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Member postings for Neil Wyatt

Here is a list of all the postings Neil Wyatt has made in our forums. Click on a thread name to jump to the thread.

Thread: Hello from Notts
11/07/2020 10:13:48

Hi Paul,

Welcome to the forum, I'm in Burton but my daughter is at Notts uni.

Neil

Thread: Back issues & Flash plugin
11/07/2020 10:02:21
Posted by Brian G on 09/07/2020 12:47:59:

Bumped because I would also like to know if the archive will be re-issued. Since this was first raised back in 2017 there has been a format change for the newest content but it is still required to view most of the archive and Microsoft's announcement that "Flash will be completely removed from all browsers by December 31, 2020, via Windows Update." does appear pretty final.

Brian G

Microsoft can only remove flash players from their own browsers...

Neil

Thread: Ultrasonic Cleaner
11/07/2020 10:00:10

I'm a convert to the non-spirit brush cleaner for oil based paints. I found it works better and quicker!

I tried it after using an airbrush cleaning liquid with similar contents that works for enamels and acrylic.

Neil

Thread: How are your clubs responding to Coronavirus
11/07/2020 09:57:39

The astro club I'm in has had two meetings a month on Google hangouts, now added an imaging group as well. So successful these are going to be continued alongside real meeetings.

We can now have an observing meeting outside (but not in) our observatory, but no loos yet and restricted to 'bubbles' of six, so waiting for loos to become available. Alas 'contribute to the hedge fund' has been rejected ...

Neil

Thread: Just for fun
11/07/2020 09:53:32
Posted by Michael Gilligan on 11/07/2020 06:25:05:
  1. The 7 segment display on your calculator contains a cypher

MichaelG.

0.7734

710.0553

710.77345

Thread: Coronavirus
10/07/2020 14:35:48
Posted by Nathan Sharpe on 09/07/2020 20:48:15:

Hi all, I have no idea where I posted first of all but must update those members who responded.. I have had a face to face with a Body movement specialist, no problems as far as he is aware. I also had a telephone consultation with a neurologist , he seems to leaning towards Cerebellar Ataxia. Do any of you suffer from or have a partner/spouse suffering from same? Can you advise on Medication etc?

Nathan.

Moderators, put this where it belongs please.

Hi Nathan,

You posted about your tremor in this thread back in march, this is the place for an update.

I hope things go well for you now you are getting some more specific details.

Apparently one cause is gluten, so while you wait for a fuller diagnosis you might want to try a gluten free diet for a few weeks.

Might be an idea to start a new thread in the 'Tea Room'.

Neil

Edited By Neil Wyatt on 10/07/2020 14:40:04

Thread: Hammer flipping experiment?
07/07/2020 18:25:24

If your hammer stays face down, have you tried the sideways bit?

Try it with a tennis racket.

Neil

Thread: Message from the prime minister
07/07/2020 18:22:42

I'll let that one get through the net... that's not licence to go crazy..

Neil

Thread: Equatorial Platform Build
07/07/2020 10:45:02

Tried it out last night... this is my report copied across from an astro forum:

I managed a test last night, this is an edit of my post in the 'what are you doing tonight' thread after sleeping on it.

Main conclusion- too much stiction on the dob part, I need to make it smoother! Not really an issue with the platform, I think I need to dose it with silicon polish at the very least. It moves in jumps and the minimum AZ move is often nearly a full FOV at ~30mm and getting a target centred at 5mm took forever! Alt is much better but not perfect, although if unbalanced it can move on its own.

As for the platform, PA was easy, at least to the suggested approach of getting Polaris in the finder and adjusting until it stayed still during a slew. The polar angle must be pretty accurate as I just set everything level and the task was setting it due north. Errors were rapidly apparent so a button to stop the slew early will be welcome. My finder's cross hairs come out at 45 degrees but that didn't make the process difficult. Better PA could be achieved with a polarscope in the finder holder and getting Polaris to travel around the circle.

Getting the track rate was hard. A first everything drifted off top left regardless of speed. This made me think it was running too slow. I reduced the delay down to about 15ms until the stars definitely went off the right side pretty sharpish. I then increased the delay, and eventually settled on about 64 milliseconds delay by the time clouds came in, which isn't bad given the estimate was ~68 and expected to need to speed up to allow for compression of the roller. I think the earlier problem was using Lyra which was very high and I suspect a combination of PA error and an unbalanced scope slowly moving in ALT when near vertical.

It was easiest to judge movement using small stars near the edge of the FOV rather than bright ones at the centre. Next time I will use a 25mm plossl with cross hairs.

Incidentally I used a Szentmartoni EP made according to a recipe on SGL that uses three small binocular objectives for about 33mm. As promised it was sharp to the edge and comfortable to use!

I changed to a Skywatcher UWA 5mm to 'fine tune' the tracking rate. the sky wasn't very dark, but I went back and (just) split the double double at 300X - seeing wasn't brilliant, but it seemed to be keeping in place even at that magnification, certainly long enough for planetary imaging.

Changes needed:

I will wire the disabled reset button on the shield across the end limit switch. This will provide a way of interrupting a polar alignment slew, as initial drift is obvious in a couple of seconds, you don't need to wait for a full slew.

I will round the default track speeds 0.1ms and keep the adjustment step of 0.1ms. The 0.1ms seems fine enough and it's annoying that all the readouts are not round numbers - and no point reading the delay to finer resolution than the adjustment. I may change the step to 0.05ms, at the expense of slowing down the tuning process a little.

Although up to speed up tracking and down to slow it seemed logical, as up increases the delay and vice versa. It's confusing to press up and see a number decrease.

The debounce period for the buttons is too long, as are some of the 'confirmation delays' of 1s. I will reduce both.

The 'nudge RA' increment was WAY too aggressive, the briefest of presses and the view changes completely.

A remote handset might be a useful addition, perhaps with a reduced set of controls.

Mechanically, everything worked fine with the platform. Balance is great and I didn't even bother with a nut on the pivot bolt for the dob, so worth considering a plain pin instead. There is some wobble when moving the scope, but it isn't excessive and I didn't notice any when hands-off.

Main beef is with the dob itself, I must find a way of reducing 'stiction' and counter-intuitively locking the alt movement. But my brain is already thinking of ways to add steppers and belt drive to ALT and AZ - perhaps for 2021!

Thread: Hammer flipping experiment?
06/07/2020 20:11:55

Well so far I've learnt what a clumsy lot you are. Should never be allowed near rotating machinery, let alone 'ammers!

Neil

P.S. very good Jason

06/07/2020 18:26:33

This little piece was written as a space filler in MEW 294.

Anyone fancy giving it a go? No spoilers please, I want your own theories:

Here’s an interesting little experiment to try in your workshop (or outside in the garden) as an alternative to going stir crazy (come to think of it, if the neighbours spot you, they may think you have already gone stir crazy). Please be careful throwing heavy tools around…

Take a hefty claw hammer, the sort with a decent wooden shaft. Hold it in your good hand, the face pointing down and the claws upwards. Flip it gently upwards in a single end over end spin and catch the handle.

Which way is the head pointing now? Repeat it, which way is the head pointing. Repeat this a few times and see if you can spot a pattern.

Now hold it with the head horizontal and the face pointing to your left.

Again, flip it gently upwards and catch the handle. Which way is the head pointing now? Repeat the action a few times.

I’m particularly interested in your personal theories about what is happening rather than the results of any internet searches.

Neil

Thread: Opus Proximum
06/07/2020 10:15:06

Sadly I think ME is still waiting for corrected drawings.

Close work, but not close enough it seems...

Neil

Thread: What filament material do you use on your 3D printer?
06/07/2020 10:00:03

Have you tried ABS Juice? (a solution of filament/failed print in acetone) as an adhesion promoter?

Thread: Nozzle Bores
05/07/2020 22:27:47
Posted by The Novice Engineer on 05/07/2020 00:04:27:
Posted by jimmy b on 04/07/2020 02:24:58:

I have ran 0.2 nozzles and got a fantastic finish, but the time taken was not worth the compromise, likewise, a 1mm nozzle is fast, but the quality ain't good!

0.4 does seam to the right mix of speed and quality.

I've come to a similar conclusion ,though for small objects and figures the 0.2mm nozzle with a 0.1mm layer height is outstanding. Tip if the items are very small print 2 of them, gives one a chance to cool down between layers and cuts heat distortion.

You can also set a minimum layer time in Cura that has the same effect.

As for TPU - I find it a very reliable filament! These tyres featured in the latest Ed's Bench were printed in TPU, 3/4" thick, 2 1/2" diameter.

Neil

eds bench 2.jpg

Thread: Upload photos - canít identify which one
05/07/2020 22:22:24
Posted by Michael Gilligan on 04/07/2020 22:07:00:
Posted by Neil Wyatt on 04/07/2020 20:31:22:
Posted by Ian P on 04/07/2020 17:22:38:

Some Apple used do send me images as attachments which is fine. Presumably the Apple default is to embed?

Ian P

To downsample and embed, […]

.

I have just sent a couple of test messages to Ian P

When composing on the iPad, I inserted a photo ... and at that time was offered a choice of small, medium, large, or original file sizes.

It seems that some of your contributors may not be paying sufficient attention.

MichaelG.

.

Here’s a demo for you:

ce712020-8e92-410f-b1b9-db15258430d3.jpeg

Edited By Michael Gilligan on 04/07/2020 22:21:40

When you get my reply you will see I actually received a 4 megapixel image, MS utlook offers me various save formate, JPG, TIFF, PNG, GIF and BMP.

I would say that only the 'large'; option will give me an image I can use.

It comes with no name or any metadata and no filename.

I'd suggest Mac users put their photos (with meaningful filenames such as photo1, photo 2 etc.)in a zip folder and email me that or send them via wetransfer.

(Also two heartfelt pleas to anyone sending photos: Don't edit numbers or letters into your photos and please supply a list of captions with your article NOT as the filenames!)

Neil

05/07/2020 22:14:50
Posted by Michael Gilligan on 05/07/2020 07:21:33:
Posted by Neil Wyatt on 04/07/2020 20:31:22:

Also there's no way to access a Pages document without Pages

.

dont know

Try this, Neil : **LINK**

https://kb.mc3.edu/article/31/how-to-open-pages-file-using-microsoft-word-872.html

MichaelG.

Yes, that's the process I described above.

It can give you the pictures and the words, but as separate files without the formatting.

A simple metaphor - you sent me a cake, I got a box of ingredients and no recipe.

Neil

Thread: Equatorial Platform Build
05/07/2020 17:13:37
Posted by SillyOldDuffer on 05/07/2020 17:06:52:

A surfeit of talent. LBSC never ..

Look what he did do, basically took live steam and made it a hobby for everyman.

I'm sure he would have had a field day with new tech (and found plenty to heap scorn on!)

Neil

05/07/2020 16:52:44
Posted by SillyOldDuffer on 05/07/2020 16:11:15:
Posted by Neil Wyatt on 05/07/2020 15:44:58:

The Platform in action!

Very good! And all up and running quickly. Are you providing the musical accompaniment as well?

The guitar is my brother I did the bass and drum machine, a very long time ago...

Thread: We need Pi
05/07/2020 16:49:47

The great think about Pi is that after ten digits you can make it up and no-one knows you are bluffing

Neil

P.S. Georgineer - me too. I reckon it's all made up this equilateral stuff.

Thread: Equatorial Platform Build
05/07/2020 15:44:58

The Platform in action!

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