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adamharman

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    Amateur theatre practitioner
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    Maintenance / Building Services
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    Adam Harman

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  • Location
    Cornwall

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  1. The 4th photo is quite interesting, the one showing the steel column with the beams fixed to each side. Left hand beam has a welded end plate which is bolted to the column and is also supported on a fairly heavy piece of angle which looks to be bolted to the column. This is how it should be done Right hand beam is fixed to the column by ????? Timbers look like 6x2 in that photo, which wouldn't be enough for the whole (5m ish?) span, but probably fine for half of it. Looking at the first photo, there's a steel column which changes paint colour where another beam may have been attached to support the mezzanine. I'd say there was a steel beam supporting the centre of the floor, with the timbers set into each side of it, and that steel dropped rather than the timber snapping. Sizes of timber and steel appear to be about right, but whoever did the job had no experience with structural steelwork and tacked it together with a small DIY welder.....
  2. Not specific to the 305HP, but this covers a range of MAD products including the scans: http://sabretechnology.co.uk/pdfs/madmanprint.pdf
  3. If storing / transporting isn't an issue, 2x 3m is likely to be a bit cheaper than 3x 2m
  4. Interesting, I wouldn't be worried about connecting any sort of load to that. Would it be possible to add a small capacitor somewhere to smooth out the drive signal completely? That mains waveform is attrocious. Are you sure it isn't a limitation of your scope....
  5. Another option, if you want control without using the triac to directly switch the output might be to add some contactors. Set the channels to switched on the processor, and use the outputs to feed the contactor coil. I know it's possible to fit additional MCBs onto the power blocks in the gap between the existing ones so rail mounted contactors should fit. The plastic covers are all identical so the centre one has the mcb positions ready to cut out,
  6. If you don't need contol, thats very easy to do. Assuming all LD90s were the same, they're double pole MCBs so you can just disconnect the wires that fed the dimmer PCB and put the load wiring straight in. All the zero point sensing etc is done by the processor module which has it's own feed from the incoming supply. The ribbon cable from the processor to the dimmer blocks just feeds into the opto isolators on the dimmer PCB, there is no direct connection to the mains side. I'm fairly certain that even if you unplugged the ribbon, the processor won't notice the difference.
  7. you'd need a couple of 8 pin plugs and a little bit of work but this is cheap for a demux https://www.ebay.co.uk/itm/303560770273
  8. Applied on Saturday and it's showing as a pending credit on my account for tomorrow so very efficient. Lucky I've managed to keep working to some extent though, as the way it's calculated works out very badly for me. It's averaged over the three years I spent building my own house (funded by selling the old house) and only working a couple of days a week so income was very low. Now I've finished the house and am working 6 days a week again I'm obviously earning 3 times as much but have a lot more bills to pay! Fortunately I'm primarily a builder with a small sideline in temporary event stuff so there is still work I can do. If it was the other way around I'd be screwed trying to survive on 80% of a third of my income!!!!
  9. They're only allowing so many applications per day, on a day allocated according to your tax reference. I've got to go back on saturday to do mine so no money until the week after next if its 6 working days......
  10. I've used the Square app successfully on cheap second hand phones (no sim, just on wifi) and tablets with the card reader glued to the back. You can get an ipad3 or ipad mini on ebay in reasonable condition for as little as £40, plus £30 for the square card reader. If you don't need to print receipts thats an economical way to do it. If you need a receipt printer as well, you may as well buy the square terminal and get it all in one for a little extra money. I suspect the square terminal is basically just a generic android phone in a case with the card reader and receipt printer, no need for them to reinvent the wheel and make it all from scratch.....
  11. As one of the machines you've linked to is a vertical panel saw, I assume you've only cutting sheet materials? In which case you don't need an enormously powerful motor - 3kw (as the vertical one in your link) is plenty so I'd be looking for a single phase machine.
  12. They might not provide much direct heat at low level, but if the air at the top is hotter than the air at the bottom, there'll be less convection so any heat at low level will seem more effective. I'd imagine the roof is fairly dry though which is a useful side effect.....
  13. They'd probably need a new heating system as well if they went LED, as they presumably don't need much with 84kw of halogen lamps......
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