Porta II mount needs help w damping time
Posted 26 March 2013 - 09:04 PM
Posted 26 March 2013 - 09:35 PM
Posted 26 March 2013 - 09:50 PM
Posted 26 March 2013 - 09:57 PM
I'm using a Celestron ASGT tripod and on mine the Celestron center bolt only engaged the Porta II by about 3 threads. I had to modify the Porta II adapter (the black piece on the bottom of the head) to get more 7+ threads.
Can't compare to the original Vixen Porta tripod as I only purchased the head and already had the tripod from another project.
Others on CN have used the Hands On Optics wood legs and report good performance - but I have no personal experience with those.
Posted 26 March 2013 - 10:09 PM
You may want to consider the modification I did to my Porta II in another thread Link
This cost only a few dollars and may reduce the vibration issue sufficiently. If not, you are only out a little time and money. I to was looking for a low $ solution and did not want to purchase another tripod. Someone has mentioned replacement wood legs from Hands on Optics but it required modifications to fit.
I sure others have found good tripods to recommend if you want that solution. I look forward to seeing what other people have done.
Posted 26 March 2013 - 10:26 PM
The Porta II head attaches to the tripod with a single M10 bolt - same thread as some other Vixen tripods and also Celestron ASGT and CGEM, Meade LX75 (and others?), Orion/Skywatcher/Synta CG-5, CG-6 etc.
Just for FYI, the CGEM uses a 12mm center bolt.
Posted 26 March 2013 - 11:24 PM
I had been told the CG-6 (atlas) was 10mm as well. Wonder if it too is 12mm.
Posted 27 March 2013 - 08:23 AM
Excellent ideas and thanks again
Posted 27 March 2013 - 03:25 PM
Posted 27 March 2013 - 06:41 PM
Posted 27 March 2013 - 08:10 PM
Posted 27 March 2013 - 08:58 PM
Hi Locoman and thanks for your comments. I agree that the Porta II mount can develop slop and play in the gearbox. I have taken mine apart and removed all the slack in both Altitude and Latitude, works like a charm. (The blue label can be removed and replaced without significant damage) I guess i will find out in a few days if it is the mount or the tripod. I am thinking tripod but stay tuned and i will let you know.
How did you take off the decal and put it back on?
Posted 27 March 2013 - 09:32 PM
Posted 30 March 2013 - 09:42 AM
Posted 30 March 2013 - 12:22 PM
I am not sure of the name of the tool. I can take a pic tomorrow and post it but it looks like a dental pick on steroids. Actually a small flathead screwdriver may work as well. Basically the decal is only attached around the very outside perimeter only by about 1/8". Once you pry one side of the decal up it is easy to remove.
This indeed how it can be done. However, I took mine off a few days ago to lube and tighten the elevation gearbox and using the pic or a sharpened probe I just could not remove the decal without damage.
The decal is actually a thick vinyl sandwich on an aluminum plate. Total is about 2mm or .080" thick. On mine it was fit so well into the mount head that I could not get any tool under the edge to pry it up.
So mine got damaged. I've elected to just paint the space under the decal ( where the cap screws are that mount the elevation gearbox) a textured white to match the rest of the head. That way I can disassemble at any time without dealing with the decal. As delivered the space under the decal is bare metal.
If you are especially picky about keeping the decal, and yours is fitted tightly like mine there's a good chance you will damage it.
BTW most of the excess play in my Porta II was in the elevation gearbox. Taking apart, lubing, and reassembling did help mine quite a bit. Of course YMMV.
Posted 30 March 2013 - 12:54 PM
Posted 30 March 2013 - 03:13 PM
Posted 30 March 2013 - 03:30 PM
Munchmiester, how did yours mount to the Oberwerk Tripod? Was there any modification done? I thought it would just bolt on but no.....never that simple
Posted 12 April 2013 - 06:22 PM
A BIG Kudo's to Manny Miles for custom making the parts to fit the mount to the tripod. Not only is it a very professional look but it saved me many$ compared to buying parts from Vixen & Oberwerk. Plus the EP tray is VERY nice! Thank you again Manny!!!!
A few pics for those interested..
Posted 12 April 2013 - 10:29 PM
That looks great. Good to hear of the improvement and thanks for the wonderful pictures.
I notice a lot of trees...how is your viewing?
Best, Linda B.