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11
New from Old / Re: The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20)
« Last post by awemawson on August 18, 2018, 05:53:08 AM »
Today the Post Man brought a mystery package from deepest Hampshire - odd - not ordered anything from there. Well my face split into a grin when opening it I found two 25 mm shank index-able lathe tools kindly sent to me by Pete W. - gosh Pete thank you so much - those will be extremely handy :thumbup:

 :mmr: :mmr:
12
Project Logs / Re: New Tractor Shed
« Last post by awemawson on August 18, 2018, 05:46:43 AM »
At long last I've managed to spread and level the 120 tons of 'top soil' - well slightly better than the sub-soil that I used for the build up ! And on Thurday raked it to a tilth, seeded it, and raked it again.

The weather was kind to me - the piles of quasi top soil had dried nicely in the recent very hot dry spell, so spread reasonably well,  and just as I was finishing the second raking - raking in the hand sown seed - it started to drizzle, which developed into a reasonably heavy prolonged bit of rain - 7 mm in four hours - absolutely ideal for the seed.

Now my arms are aching from the raking and (oddly) somewhat more from the hand broadcasting of 27.5 kG of grass seed - approximately a domestic dustbin full at 70 grams to the square metre. Why a dust bin - well I had three types of seed that needed mixing and it was slightly more than would fit in the bin!

It now needs to 'establish' and will probably be cut a few times this season, but I will leave it to probably early summer next year before I fence it to give the made up ground time to settle a bit.

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Electronics & IC Programing / Re: Nissan Leaf battery.
« Last post by PekkaNF on August 18, 2018, 03:24:03 AM »
I know that battery charge/discharge is very dependent on battery temperature. I don't know that battery chemistry, each has it's own quirks and often they are not intuitive.


I know that lead-accid batteries can be optimized for cold and low altitude or higher ambient temperature, but not both. I know that because sometimes our winters are that cold that battery is having a hard time cranking the engine and then it does not charge in first 10 Km, because battery is too cold. I need an external charger that charges the battery and warms up the engine when it is close to -30C, which does not happen often but there is one to three week cold period. This is where it gets weird: the startting battery does not give easily cranking current or take charge when it is cold, on the other hand it does not seem to loose charge that fast either. The external charger has temperature control and is located close to battery, it charges with somewhat higer voltage on winter than on summer.

Pretty sure that OP observation is least partly caused by battery temperature induced.

Pekka
14
How to's / Re: Grinding the jaws on my three jaw chuck
« Last post by awemawson on August 18, 2018, 02:42:38 AM »
Thanks Pete

That wasn't the source I saw, but it explains a lot!
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Project Logs / Re: Chester 626 riser block
« Last post by John Rudd on August 18, 2018, 02:21:10 AM »
I made a riser for my mill.
Be careful of the dimensions on the drawing....I found them innacurate. I took my measurements direct from my mill, it fitted perfect first time.

I used studs for the top section.
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The Water Cooler / Re: Experimenting with a pulse generator
« Last post by Doc on August 17, 2018, 10:00:02 PM »
I had a comment that it looked like the motor was harder to start with the pulse unit. So I did a short little video oof starting to let you be the judge.



17
Tools / Re: Unknown bandsaw.
« Last post by russ57 on August 17, 2018, 08:41:06 PM »
When I got my s/h bandsaw, the seller proudly advised it had been 'setup' by 'an expert' and that it would need no adjustment to be perfect.

I found the 'expert' had decided that the bearings could not possibly be correct, bearing on the face, and had managed to adjust so they pressed on the side of the blade.
Along with the blunt blade, I'm not sure it could have cut through a piece of paper...

The seller was apologetic about the quirky 'tap handles' used instead of the 'proper' knobs.

Russ

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Electronics & IC Programing / Re: Nissan Leaf battery.
« Last post by russ57 on August 17, 2018, 08:33:27 PM »
I would think aircon use would explain that. Heating can use some recovery from the motor.

My outlander phev shows an instant electric range drop of 10% when the a/c is turned on.

Obviously dependant on climate...

Russ

19
Electronics & IC Programing / Nissan Leaf battery.
« Last post by DavidA on August 17, 2018, 06:29:25 PM »
I was looking at an article on the Battery life of the Nissan Leaf, and the following opening remark struck me as a bit odd.


A Study on Real-Life Nissan Leaf Battery Deterioration
by Erin Yurday

The new 40 kWh Nissan Leaf has a real-life range of 170 miles (160 miles in summer and 180 miles in winter). But how does this range change over your first few years of car ownership?

How can the car have a greater range in winter, when I assume the lights, heater etc are used more, than in the summer ?

I wasn't sure where to post this snippet, any mod feel free to move it to somewhere more appropriate.

Here is the link if you want to read more.

https://www.nimblefins.co.uk/nissan-leaf-battery-capacity-range



Dave.
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Radio Control Models / Re: State of the art 3D printed RC yachts
« Last post by Joules on August 17, 2018, 06:29:11 PM »
That didn't take long, the ballast was 7 UK pence.  The translucent hull was very useful for seeing the waterline.

7 pence weighs 18 grams.

And, the hull is watertight.
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