Best part of guitar building...

[DarkPenguin]

Is when the old CNC decides to take a wander across and through the body you've been working on forever. Then you can just go buy a warmoth.

 

[AirCap]

Best part? Getting paid.

Okay, seriously - seeing the guy smile when he first plays it.

 

[Rick]

You got a cnc?

 

[DarkPenguin]

You got a cnc?

Bought a chinese knockoff of an Openbuilds OX CNC. Running an openbuilds black box controller with it. Pretty slick.

I think I've figured it out. If you hit the stop button you really need to reset everything. Seems to work better.

 

[ragamuffin]

Ouch!

 

[DarkPenguin]

Solved the last issue. And now the bit freed itself. Speed and feeds are a joy to sort out. And downcut bits don't clear their chips and up cut bits will pull themselves out of the chucks if you don't give them the extra gronk when tightening them.

Need a few more dozen/hundred hours on this to sort it out properly.

 

[Cagey]

I've seen in some wood-cutting circumstances where it's advantageous to simply drill some smaller holes, then enlarge them by extrapolation. That is, cut around an existing hole's diameter to increase its size. That way, the bit is side-cutting rather than drilling and trying to push/pull the waste. More speeds and feeds to figure out, but better that than destroying a cutter/end effector/workpiece.

 

[AirCap]

Do a little research about climb milling versus conventional milling. Learn which direction to drive your cutter for best tret removal and which direction for finish passes. Wouldn't hurt to learn a bit about cutter geometry, too. Your cutter salesman should advise you.

 

[swarfrat]

Drilling is absolutely the fastest way (except for sawing) to remove material. When I worked in machine tooling, drills were big business, and they spent a lot of effort to showcase them.  If you have an underpowered CNC at home, by all means do your hogging with a drill. Just leave enough meat left that you're dealing with sawdust and not huge chunks of material breaking loose.

 

[DarkPenguin]

My cutter salesman is aliexpress. So probably not getting much help there.

What's odd is the first item is being machined properly. Then it goes to move to the next spot (chambers I'm trying to clear) and the whole thing just $%^&s off in the wrong direction and tries to bury the bit. Bah!

I've another body blank prepared. If a template cut goes well I'll try cutting it on the machine. If it doesn't go well I'll just use a template I already have.

Trying to figure out if cam would go better if I bought vcarve. Fusion 360 cam never seems to go the way I think it should.

 

[AirCap]

So the extra load of going off-course is pulling your cutter out?

Let's address the meandering toolpath first.... Problem with establishing zero points before starting program over? (G0G54X0Y0Z0) Programming problem? Even if the program is written in conversational, if goes through the post and comes out in G-code. Have you checked that?

 

[swarfrat]

Does it move correctly with no tool? Sounds like a relative/absolute offset thing

 

[DarkPenguin]

Does it move correctly with no tool? Sounds like a relative/absolute offset thing

It does the first cut perfectly. So that part works. I would think the multiple cuts in that section should prove that the offsets are right.

Very confused.