I actually don't know the output voltage of my power supply. I did a bunch of research on it years ago and then pretty much forgot everything -- had a kid... I know it's current is way too low -- about 1/3 of what it wants to be. The drivers are Gecko 201s. One thing I think I remember is that if I add current from the power supply, I'd need to change the current limiting resistors on the Gecko drives.
Anyway, you got me all fired up. What started me back into metalworking was a do-over on the X gear box I remade years back and which f-d up. I had everything ready and last night I put it all together. Accurate to 1 thou as far as repeatability on steps. When I was talking about cut accuracy yesterday, I was talking about what I was really seeing in terms of cut errors since there's plenty of flex in the system. So, bit going to fast, head moving too slow, a little looseness, etc. and I can see the errors before I measure with calipers. I used to make guitars as a hobby and that makes you good at spotting small errors.
Look forward to e-chatting more on this.
System specs FYI:
PracticalCNC table. Basically the ponzy scheme of the CNC business in 2005. Oh well, I own it... It's 80/20 with gear drives on X and Y and an ACME screw on the Z. 250oz/in Powermax motors.
Controller Software: WinCNC which is actually a nice controller.
Other software: Visual Mill, MeshCam, Rhino CAD, and whatever that cool cheap 2D toolpath software was that came out in 2005 and which is still really popular -- I forget the name.
--- In GrizHFMinimill@yahoogroups.com, "g_liming" <g_liming@...> wrote:
>
>
>
> If you want to cut steel, its a whole different ballgame. The rigidity required goes up with depth of cut and with how much acceleration you set the machine to, so you can cut anything if you're willing to make enough passes - but hey, that's why you built a robot to do that. On 6061 aluminum, I usually use a DOC of .050 or so and use a .125 in single flute "O" type cutter made for routing aluminum. As long as making 100s of them isn't a requirement (like on the production machines you mentioned), you can finesse a lot of things.
> Happy to answer questions. What voltage is your supply right now?
>
> BTW, I fumbled the shift key before. Its www.liming.org/espcopter
> and www.liming.org/orrery
>
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