Stub Mandrel

1 hour ago, Gina said:

Swapped motors and got a similar result except both X and Y drove the Y positively.  The NEMA23 Z motors are out for delivery and the couplers have arrived.

Sounds like one motor may be reversed?

I notice one is 'upside down' which would reverse the sense of direction.

Try unswapping them then flipping the connector on one stepper

Rapid prototyping...

Toughened glass or borosilicate glass?

Experience with machine tools suggests that for best accuracy bed levelling should be as rigid as possible and be a once in a blue moon (or less frequent) operation). Get it right, then leave it alone.

I bet it's fixable. Those resistors are just 0R links and the caps should have survived. That corrosion needs cleaning off though. I bet the transistor is all that needs replacing at most.

Excellent prints and design!

Puts my basic (and so far unused) dome to shame.

What camera are you using.

Which version of the ultimate camera is this? <ducks>

Bear in mind a typical hose end has a 'mushroom' plug in the end. By moving it in and out you get everything from a wide cone to a narrow jet, so an adjustable gap might be the key to getting this right (and keeping the flow rate up and pressure down).

I see some experimentation with holes sizes and angles ahead  - ideal subject for 3D prototyping!

1 hour ago, Gina said:

I don't want hedgehogs getting in it

I've seen a hedgehog with a cyst so large it only had the use of three legs climb up the front of a bookcase...

Cripes Gina, I would think twice  before just lifting up oner end of a slab that size!

Please take care we don't want you to be buried under one of those!

Or offer the local wildlife  volunteers an opportunity to create some new wetland habitat...

makes sure any pump doesn't pull  water from too deep in the pond, then if there's a fault it can't pump it dry ?

Make a small bundle of barley straw, about half the size of a brick. Tie it up and weight down with a stone and it will stop algal blooms.

Wildlife garden ?

? I meant buy a roll or two of turf...

What about just using lawn turf?

Clay? No excuse now, dig a huge hole , line with the clay and puddle it by borrowing a neighbours herd of cows and chasing them round and round  ?

More seriously, good luck and I bet you are pleasantly surprised by how fast the wildlife arrives.

I got my pre-publication copy of my 3D printing book today.

Do you recognise this in figure 1.11?

8 minutes ago, Gina said:

I could print a teapot   But although the hotend will be used at up to 300°C I don't envisage it producing boiling water!   It could, of course but...

Yo didn't recognise a 'Utah Teapot'?

What's the point of a 3D printer if you can't make tea with it as well?

Jocular - Scottish Eyepiece.

<I'll get my coat>

I'm no EAA expert but I love the interface design!

When the sun is low, you get a green-blue  belt above the horizon, presumably the moon makes the same effect but much fainter, and perhaps that's what you picked up?

3 hours ago, RS buckell said:

I simply can't get it to point accurately since the three mounting screws that come with it are essentially random when tightened up, thus throwing it out every time.  Did you have this issue or am I barking up the wrong tree?

Pardon me for butting in, it sounds like you are tightening the screws right up. You should use the two screw adjusters to move the scope to the right place, while the third, sprung, support stops it from flopping about.