more cnc Q.

I'd stick with what Hoss recommends or uses, I've followed his recommendations and had no trouble what so ever, so have a lot of others. It is possible to have a stepper that is too powerful and have power that never gets used. There is a few guys using 425 oz/in steppers on a G0704 type mill and seem to be quite happy.

What you may want to look into is the various power curves for each stepper, work out or maybe ask around what cutting speeds WOC & DOC an X2 is happy with and go from there.

If memory serves me correct one or two of the docs on the gecko drive site touches on this subject.

I've seen "self styled experts" suggest stepper motors for the Z axis on a mini lathe in far excess of what I use on the Z or X axis on my mill.
 
my mini mill seems happy with light cutting. it does not do well with any sort of heavy milling due to low rigidity of the design.

i dont really want to go with a premade screw kit because machining and building one off stuff is what i like to do, even if it is not the quickest easiest way.


for some reason the mini lathe guys seem to think that the head weights several tons and needs a serious power plant to lift.



i do plenty of manual milling at work so i want a nice little cnc for my home projects.
 
Here is the stepper you need to drive your mill.:rofl: Just unpacked this one, I bought it for a project that I'll post later. 4200 in-oz NEMA 42. About the same locked rotor torque of a 3HP induction motor.

That's a NEMA 23 stepper sitting on top of it.

IMG_0479.jpg

IMG_0479.jpg
 
JimDawson said:
Here is the stepper you need to drive your mill.:rofl: Just unpacked this one, I bought it for a project that I'll post later. 4200 in-oz NEMA 42. About the same locked rotor torque of a 3HP induction motor.

That's a NEMA 23 stepper sitting on top of it.

View attachment 93513
Click to expand...

This reminds me, I have three nema 42 steppers the same diameter and half that long that do 2400 oz-in. I'd be willing to sell them to somebody CNCing a full size mill.

Make an offer.

Karl
 
Newegg sent out an email today and they have a lot of options for refurbished computers. Here's one that looks decent at $190 and another at $90. Both have parallel ports. Here's the link to all refurbished results that are $50-200.
 
I'll mention I've had GREAT success with compac/HP D530 computers. Very cheap on fleabay.
http://www.ebay.com/sch/i.html?_odk....TR12.TRC2.A0.H0.Xd530+&_nkw=d530+&_sacat=179

I stick with one model for all my CNC machines. Then i can just clone the HD and put it on another computer. If i suspect ANY sort of problem, a complete brain swap takes just a couple minutes.

Karl

PS I'd buy this for $50 total if i needed one today
http://www.ebay.com/itm/HP-Compaq-d...204?pt=LH_DefaultDomain_0&hash=item2349c56f44
 
Karl_T said:
I'll mention I've had GREAT success with compac/HP D530 computers. Very cheap on fleabay.
http://www.ebay.com/sch/i.html?_odk....TR12.TRC2.A0.H0.Xd530+&_nkw=d530+&_sacat=179

I stick with one model for all my CNC machines. Then i can just clone the HD and put it on another computer. If i suspect ANY sort of problem, a complete brain swap takes just a couple minutes.

Karl

PS I'd buy this for $50 total if i needed one today
http://www.ebay.com/itm/HP-Compaq-d...204?pt=LH_DefaultDomain_0&hash=item2349c56f44
Click to expand...
Hi Karl,
I am also shopping for a pc to run my CNC mill project, this is one being considered:
http://www.ebay.com/itm/321497867225?_trksid=p2060778.m1438.l2649&ssPageName=STRK:MEBIDX:IT
I'm attracted to its very small size, It doesn't have a parallel port but I don't think I'll need one as I'm going to use a Galil 2240 motion controller that uses RS232 or ethernet. Am I on the right track or do you see any pitfalls I am not aware of?

Thanks

Ed
 
Eddyde said:
Hi Karl,
I am also shopping for a pc to run my CNC mill project, this is one being considered:
http://www.ebay.com/itm/321497867225?_trksid=p2060778.m1438.l2649&ssPageName=STRK:MEBIDX:IT
I'm attracted to its very small size, It doesn't have a parallel port but I don't think I'll need one as I'm going to use a Galil 2240 motion controller that uses RS232 or ethernet. Am I on the right track or do you see any pitfalls I am not aware of?

Thanks

Ed
Click to expand...

I'm not so sure of this one. These types on minis have a tendency to bottleneck, especially running windows. If your streaming to a caching controller, (do the Ethernet controllers cache?), this would probably not be a problem, though for modest increase in size, I would think this one mentioned before would be a better machine for the task and leave the option for parallel port intact.

Mark
 
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