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What I do is click on the component I want to do CAM on and select "Isolate" (only available on Model view). Then I switch to CAM view and make my setup (I think it chooses just that component by...

I have a similar setup. I remember having to invert the polarity at the C10 board and then things worked

Since you know the parallel port output is ok (I'm not convinced, but you seem to be) I...

I had the direction problem with one axis once. It happened in the middle of milling a part and I'm lucky it was not the Z axis!

I didn't fully root cause it but I believe it was the PC or...

I'd be inclined to ship it back to them dissembled in several boxes. There's no reason they need it to come back fully assembled, it's going in a refurb pile anyway (I would hope at least).

That sucks, those are ground aren't they? Have you measured the parallelism vs the Z column when it's sliding over the ways? Also have you checked the flatness of the two sides of the Z slide?

If...

I'm curious, what makes this fly cutter "super"? I've got a cheap flycutter and haven't been able to get anywhere near that kind of finish with it. Is it the insert?

My thought is you think you don't care about speed until your CAM program tells you it's going to take 4 hours to mill something. For me at least that is 4 hours of keeping an eye on or at least...

Would be nice to only swap the spindle pulley and not both pulleys + belt. Looking at a belt drive calculator I guess a ~5" pulley would work fine. But it will need a different length belt,...

Any updates?

I was wondering... If there isn't room to stack pulleys to get two sets of gearing, is it possible to just swap the spindle pulley when you want to use a lower gearing? That just...

Was this to model just the weight of the head? I was more concerned with vibration from the cutting action. There's a lot of force at work when you're cutting something.

That's definitely the question. It's certainly no where as rigid as a solid block.

Was this actually that much cheaper than a solid block? A solid block would be what, $30?

Yeah, but if I want to run something big like a flycutter at low RPM you're giving up a lot of torque vs the stock low gear. Is there enough room to stack another set of pulleys like the Hoss belt...

This is awesome. 3D models would be more useful than Gcode, but those drawings are all I need.

I didn't quite follow what you said about the gearing/RPM's. If I use the stock motor I should...

Naw, it mainly just vibrated a lot. The wood fixturing keeps it from going anywhere. A lot less nerve wracking than anything that has ever happened after I get my angle grinder out :).

I've been questioning how rigid my G0704 stand is and whether that matters much for what I'm doing. I have it bolted to the concrete but there's quite a bit of flex to it. What's the effect of...

I cut my Y slide pocket with my G0704 and a sled made out of wood. It worked well enough. Pics are in my thread linked below. You could probably improve on my sled, I was pretty lazy about it.

I...

What are you making that needs more Z travel? The head goes down all the way to the table as it is.

Modest increase in Y travel is possible. Replacing the motor and adding a belt drive is the...

There should be very short pulses, not a constant voltage. It may appear constant but that's just because it is cycling so fast... Or something is really wrong.

Unfortunately you can't tell...

I'm surprised you actually read 5 V on that rapidly changing signal. I use the AC mode of my DMM and just look for some change in voltage. Anyway...

Seeing pulse + dir in one direction and pulse...

Hopefully you have a multimeter handy. You want to prove that your breakout board is getting the signals you think it is. You should see a change in voltage on the step pins when you step in either...

I went with the G0704 and a kit with ball screws. With motors and electronics I think I'm around $2500 (not counting tooling). I think it's a good way to go.

I wouldn't go with a less popular...

Finally got around to upping the Y axis travel. I think I have 7" of travel now. That's the limit with the Y motor mount. I used a Sawsall with a heavy bimetal blade and a 3/8" bit with a hand drill....

There's a metal supply place in my area that has a lot of aluminum cutoffs for $2/lb. Very economical for projects.

Very happy with my Arizonavideo kit. Wish I had modified the casting to increase Y travel when I had the machine apart. The instructions probably could have spelled that out but other than that no...

Tried to get the spindle running last night. I've got a beefy 48 VDC supply, wired it up to the 48 VDC spindle, and it just does like one full rotation and then stops. When I turn off the power...

Well, I'm not sure this is what you meant but the other side of that has all kinds of stuff messed up, it's just hidden from view :).

Gotta get this spindle fired up! Why did I have to be the...

Got my auxiliary spindle mounted. Making the mount was a fun first project in aluminum -- lots went wrong, but ended up with something workable.

This is one of the cheap air cooled CNC spindles...

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G0704 locked up while milling and when I rotate the spindle with the low gear engaged it feels like it has a missing tooth. With high gear engaged it seems normal.

I wanted to pull the...

Ordered, thanks!