Engraving issues

**JAZZCNC** · 27-02-2016

PUSSY.!!!

Do you have an Earth lead on the machine.? If not then put one on and take back to Star Earth point. It was possibly static.

**D-man** · 27-02-2016

Cheers, nothing like being blunt PMSL

Nothing on the machine itself no. Star earth point?

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**JAZZCNC** · 27-02-2016

Originally Posted by D-man

Nothing on the machine itself no. Star earth point?

You should know this Dman you've been around long enough.!! . . . .Can't just throw this shit together and expect it to work perfectly.

Star point is the Single Earth point in the Control box that you should have for all Gnd's and Shields to return to. If not then your open to Earth loop problems.

**phill05** · 27-02-2016

Before you go ripping into it have you checked ALL vectors are closed in V Carve before you toolpath. (closed not grouped) DXF are a swine to mess you about when imported into V carve.

Phill

**Davek0974** · 27-02-2016

Whatever you do, get a continuous earth from the body of the spindle (If metal) or the mount back to the star point as mentioned, without this, any stray voltage is going to earth via you ballscrews, nuts and bearings - this is seriously bad news and can ruin balls in short time, use multi-strand wire similar to heavy speaker cable etc - flexible but lots of strands.

**D-man** · 27-02-2016

Ok getting to the backlash, is this normal? Seems to bounce back then slowly zero, am I doing something wrong?

This is on the left side of the gantry, bot on the right side it's a different story.

http://youtu.be/GcV8a14q7xs

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**D-man** · 27-02-2016

Scrap that right side is now the same!

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**D-man** · 27-02-2016

Not sure it's made a difference. That "e" is wrote in VCarve. Could it be the processor settings?

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**D-man** · 27-02-2016

Changing the processor didn't help, well maybe a tiny bit, something is still not right and it's at the same pints all the time (at the black dots)

Left is mach3 processor with ARCS
right is mach3 processor with (MM)

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**komatias** · 27-02-2016

That is lost motion somewhere, either backlash or the screws/bearings are not tight. The blips happen when start accelerating when you change direction as you can see. Also have you changed any setting for backlash compensation in the software?