Help, Cutting problems

Hi, I finally dug my machine out and got it running, have a DDCSV 2.1 on the machine now

What's going wrong?

Mechanical or software?

It's meant to look like this
Attachment 27409

Attachment 27410

I cut it once, let the cut finish. Turned the power off and on again to machine and then repeated the same cut again next to it to see if I was losing steps.

Attachment 27408

2 cuts look identical to me.

I used Fusion 360 to generate the Gcode.

I have AM882's which have fault protection and if you drive them too fast they do fault but running the cut very slow 1m/min not getting any faults
Adaptive clearing and contour for finishing pass.

Things I have already done

Replaced the couplings they were crappy Flexible ones with semi crappy ones
Attachment 27411

Replaced one of my motors with a new 3nm one for the gantry as that was 2nd hand and underpowered, I also have 2 4nm cnc4you ones to drop on the bottom axis which has 2*1.8nm on it at the moment and I will swap one of the motors from my bottom axis onto the Z which has a 1.2nm 2nd hand motor.

Which won't help but at least it'll cut wrong a bit quicker.

Made sure the wiring is grounded from the spindle and the Nema's to the GX20 plugs and grounded the wiring from spindle to GX20 socket. The GX20 sockets are mounted on a metal plate that's grounded.

Checked the soldering and continuity from stepper driver to Nema motors.

What cutter are you using and what is the stepover?

Your passes look flat-bottomed as if you were using a square end mill instead of ball nose.

Quote:

---

Originally Posted by cropwell

What cutter are you using and what is the stepover?

---

https://www.amazon.co.uk/gp/product/B073RKDLDR/

This is the cutter I set it up as a 6mm D 25mm cut length, 2 flute end mill in Fusion

Attachment 27412

Run speed full speed, not set up speed control I only intend to do wood and maybe a one off make myself new aluminum plates if I make ever another machine.

That's a roughing operation. You've set it to leave 0.5mm so you can come back with a finish pass using a ball nose bit or something else.

OK, it looks as though you are getting steps because the stepover (not stepdown) is too big for a flat bottomed end mill. Try a round nose cutter with a final pass stepover of 10% or less. I don't use Fusion so I don't know the setup parameter screens.

It looks a bit like you are not getting past the roughing cuts.

Quote:

---

Originally Posted by Nealieboyee

That's a roughing operation. You've set it to leave 0.5mm so you can come back with a finish pass using a ball nose bit or something else.

---

I also have a contour operation nextAttachment 27414

Quote:

---

Originally Posted by Nealieboyee

Your passes look flat-bottomed as if you were using a square end mill instead of ball nose.

---

I am but it's setup up as
Attachment 27415

What is your step over amount?