Search:

The C rating is the amount of radial play available when cold - C1 is the least, C5 the most, C3 is in the middle obviously and seems pretty common. The reason for the larger play is to allow for...

I'll have a go - means I'll have to measure that one though! Might be a week or two as v.busy at the mo.

Aliexpress seem to have a very cavalier attitude to compatibility with their website, A couple of times I've had them change things without any kind of warning and find next day I can't...

Like Doddy, two areas of interest:

Chunky stuff
#1 Mill/machining centre /whatever
#2 X,Y, Z : 500x250x200
#3 0.9m x 0.8M x Z=??
#4 Bench-top
#5 Ali, brass, mild steel. composites
(nearly...

+1 Perhaps Microsoft (mighty offenders in this area) could do with some Yorkshire wisdom!

How about a variation on "C", bring the 2 80x80s close together (ditch the crap collecting gap) and plate them front and back to make say a 90 something x 160 section? You could even slip a drop or 2...

+1 for ali backing plate..... not just easier to drill (especially "emergency" holes! ) but can be useful for heatsinking drivers, rectifiers and braking resistors etc. I successfully cut 60/75mm...

I JUST managed to squeeze everything into 15 x 30, but it did require a bit of laying in to make sure stuff wasn't crossing over anywhere.

They ought to if they want to have any chance of meeting the relevant regulations! The circuit in question is a thing called a PFC boost converter, these are used on the front end of most high power...

If it were me I'd run the enable, pulse and dir. signals as twisted pairs - common the -ve ends up at the Arduino. This approach gives much cleaner waveforms and better resistance to interference.

A large thick-walled aluminium box section can have considerable rigidity and weight-for weight won't be a long way off steel, however it won't have the torsional rigidity to cope with the sort of...

Personally I wouldn't connect the screen at the spindle end - it's for screening the cable, the no.4 (E) connection is for earthing the spindle casing. At the VFD end you twist the screen and the 4/E...

0.75mm2 ought to be OK, the tables I've looked at give it a current rating of 12A @ 30deg ambient which even at 220V is enough if the power factor is anything like reasonable. Farnell do...

Reasons toroids are potted in a plastic case include reducing audible hum (potting compound locks the windings solid) and because they may look smarter! - important for HiFi. To do it properly you...

Aye, my sympathies are with you too lad - I had to dismantle and clear my father's workshop around the beginning of the year and as an engineer myself it was a hard thing to do. Best of luck selling...

You should also take a look at these spindle motors:

http://www.jian-ken.com/

probably the best engineered stuff I've seen come out of China

No I haven't - it was just the first such item of a suitable spec. that came up in a search! There's loads of such things available for sub £100, if it were me I'd probably get one from someone like...

OK, then looking at the front panel I guess for constant voltage you turn the current knob way up and set the voltage, and for constant current you turn the volts all the way up and set the current....

Under some circumstances you (or more correctly your PSU if you've set it to constant current mode) will only be able to push the current to what the 720 rule suggests if you have some reserve...

It's worth checking your connections (with a DMM set to ohms/continuity) - one probe on the connection to the PSU, one on the workpiece. In my setup (I use sodium bisulphate) I'd be expecting about...

Hmmm, sounds odd - maybe post a pic of your bath and then perhaps someone can spot the problem?. BTW, how big is the part you're trying to anodise??? If it's small the current will be low anyway at...

It doesn't look too different from the one I've used with reasonable success, so I can't see why you should have any major problems. The only comment I would make is that I found 15V wasn't quite...

BTW, did you check the ballscrew for smoothness throughout its' length before mounting it?? As I mentioned in my thread here: http://www.mycncuk.com/threads/12524-gritty-ballscrews , although Fred...

With all the beams now anodised I thought it was time to indulge in a bit of damping, as handling the box sections in particular showed that they were ringing a lot at mid-audio frequencies (which...

Hey, you've got some tidy welding there! If you look here:

http://www.mycncuk.com/threads/1524-What-size-stepper-motor-do-I-need?highlight=stepper+motor+size

there's a very useful spreadsheet...