I will keep using my pliers and clamp that sucker down!!!
I'm going to be a newbee with this question and hopefully someone has an answer.
I'm having a problem with the following equipment.
1. Quark Daystar with ZWO ASI174mm-c
2. Explore scientific diagonal.
3. Explore scientific
Problem stems from the weight of the camera, and Quark sitting at a right angle to the telescope. Explore Scientific makes there 90 degree diagonal with a small taper where it would connect to the telescope. Why a taper? Who knows. The connection to the telescope uses 3 thumb screws and a brass ring to even out the pressure to make the connection. The brass is flat and using a 'taper' to make the connection makes for less surface. I have made a space to space the diagonal away so that the connection area is flat. This seems to help but doesn't fix the problem. With all of the weight at 90 degrees when the telescope slews the weight shifts and tends to cause slippage.
So far my method involves a pair of pliers and getting a bit 'crazy' with tightening the thumbscrews. I just wondered if anyone else has had this problem.
Here's some images showing the problem area.
Here's the scope you can see 2 of the 3 thumbscrews at the rear of the focus tube.
Here's the diagonal, you can see the small taper on the end that attaches to the scope. (I use a spacer to locate the diagonal further out.)
Here's an example of the quark attached to the diagonal, add a cooled ASI 174mm-c to the top of that and you can see the weight issue.
Hopefully somebody has some suggestions. Other wise I will keep using my pliers and clamp that sucker down!!!