EzCBP Equatorial Platform - It Really IS Easy!
Posted 24 August 2013 - 04:20 PM
By Michael Coren
Posted 25 August 2013 - 05:37 PM
Posted 26 August 2013 - 10:11 PM
Posted 27 August 2013 - 09:23 PM
Posted 27 August 2013 - 09:31 PM
I agree with you about the 1/10 inch measurements, and I mentioned that in the article. When I was in college I took a drafting course and had to buy an engineering scale that was graduated in 1/10 inch, but other than that just about every ruler and tape measure I've seen in the US is in 1/8, 1/16, 1/32, etc. I wouldn't bet on the US going metric anytime soon.
Posted 27 August 2013 - 10:10 PM
Posted 28 August 2013 - 11:43 AM
Posted 31 August 2013 - 01:06 AM
Posted 31 August 2013 - 09:42 AM
Another option: A few years ago I was working on a 6" dob with my kids and we needed two circles for the altitude bearings. I knew I wouldn't be able to cut two circles myself of good roundness and matching diameter, so I asked a colleague who I knew did a lot of wood work to help out. The next day he gave me two perfect matching circles cut on his band saw.
Posted 31 August 2013 - 02:12 PM
Nice review, and a nice build of the platform. However, I would suggest, Michael, that you test the platform on some night when the seeing will allow 300X. I found that my ExCBP contributed too much vibration to the image to be usable at that power--a fact that I could only see by turning the drive on and off repeatedly while observing Saturn in my 8-inch on a night of very good seeing. It was handy, however, for star parties and such, but I finally sold it.
I've read sometimes the vibration is one motor working too hard due to balance or whatever. A second motor in tandem appears to iron out these things.
Posted 09 September 2013 - 09:04 AM
1) put two switches to stop the motor at each end of course backward and forward.
2) add two leds (red and green) on the control box as indicators for forward/reverse.
3) put triangle 45° for fixed latitude and so reinforcing the panels.
Inconvenient: no system to restore the sector at end of tracking. you have to lift up the upper table to put it back to the beginning. Tedious when you have the scope on it. I have to think abpout putting a lever mechanism to do that.
If the motor fail, Ted can supply n another one, but the price for it, is 95$ !!
I had to change one of the switches wich was bad.
Posted 07 November 2013 - 02:05 PM
Posted 23 November 2013 - 07:15 AM
I'm likely to go for a dual-axis kit pretty soon. Your experience is very encouraging for me.
Posted 10 February 2014 - 02:02 PM
Posted 11 February 2014 - 11:36 PM
I used this technique for cutting the top and bottom boards and the sectors.