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And me!

I think most people recommend you mark a square rather than a triangle and check if the diagonals are equal in length. I recently did this by using a 22.5 degree engraving bit to mark the...

That's a really interesting base design, I've been wondering about a concrete or block base myself in the future as a cost-effective and very rigid structure. I'll be interested to follow your...

You need to get out more....Oh, sorry!!

Nice piece of work, and it ain't going to break again.

Other way round! NC will normally be at ground voltage (Normally Closed to ground) until triggered. "Normal' means you have NOT driven the machine to it's limit and it is continuing to cut material...

Rather than continue hi-jacking Joe's thread I thought this belonged here:
Thanks to Jazzcnc sending me the g-code I can now apply for membership of the Aztec Club. The result is 400mm in diameter...

You then have to choose what measurements you need to make and instruments to buy in order to set those adjustments correctly. There are a lot of worms in the can but you learn a lot too.

Some results! Numbers are to 2dp to avoid going way off for calculations but in reality there is some interaction between the effects of different errors and I will need another set of measurements...

Here's a quick video showing how the measurements are made...

https://vimeo.com/414191935


Any difference between measurements on the two wires means the gantry is leaning forward or backwards...

If you can't build it precise, build it adjustable. Regular readers of this forum and anyone who has tried to build a machine using only a drill press and hand tools understands the significance of...

That's brilliant! You must be walking on the moon.

When I first built a small desktop type machine a few years ago I had no idea just how flimsy it was in truth. It's only with a little experience that you realise how substantial a machine needs to...

That's about it. just two pieces of 50 x 100 welded together to give 200 x 50. The whole is then welded to the gantry uprights.

Bear in mind that this gantry was the first time I ever tried...

I know you are designing on the basis of 50 x 50 material but rather than the complexity of the braces in the designs above have you considered two pieces of 100 x 50 welded together to give a flat...

Nice work!
On the cooling front I found that larger diameter piping (8mm instead of 5mm I think) doubled the flow rate from the same pump. Short restrictions such as the inch-long pieces that...

27868

True that it will never do auto-squaring but it's still where you have to start in order to then upgrade to 2.8. My recommendation is to do a clean install of LinuxCNC and use the...

Still the Beta v2.8 for auto-squaring. They're still developing v2.7 as the main thread even though the beta version is actually quite stable, though fundamentally different under the bonnet. Might...

This thread will help you with this bit:

http://www.mycncuk.com/threads/12687-Auto-Squaring-with-LinuxCNC-v-2-8

That's my kind of control box!
There are loads of designs for wooden joints that are designed not to have sharp corners so you can cut then on a CNC machine. Some nice examples at the link below....

Embarrassing but I must own up: I realised during my tests that for all these years I've left the 36V supply for my stepper motors floating. Neither rail was grounded so the whole supply was bouncing...

You're the man then! I like the idea of bendy concrete made with old tyres :excitement:

Doddy,
Agree with everything you've said. Though common sense isn't as common as we'd like it to be!

I was concerned that some readers trying to grapple with this stuff for the first time could...

Doddy,
We're obviously both talking at once!

Re the use of capacitors, the time constant for a .47uF cap and a typical 10K pull-up resistor is 0.47 mS, so a delay of about 1mS will result when...

A little knowledge is a dangerous thing. Sometimes you really do need to make the effort to understand the subject correctly. Read the information in the first page or two of the link I gave in post...

Every answer raises two new questions. You'll have to get used to it I'm afraid!

There are plenty of sources of transformers. Have a look at RS Components for example. Even if you don't buy from...

#1 Router
#2 X,Y As much as will practically fit onto #3. Z 60mm max.
#3 1m x 1.3m
#4 Benchtop (I'll need to move it a long way soon-ish)
#4 Plywood, hardwood, some acrylic