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Yes, I bought the height gauge and optical centre punch for this project and I've been suprised at how accurately you can do things - I reckon on smaller pieces the max error isn't much more than +/-...

Here you go:

https://www.ebay.co.uk/itm/Aluminium-Yellow-Chromate/152851887537?var=452590243278&epid=9012428881&hash=item2396aeb5b1:m:mmoXzHT-fHBXPysBtCp9FLw

Why they still have it on the bay...

Thanks for that Mike, but I really wanted a simple chemical passivation process (i.e. just dip it) rather than some kind of painting. BTW, I'm just over the hill from you in Broughton, nice to find...

Aye that's the thing I found, but it seems to be for zinc plated items rather than for ali.

Thanks for the suggestion of Frosts - I'd forgotten about them. Sadly although they do a very interesting electro-passivation kit it's only for zinc :-(

FY! a charge pump is an electronic circuit that's usually used to generate a low-ish power but higher DC voltage from the existing DC supply using capacitors, rather than an...

I feel that I'd like to passivate some of the internal parts of the machine as experience tells me that stuff will slowly corrode up here in the damp Lakeland climate (we're not too far from the sea...

I've been cracking on with stuff the last few days, here's a pic of some of the parts:
25691
From LHS clockwise we have Z axis slide with clamp sitting on top of the bed cross beams, front bed end...

At least the brushes appear to be easily externally accessible - so easy to change I would guess.

Do those motors have integral brakes? If not, you might need to add one on the Z axis if you're...

Aye, they're the things - a lot cheaper on Aliexpress though! When I get my machine finished I'll bum a bit of hardwood off Mike and see how smoothly they cut it.Theoretically I can't see that there...

Yes, something like that, though if it were me I'd have tall side rails fixed to the base all the way along rather than perched on blocks - that way they add good longitudinal strength which will win...

Your requirements are not a million miles away from what I want to end up with, except mine will be used for building high-end loudspeakers rather than guitars (hence needs to be a bit larger); I've...

All the above is sound advice - all I'll add is to make sure the metal part is properly degreased, otherwise adhesion won't be great.

I've got most of the pieces machined up now and waiting for the dozy anodisers to do their stuff on some of the beams - whilst it's obviously a home built machine I wanted it too look vaguely OK and...

The oriental numpty farm is obviously still going strong.... just be thankful that live and neutral weren't swapped at your workplace.....

That's my experience too on small orders.

Another warning though for larger orders or when sent via courier: ALWAYS make sure that the vendor includes the shipping cost on the commercial invoice....

It all seems to depend on what shipping method is used. Typically for stuff coming by the big carriers (Fedex, DHL, UPS etc.) it'll be 4 to 5% duty, a handling fee of between £10 and £15 and then 20%...

Yes, certainly keep the earth running through, it still has some safety value and will likely help with interference supression as well. And you'd only need a very basic 230V: 230V (or 230V : 2 x...

Incidentally, if it is simply a leakage matter (sometimes caused by a slightly wonky interference filter on the PSU input), adding an isolation transformer will often cure it.

Which controller is that may I ask please?

As long as you set the current limit on the drivers correctly, it didn't ought to be a problem. OK the current will rise quicker, but the peak current should be the same as it would be with a lower...

It's not that people don't want to help, in many cases it's down to not being in a position to give a full balanced view on a machine: to do that honestly & responsibly (i.e. not blabbing your mouth...

That's quite a tough one in my experience, not only do you need an adhesive that will stand the temperature and cleaning agents in the dishwasher, but there's the differential expansion between the...

I've no idea how you'd do it with that sensor, but normally my approach for vibration analysis is to sweep the stimulus frequency (i.e. motor speed in this case) and record the sensor output vs...

Tecsound is good stuff, but to get the best of it DO face the side that's not stuck to the extrusion with some metal foil or thin metal sheet, this gives the "constrained layer" effect where bending...