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Project Logs / Re: Chester 626 riser block
« Last post by John Rudd on August 18, 2018, 03:12:12 PM »There is no need to bore out the centre of the riser block....just machine where necessary to make it fit the column/head
Recent Posts
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Project Logs / Re: Chester 626 riser block
« Last post by awemawson on August 18, 2018, 03:02:57 PM »If anyone needs a riser block for a Bridgeport I've had one on the shelf for years intending to fit it but never have and probably never will! Actually I had two and the other one went to John Stevenson (God rest his soul) when he had a tall job to do
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Project Logs / Re: Chester 626 riser block
« Last post by Markfd on August 18, 2018, 02:54:41 PM »I forgot to say, I meant studs (with captive nuts at the bottom) that go right through the riser to avoid milling out pockets.
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Project Logs / Re: Chester 626 riser block
« Last post by Markfd on August 18, 2018, 02:51:55 PM »I know about the dimensions, the drawings are quite old & my mill is new. I shall measure mine carefully before machining. It just seems a lot of extra work to bore out the centre for no apparent benefit. Does anyone know what size of block can be used with the existing z axis screw. I would raise the cap head stop on the column to prevent disengagement or damage.
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Introductions / Re: Hi from Bolton UK.
« Last post by cnc-it on August 18, 2018, 08:08:02 AM »Hi Ade that sounds like a project and a half..thanks for the offer..I'm similar to Andrew though..101 jobs to do and not enough time 
I will read your thread..looks a great machine
I will read your thread..looks a great machine
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Project Logs / Re: New Tractor Shed
« Last post by Pete. on August 18, 2018, 06:13:36 AM »You'll be playing cricket on it next summer 
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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 
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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.
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
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
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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!
That wasn't the source I saw, but it explains a lot!