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Yeah sorry I don't want to lead you astray since I do not use MadCAM personally so I cannot comment on the exact details. It will be one or the other, and once you do a few air cuts with different...

When you decrease your step down it actually roughs in your neck pocket. With a 0.25" step down it did not rough in your pocket. I'm fairly certain it would cut your pocket fine if you allow it to...

Did you flip the filler neck and machine off the remaining bit of aluminum or is it glued down to a sacrificial block?

Johnny excellent work, honestly. I have exactly zero knowledge on how guitars are designed. Are there basic formulas to get the sound right? Or do you just basically design on a hunch and see how...

If you have physical access to your machine it's very simple. Air cut without that option, then air cut with it. Watch how it works. Essentially both ways you cut to the same depth, using multiple...

It sticks around as black soot that washes off.

Not sure if it works well with EPS but I don't see why not. I always used the pink foam insulation I buy at the hardware store here.


Just...

I think Sharpen is right.

What I would do is turn my machine on so the steppers keep all the axis locked in place. Put a dial indicator on the machine and test each axis by hand by...

Looks essentially like the very first CNC machine I started but never completed. Mine was built out of 2x4s, ready rod (all thread) and 1" conduit. I never completed it but I got the CNC bug. I...

Casting!

Love it. Casted my gantry risers and Z plate myself. I learned a few things doing it. The first thing I notice with your servo bracket is you only have one inlet and no outlets. ...

Ger is absolutely right about allthread and larger steppers being generally a poor combo.

I highly suggest you look at either ball screws or rack and pinion. Ball screws can be had fairly...

I also have a 3mm pitch ball screw on my Z axis with a 3:1 overdrive belt drive and the highest speed I can coax out of it is 300 ipm which really sucks considering the rest of my axis go 5X faster. ...

Conversely you could work backwards by taking your desired speed, acceleration, and gearing to figure out how heavy you can build your gantry.


If calculations aren't your strong suite it...

There is software available on some of the stepper motor and servo motor manufacturers websites which will help you with this question.

I'm guessing you don't have much experience building and...

Also what are your calculated max velocities and acceleration? I noticed your Z axis seems to have a fine pitch ball screw. You might find your Z feed rate limiting your machine. This had been an...

Looking good TD, question though how are you going to support your top bed? I have a large machine myself and I found I needed a lot more steel frame work than I expected to keep my bed stable.

If still no change change it to P0.5 and check for a difference. Note that your cuts will be horrendous but it will let us know that your accelerations are too low to maintain a constant feed rate...

Try using G64 P0.05 instead of P0.005 and see if it improves any.

Chevy have you tuned your CV yet?

Check out this link, I still think it's a CV issue.

http://www.machsupport.com/docs/Mach3_CVSettings_v2.pdf

Chevy can you post the original dxf file you made the gcode from. I'm pretty sure I can fix your problem

You're right I must have forgot to attach it. Anyway put it after g53 at the top of the file. But after gauging by your for length I don't think you are combining short line segments. Can you...

Alright I attached the file with the G64 command where it should be. Can you re-run it with the G64 in that position and tell me how it goes?

Also you never attached your non-jerky Gcode. Can...

Just add it to the top of your gcode file!

You could also mount the bottom of the actuator to pad of the leg closest to the pivot point and add a slight drop bracket on the panel to give better leverage. I'd sketch up what I mean but I'm...

The frame looks pretty rigid, what about moving the actuator connection point closer to the pivot point to cut down on the stroke you need. Use a 8 inch stroke linear actuator?

Try putting G64 P0.005 at the top of your gcode, run it, get back if the problem persists.

Also since you built your machine what are your max acceleration values? Are they consistent over each...

Can you post the top section of both outputted GCodes please. I just tested both on my computer and both pieces of GCode look essentially identical. The arcs are both handled the same and neither...

Sounds like the other post processor is putting Mach3 into exact path mode. Can you copy and paste the preamble from the top of the jerky G-Code here?

If you see a G61 (exact stop mode) replace...

Yes you have too much going on. Remove safe Z from mach3, and set rapid clearance to 3" in sheetcam.

Feed/speed calculator?

Maybe?

Oh okay, the picture must be deceiving then! Have you tried any thicker materials?