- Category: iEQ45
- Published on Tuesday, 21 January 2014 00:32
- Written by the3dwizard
- Hits: 357
I recently noticed that the washers on the Latitude Locking Screws where deformed. It always seemed that these screws would not lock down tight enough. It would appears that the bolt/washer is not wide enough to span the gap. After removing the washer is it clear they are not doing their job. Looking at the most recent iteration it looks like iOptron switched to a wider diameter bolt. However, this doesn't help those of use who have the older mounts. So while I could contact iOptron and try to purchase replacement bolts I felt a trip to my local Ace Hardware store was in order.
- Category: Uncategorised
- Published on Wednesday, 09 January 2013 20:54
- Written by Phillip Easton
- Hits: 4218
Looking at my setup I was always concerned about the number of cables and how they hung off my Orion 190mm OTA and the iEQ45 mount. Major concern was having a cable snag and rip something out. Also was some concern that it might be affecting my tracking/guiding. So I did some searching but references were sparse. Posed the question on Cloudy Nights and got some excellent advice and information. In addition Rudy posted on flicker what he had done in combing the power and USB so that only two cables ran up the mount. I also found a page on cable organization that provided some good information. This seemed like a great idea so over the holidays I set out to do the same.
First step was to plan how and what I was going to support. If I was going to collapse to just two cables, (power & USB) then I needed to support the following out of the hub.
- 3 USB connections - DSLR, focuser, & guide camera
- Needed to supply 5v for USB hub. In past testing a non powered hub would not support the DSLR, guide camera etc. so need to supply power for a powered hub.
- Also need to supply 7.5-8v for the DSLR
- 12v connections for dew, fan, etc.
- Category: Pinewood Derby
- Published on Monday, 29 October 2012 17:23
- Written by Super User
- Hits: 958
So what does it take to make a winning car? Below I out line some of the basic and key things you need to do. You may read tips in books or at other sites but often they are just conjecture. Most are good but some you can't really be sure if they work. Now it may not be possible to test everything, however I have made an attempt to test some of the key ideas to see if they work. In addition looking at the data you can get an idea of how much of an impact a modification might have.
So here are some of the basic things you need to do
- Make the car streamlined, the race is short enough that areodynamics doesn't play a huge part but you still want to avoid blocky designs , streamers or flags.
- De burr and polish axles, (article coming soon).
- Make the weight of the car close to maximum, (but don't go crazy trying to get it exact). Article here
- Lubricate your axles with a graphite / molybdenum lubricate. Article here
If you want to take your car to the next level then I recommend the following:
- Lengthen the wheel base, (coming soon)
- Make the center of gravity around 4 1/2 -5 inches from front of the car. Article here
- Round and polish wheels (article coming soon)
- Cut speed axles (article coming soon)
- Select the four fastest wheel/axle combinations. Described in this article
- Put the slowest wheel/axle combination on the front and raise it off the track. Article here.
Remember to have fun.