Incompatible dimension

Hello
I have a problem with, sizing, sizing
I use a 2.5mm cutter
For example, I cut a 50x50mm square and 1mm is not enough on each side
Nema 23 2.8A motors step 1.8
GT2 20 drive 6mm belt

$100 = 40. 000
$101 = 40. 000

I measured the traffic in every direction, it was correct
What might be helpful?


G21
G90
G1 Z3.810 F228.6
G0 X75.444 Y24.150
G1 Z-2.000 F1000.0
G1 X76.105 Y24.368 F1000.0
G1 X76.547 Y24.903 F1000.0
G1 X76.640 Y25.242 F1000.0
G1 X76.643 Y75.532 F1000.0
G1 X76.381 Y76.175 F1000.0
G1 X76.126 Y76.418 F1000.0
G1 X75.471 Y76.648 F1000.0
G1 X25.181 Y76.631 F1000.0
G1 X24.847 Y76.522 F1000.0
G1 X24.334 Y76.053 F1000.0
G1 X24.150 Y75.400 F1000.0
G1 X24.188 Y25.095 F1000.0
G1 X24.538 Y24.495 F1000.0
G1 X25.155 Y24.174 F1000.0
G1 X75.444 Y24.150 F1000.0
G21
G90
G1 Z3.810 F1000.0
G0 X0.000 Y0.000
G4 P0.1

Looks like you might be cutting “on path” instead of outside.

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It doesn’t cut out
Off the path
Pieces. Outside

Are you using Easel? as Neal suggested how do you have your object set to cut?

image

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Yes cut Outside shape path

Have you measured your bit with calipers to see if it is the exact dimension you are telling Easel it is? There are you tube videos on how to dial in your steps per millimeter. Might want to look those up and run through them to dial in your settings.

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That’s exactly 2.5mm
I think that I will just try to calibrate the steps exactly along the entire length of the machine
You mean this flm

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What machine are you using?
Other causes:

  1. Deflection (cutting too aggressively)
  2. Backlash (likely on a 3018 or similar machine)
  3. Slop in mechanics (loose v-wheel or spindle mount)

Uploading: Snapchat-1222691695.mp4…


Today I have calibrated all axes exactly, all the way to the millimeter along the entire length of the machine
But I found out that the spindle is not in a straight line
Could this be the cause?
The machine is self-made trolleys too, so something is crooked

There are 4 bolts on each end of your rail were they attach to the side plate you may have enough play in the holes to take that out.

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If I remember correctly, I fiddled with the eccentric nuts on the v-wheels loosened one side tightened the other on mine. Been awhile since I did mine.

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Thank you for your response
Do you think this is one hundred percent the cause of inconsistent dimensions?
I made the plates myself so it’s probably not accurate here

In your first video, jogging one mm repeatedly. Try the same thing, but after you jog a few times left, jog back to the right.

Tell us about the machine. Is it belt driven? Leadscrews? Ballscrews?

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So I did it all the way through, I had to calibrate the Y axis 40.025 and the X 40.030
But there are still dimensional errors when carving
I think that’s the fault of the crooked carts
That they are not vertical
Could it be this?
The machine I built myself is driven by a GT2 belt