CNC Router V1.0 (For Cutting Multiple Materials)

[JAZZCNC]

Is anyone able to answer any of the above? It would be great if there was a link for the red router listed?

Cheers,

Dave

Again it's one of mine Dave and no build thread as these where built by me for someone off forum.

[biketrialsdave]

Again it's one of mine Dave and no build thread as these where built by me for someone off forum.

No problem JAZZ. I'm currently making some changes as we speak. A few questions are now arising:

1. What pulleys do most people go for? XL? Not sure on pitch etc.
2. Is there a way of extending motor shafts so that I can overcome this problem below?


3. Is 10mm of motor mount adjustment enough for belt tensioning?



Some progress on the Y axis too:

[Wobblycogs]

What most people do is rout out a recess for the stepper to mount in so you've got only maybe 5mm of material where the stepper sits (see here). That way you generally get enough shaft to mount a pulley on directly without needing an extension.

I don't think 10mm of movement will be enough for tensioning, especially not on a long belt. I'd go for more like 25 or 30mm if you can.

[JAZZCNC]

#1 Use 15mm wide 5mm pitch HTD pulleys and belts.

#2 Need extensions made on lathe but much easier to use BK/BF bearings inot profile and belt/pulley like shown in my picture on other thread.

#3 20mm slot.

[biketrialsdave]

Tonight's updates:



Still not 100% sure on the way I have attached the "end plates" as seen below. I.e. using 5mm steel plate welded to the box section and tapped with two M6 threads.

[Wobblycogs]

The stepper in the first two pictures looks large for the size of machine you are building, are the 34s? I would have thought 23's would be enough for a machine of this size, especially if you have slaved motors.

The connection between the gantry screw and the top plate (third picture) looks like a weak point. I'd try and make it thick enough that it covers most of the body of the ballnut.

[biketrialsdave]

They are 23's. I think the model I am using has a particularly long body.

I agree with the ballscrew mount. Could make it 20mm plate (from 15) or increase that joint some other way...

[biketrialsdave]

Not touched the mechanical design for a while as I got distracted down the route of designing my own stepper driver...

So here's a small update. I'm feeling quite bad for how much this is looking like one of JAZZ's machines! Believe it or not I am not trying to copy you Clive!

I am still not happy with the way I have the Y axis plates attached to the steel box section. Think I need to come up with something better?...