need help to make a pcb with out erros

simon c
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19 Jan 2017 22:01 #86200 by simon c

need help to make a pcb with out erros was created by simon c

I have tried everything soon but mistakes in what I do it does not look like it should And it goes completely wrong when it has to create something round

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tommylight
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19 Jan 2017 22:14 #86201 by tommylight

Replied by tommylight on topic need help to make a pcb with out erros

It shure looks like too much flex in the machine and some missed steps.
Can you post pictures of the machine?

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Todd Zuercher
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19 Jan 2017 22:15 - 19 Jan 2017 22:18 #86202 by Todd Zuercher

Replied by Todd Zuercher on topic need help to make a pcb with out erros

Without more information, it looks like probably a combination of lost steps and maybe some backlash problems.
(too hi acceleration + backlash compensation will often give results just like these.)

Last edit: 19 Jan 2017 22:18 by Todd Zuercher.

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simon c
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19 Jan 2017 22:32 #86203 by simon c

Replied by simon c on topic need help to make a pcb with out erros

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simon c
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19 Jan 2017 22:37 #86204 by simon c

Replied by simon c on topic need help to make a pcb with out erros

I run with these settings in linuxcnc lavalu.de/EMC_Wizard.html

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tommylight
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19 Jan 2017 22:47 #86205 by tommylight

Replied by tommylight on topic need help to make a pcb with out erros

That is a Proxon MF70 right? it should be good for engraving as it is quite a sturdy machine.
The link you pested is to old so start here,

wiki.linuxcnc.org/cgi-bin/wiki.pl
Also check for anything loose on the machine.

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bogie6040
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19 Jan 2017 22:49 #86206 by bogie6040

Replied by bogie6040 on topic need help to make a pcb with out erros

I would start by putting a dial indicator on your table and push up against the non running spindle. Do some tests to make sure that a commanded 1/2 an inch or 10 MM axis move is really what it is doing, first at slow speeds then at the maximum it is setup for. If it can't pass these tests you will never get acceptable results from it.

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Sparky961
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20 Jan 2017 01:31 #86219 by Sparky961

Replied by Sparky961 on topic need help to make a pcb with out erros

Adding to what others have suggested, you'll also want to set up your strap clamps differently. If it isn't already, you're just asking for your material to move on you the way you have it clamped now.

This video shows some of the basics for clamping:

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simon c
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21 Jan 2017 11:38 #86349 by simon c

Replied by simon c on topic need help to make a pcb with out erros

I have tried again and make the same mistakes again max velocity and jog speed does not move itself so that it is 84mm all the time I do not know if the machine or program it wrong with

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bevins
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21 Jan 2017 21:42 - 21 Jan 2017 21:45 #86382 by bevins

Replied by bevins on topic need help to make a pcb with out erros

Looks like backlash to me.

Show some pics of your machine and the drive trains...... ballscrew, rack and pinion or whatever you use.

Its pretty much symetrical in the way it is cutting, does the same oval everytime and the spacing looks right, so something in your drivetrain is out.

Just my 2 cents.

Bob

Last edit: 21 Jan 2017 21:45 by bevins.

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