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Hi,

I'm hoping to get a look at the I_CAT.ini file for a Datron M3 or similar machine running CNC V7 on Windows. I've got problems with my spindle and I think it is because the previous owners...

Not from me at least, I lost interest, possibly because I don't need one.

If I were to build one, I'd use the avago encoders, some decent bearings and a Parallax propeller microcontroller linked...

Sounds excellent, I've been into CNC for a while but have more components and unfinished projects than I do machines but I'm working on it.

Graham

That's me :) Strange, I recognized your name, I assumed it was from the CNCzone but now I remember otherwise.

Graham

p.s. "why reach for speed" would sound better

But that does not matter because assuming he does not want the precision of the machine to scale down too then a smaller machine will be easier. I would rather cut something to 0.01mm when it is...

You could use a small wood lathe less motor (ebay) to provide a head stock and tail stock. You then need to couple a stepper motor to it via a reduction drive. The best sort is a harmonic drive as...

Thanks, that does seem an excellent idea, nice machine too.

What I'm worried about is that if the machine spends most of its time cutting sheet is seems that I'll have the router hanging out miles...

A wonderfull read and an excellent machine. I started to feel increadibly inadequate over how well you handle the MDF and the excellent finish you have got, when I then noticed you are a cabinet...

I have a z-axis with a travel of 5", I'm struggling to decide how high above the bed to make the gantry, greater than 5" sounds like a good idea to allow for clamping etc but how much more. I'm also...

Sorry about not replying sooner.

Clamping can be an issue as it can even on flat routers, its always best if parts are not free when cut out so I'll definitely be looking at vacuum beds as well as...

I think you might have had too much of the beer from those smileys, you called it an encoder shaft 5 times! :)

Glad you got it sorted out and I hope "spot on" is good enough.

Graham

And please don't even think about boring out that shaft without a lathe.

The encoder is on the other end of the motor, i.e an optical encoder that gives feed back to the origional motor controller.

What you are showing is a disassembled planetary gearbox.

The...

Or hold rod in router collet and mount a lathe tool on your bed a voila a CNC lathe.

Graham

cxixer,

I tend to draw things and then move them to the top of stock is at zero in z and the part is negative z. But its all relative as long as the height of the tool at zero matches zero in the...

I'm guessing you mean can't mill until...? Because if you don't have a lathe you can't drill out the shaft.

Here's an even more daft idea, take the encoder of the globe motor and couple your...

Turn some bar, bore/ream to match stepper shaft and mill a flat on each side. Glue into gear.

Graham

Hi,

I've got plenty of other projects on at the moment but the two long stages in this picture appeared on ebay disguised as a pick and place system (along with a load of pneumatics) and I picked...

the microcontroller just drives the gantry by syncing the stepper motor with the rotation of the origional feed motor encoder, this means that the origional print engine is still doing all of the...

repeatability is getting better:

http://www.youtube.com/watch?v=IOT8bHff80k

Heads:

When not in use take them off and put them in a tupperware box with wet paper towel. To clean wipe on a...

its printing on to a piece of A4 paper, that's about the same size as US legal.

Graham

Just noticed the thread on pcb printing thought you might like this:

http://www.youtube.com/watch?v=a14zELKPw8M

I'm working on a 3D printer in the Zcorp style.

Graham

You need very high resolution encoders, say about 50000ppr after quadrature, you can't use steppers as encoders!

Avago (was agilent) do some nice 16bit absolute encoders that could be used.

The...

New bulb?

A sinker EDM would be fine especially if just taking a light cut and cleaning the corners.

Graham

perhaps create a special tool holder that has a shoulder to press on the casting of the spindle so you can sleep sound at night in the knowledge of your superior bearing care.

Graham

I'm suprised there hasn't been more interest, we are talking a 16bit absolute encoder for hobby prices (at the 15 off price). That's over 65,000 points per revolution and not only that all the...

It was, the problem is basically that to prevent severe warping during the welding the steel used would need to be thicker, I struggled to lift it as it is so that wasn't an option for me. I got it...

I thought I should post that my router bed ended up being scrapped. The workshop in which I was building it had to be emptied and it was too heavy to get into my attic (via the spiral stairs) it...

you could control this machine by implementing the equations feature in Mach3, see:

www.indoor.flyer.co.uk/kinematics.htm

look at the pdf file, I show how to use the equation for a different...