The Piston AZ mount
Posted 31 July 2010 - 03:33 PM
The altitude bearing is the original bolt of the piston. The axe is a long 12 mm screw, assembled with nuts&washers. I will make an orizontal plate fixed with 2 screws instead the ones with plastic heads and a tension teflon pad, pressed with one screw, to control the altitude smooth moving and fix in the position. The instrument is fastened to the axe with a galvanised steel plate (standard for wood buildings) and some nuts and washers.
Except the teflon pads, all nuts&bolts are cheap and easy to find at local store, you need only hand tools to build this simple mount. You can put 2 instruments in parallel, replacing the counterweight with another plate.
Posted 31 July 2010 - 05:14 PM
I guess many of the great ideas don't come in front of the CNC machine
I believe it's much more sturdy then your first version, the pipe mount.
It's just me or it resemble with a Giro mount?
Posted 31 July 2010 - 06:18 PM
Of course, it resemble a Giro mount, not so beautiful... I wonder to keep or not the black burned oil coating? :rollgrin:
Posted 01 August 2010 - 12:08 PM
Posted 01 August 2010 - 03:47 PM
I kept the rings on as it was get from the engine, maybe that car has travel more than 4-5 Equators...
Posted 02 August 2010 - 04:13 PM
One of my telescopes has a cam sprocket counterweight. Maybe should start a car parts astronomy thread called, perhaps... Auto-star?
Posted 02 August 2010 - 04:41 PM
A car has a lot of useful parts, but be aware: do not disassemble your own!
Posted 02 August 2010 - 06:07 PM
Posted 03 August 2010 - 02:04 AM
I like that - very clever Tavi!
Maybe should start a car parts astronomy thread called, perhaps... Auto-star?
Posted 03 August 2010 - 01:19 PM
Posted 03 August 2010 - 05:51 PM
Seriously, a clever and innovative idea.
Perhaps you should also post this in the Frugal Astronomer thread in the Beginners Forum.
Posted 15 August 2010 - 03:41 AM
Posted 22 August 2010 - 08:17 AM
In the left is my homemade Fraunhofer 80 F/11.25 refractor and in the right side is the MTO11-CA russian teleobjective modified as a visual maksutov telescope.
The mount work great, easy to position on the sky, the only problem is vibration, the orizontal axe is to thin.
Yes, the white dot near the Hyperion eyepiece is Lady Moon!
Posted 29 August 2010 - 03:07 PM
This mount is more expensive than first, I had to design and made special parts: the axis, bushings, fine aligning systems... which I'm working these days. I want to use nut-screw mechanisms at both axis for this mount, cause I have no worm gears available.
It will looks like this:
The diameter of the tractor piston is 110mm, the orizontal axe is 32mm dia. by 300mm long. This mount will support two heavier instruments, maybe one of them will be a 200mm cassegrain which I want to build nextyear...
Posted 30 August 2010 - 03:08 AM
For such a serious mount it would really be nice to fit worm gears on both axis and steppers connected to a computer and voila...go to mount
Some nice worm gears could be cut on lathe with a standard tap. Although it's not a by the book method to cut worms gears, many amateurs got very good results with a bit of patience and practice.
Check this out http://www.atmsite.o...r/wormgear.html
Posted 30 August 2010 - 03:30 AM
Posted 29 September 2010 - 03:34 PM
- internal alu arms for increased rigidity
- accessories triangle dish
- aluminium conical shoes, replacing the rubber ones
- carry belt, cause the tripod is very heavy...
Posted 22 April 2011 - 05:32 AM
Here are azimouth fine tune mechanism:
It's based on a stainless steel M6 long screw:
The Fraunhofer refractor (80F/11.25) and the maksutov-cassegrain teleobjective MTO11-CA (100F/10) on the mount:
The stability of the mount is impressive and the fine tuning, can be improved, but useful. I will test the mount in the following spring hollydays.
Posted 23 April 2011 - 07:02 AM
I imagine that a drive system (maybe even Goto) would be a terrific addition to this mount. The only problem would be finding a good 'n cheap set of worm gears but with some patience...