While I’m waiting for the 3D printed parts for the stepper focuser I’be been making a bit of progress on the secondary mount. Here’s the top plate of the mirror cell with the ball joint and the rotation locking grooved insert and a video to show how it’ll work. You’ll have to imagine the mirror tube as that’s next on the todo list 😉
I like the original secondary mount on my Fullerscope- it cleverly separates the tilt from the rotate of the mirror but it’s a bit crude and too big for my new mirror. The new design is meant to be kinematic and I think it is 🤔 It tilts the mirror on a ball joint and axial rotation is locked by a sliding key way on one of the adjuster screws. There are 2 adjuster screws opposed by strong springs and the second screw and the springs bear down on a nylon swash plate to make the action smooth. The
Working on the motor mount this evening- needs a bit more work but the general idea's there. I'm going to use a magnetic coupling and am thinking to make it quick release so I can take it off if I don't want to use it.
Managed to square up the waveform for the step at the expense of halving it’s max frequency🤦♂️ But I’ve changed the driver board for the version that actually has half step input so my new max speed is about 3sec/rev which looks ok I think. It’s slmost working how I want it but I need to figure out how to shape the response as it’s too long in the very slow movement then suddenly shoots off into high speed- not sure why as the step times should be lin
It’s very rewarding to see the motor moving 😊 Few issues though- it’s not a very linear response at all. I have a feeling that I need to make the step pulse train symmetrical high/low and just vary the frequency. The Trinamic driver I’m using has this feature called microplier where it interpolates input steps to output 256 micro steps for each input step (or 2 as that’s minimum input resolution I can chose without using serial interface) Nice feature as it makes the motor really smooth but it r
Feeling quite 'chipper' today!
Many of my little 'summer' projects have been completed and seem to work. First - my bathroom extract system has been installed without me once falling off the ladder or putting my foot through the bathroom ceiling, second - I'm now producing tasty pizza and bread from my DIY wood-fired bread oven without upsetting my neighbours and third I've constructed four battery powered 'dew zappers' for camera lenses and scope objectives.
The following is proof:
Thanks for dropping into my blog – I have had over 9000 views in total now, which is incredible, so thanks all! As you will know if you have read the previous posts (dating back 4 years or so), I have very slowly been pulling together various bit and pieces of astro gear. Currently I have the following:
Skywatcher EQ3-2 mount (white, non-motorised) – second hand for £90 off ABS
Skywatcher 150PL OTA – new from RVO for about £180
25mm, 10mm eyepieces and 2 x Barl
Yeah, its been a while since my last blog post. Work and family life have been unbelievably busy these past months – added to that the summer nights being short, things on the astro front have taken a bit of a hiatus. However, the nights are slowly drawing in now, and following our recent holiday to Cornwall I am slowly getting more time to get out under the stars!
A couple of weeks ago, we took a family holiday to Cornwall. We stayed on a working farm, on the edge of B
Capturing images of meteors is a bit like fishing. After the event, you are always haunted by the big one that got away!
My widest camera lens is a Canon 18-55mm EFS zoom and even though this covers quite a bit of sky there is plenty left in which a bright meteor can suddenly appear.
As I had two camera bodies, a Canon 600D and 400D DSLR, I decided to try and use them in tandem to improve my chances of capturing more meteors. Fabricating a ‘meteor rig’, reusing equipment and materials
Having completed the excellent and free Future Learn - Open University short course - 'Data to Insight' (University of Auckland) I finally got around to doing something with the copious amounts of data churned out by my SDR LVST (The Lowestoft Very Small Telescope) meteor catcher. I decided to first apply my 'forensic intellect -Dr Lecter'🤓 to the 2016 Perseid Shower (I had a set of data collected from the 4th to 16th of August).
Having done a bit of reading - an American paper from the 19
I'm starting this Blog as I have decided to resurrect my Giant 3D Printer project sometime in the relatively near future. From building other printers I have gained extra knowledge and may have a plan. This will be based on both the Mk.2 and Mk.3 Giant printer designs plus my Concorde 3D Printer for the Z drive system. The main casing has yet to be decided. The print bed will be moving to provide the Z axis, having thought long and hard about a moving XY frame as in the Mk.2 and rejected it.
Well as per usual, real life and Bills loom. I'm trying not to sell of too much kit. But a broken car and stressed fiances beckon.
Now on another note I'm looking to produce a camera lens scope. I have a Takumar 70-150mm lens. I have done some research, ad purchased a T2 to 1.25" visual back from China for £5!. This will allow me to add a barlow, 1.25" diagonal for use as a scope. The lens has a 65mm front aperture, so hoping it may provide a decent travel scope!.
More to follow on th
Perhaps the open outlook to the east
Ensures the leaded panes catch every ray
And part explains why on the dullest day
My eye is drawn up to the colour feast,
After a rubbish couple of months, finally a holiday........a week in the Yorkshire Dales, only a 7.5 hour drive from Kernow but worth it!
A little cottage east of Hawes, nothing but sheep and pheasants and yes dark skies. Great food in small pubs with the friendly locals, Abbey ruins visited and gloriously recommended to sooth
This is a tutorial explaining how to install an operating system and software into a micro SD card to use in a Raspberry Pi 3B+ for astro imaging and control of the relevant hardware. The software to capture images, control camera cooling and other things such as the mount etc. is called INDI and provides a set of drivers to control all the hardware.
The Raspberry Pi will run in what is called "headless" mode - meaning that no human interfaces are directly connected to the
Recently had some bad personal news so did what I usually do in these circumstances.....I bought a new scope
To be precise a Synscan 127mm Maksutov from Rother Valley Optics (no planned advert but have to say great service)
At last clear skies tonight so set up my new scope, used 2 star alignment, Regulas and Sirius as my garden is only any good towards the south (street lights everywhere else), really simple, five minutes and up and running.
Quick tour using handset for messiers
Been a while since my last entry, so thought it about time to log another!
Things are getting a lot busier at work. My area has changed, and I have now taken on Norfolk, along with Bristol and South Wales. I am a Regional Systems Manager for Greene King Pub Co. and look after all the sites IT and till equipment. So, more sites means more meetings and more miles, but I love it - getting out and about, and seeing areas of the country I haven't been too before. The other day I had
After tinkering with the smaller K40 we decided it wasn't quite up to our needs and decided a small upgrade would be more beneficial in the long run. A 12 hour drive and overnight stay in the Lake District later and we arrived back home with a larger 50W machine, a second hand 80W CO2 tube and upgraded power supply. The 80w upgrade will have to wait as we want this machine cutting asap.
It's all set up and running now, but waiting on some extras to make the process a little healthier
So where have I been.......work.....that's it
Have travelled to different continents, seen the southern hemisphere sky and bought another scope, yet to use I might add as something's haven't changed........cloudy skies, stormy weather with heavy rain
In the little time I've managed to get my 200 dobson out, I have finally seen the amazing Orion nebula with uhc filter and also the trapezium, a wonder worth all the cost of this amazing hobby alone. There's something awe aspiring about th
I've offered to give a talk with pictures to our local social group and thought a Blog on here would be a good place to prepare and assemble it. Also, I would welcome any comments and suggestions. I have a few ideas and will see how it progresses. I will probably take me several days to get my initial ideas sorted out.
Note - entry written Thurs 17th Jan
Well, its getting busy at work, and at home now. Coupled with work, my daughter is approaching the end of her A-Levels so she is massively stressed out with both her course work, and her uni applications. I can’t quite believe that my little girl is going to be leaving home in September. Only seems like yesterday that she was getting ready for her first day at school . . . . I am going to find that day very hard I think. We spend our liv
It finally happened – after waiting two weeks and a day, the clouds parted, and I was greeted with a clear, still and cloudless sky!! Whoop Whoop!! 15 days is a long time to wait! The scope (SW Explorer 150-PL) had been sitting in my dining room since Christmas, and despite a very short outing last week, that lasted about 10 minutes, last night was the first time I used her properly.
I popped the tube outside a good hour before I intended to go out to observe, giving it plenty of time to co