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Take a look at Wade O's design on youtube, it's brilliant and I think you'll see the brilliance of his X axis stepper placement, inside the tube! https://www.youtube.com/watch?v=herMY_2WowM

Has anyone tried repurposing a cast iron table saw top for a table? Hmmmm. I think the idea has merit. Anyone?

Ah, I see you already addressed the long Y bed issue.

Smart, making the rear support go to top of gantry!

If I might add, your bed, the long'ish 2" x 2" spans, will be a weak point. Maybe a tried and true truss, only upside down, on the bottom of...

:eek:

https://youtu.be/SwHb75_GWwM

Oh, there is definitely movement. I think these guys, I assume they're guys, are trying to get me to empirically support what I'm seeing and to get a baseline of data so that after in "improvement" I...

OK folks, table top 70lb postage scale in hand. Watch me now! Thanks for the hot tips. I'm just doing one little upgrade, a 1/4" steel plate on top of my bed aluminum (al-yoo-minee-um for you UK'ers)...

Hmmm, skrubol, how would you measure force? I have a small gram scale (don't get any ideas) but I don't think the range is high enough. A bathroom scale maybe, but that would not be very accurate....

It's not a good idea to make an aluminum cutting mill out of aluminum. It's the same reason we don't feed chickens to chickens.

Hello skrubol,
Yes! I'm on it. I have a few dial indicators and use them to calibrate the machine in other ways, but it hadn't occurred to me to use them for this purpose. I have a sweet Federal...

Yes, if you watch my video, you'll see that we may be barking up the wrong tree trying to make this c-beam mill metal. In the next few days I'll post another video showing how my CNC performs after...

Thanks for answering so quickly Mr. Wizard. Agreed, I think eventually I'll just go to steel. I'm trying to decide what thickness and size of x-axis to span about 750mm. I figure that 11 guage (1/8")...

Hey folks, I built the Kyo Sphinx with a bit wider X-axis and am struggling with rigidity. Fine for softer woods and acrylic and I can mill aluminum, but not well. I've started down the path of cost...

Hello,
It looks like you have two c-beams stacked? Based on the fact that your x-axis is so short, I think you'll be plenty rigid for hardwood and some light aluminum work. If I were you though, I...

This is an old thread, but I was also trying to find info on making an aluminum extrusion CNC machine more rigid. I've added hardened steel v-track and bearings to the Z-axis for a reasonable cost...