URGENT ERROR - WILD LOOP!

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Woodworker
Posts: 639
Joined: Tue Mar 11, 2014 1:37 am
Location: 5 miles north of Benson, NC

Re: URGENT ERROR - WILD LOOP!

Post by Woodworker » Sat Aug 23, 2014 5:49 pm

Wel,I will guess that it is communication problem between UGS and the Arduino. I have the issue at times and have found no reason. I upgraded to a shielded USB cable and that did not help.

Have you moved the the machine or the wiring around since that last good run?
BRuce - SO2 #4798 - IC's Z axis upgrade, customized Z rail and Z motor mount, spindle Dewalt 611

philIam
Posts: 67
Joined: Sun Aug 17, 2014 7:13 pm

Re: URGENT ERROR - WILD LOOP!

Post by philIam » Sat Aug 23, 2014 5:51 pm

Guys I've isolated the exact incident to these commands. Absolutley no where in my svg do I have a path do this crazy stuff..

>>> G3 X0.2397 Y1.7603 I0.4206 J-0.9763
ok
ok
>>> G3 X0.0143 Y1.4182 I0.757 J-0.744
ok
>>> G3 X-0.0647 Y1.0163 I0.9822 J-0.4019
ok
>>> G3 X0.0144 Y0.6144 I1.0612 J0
ok
>>> G3 X0.2397 Y0.2724 I0.982 J0.4018
ok
>>> G3 X0.5773 Y0.0414 I0.7575 J0.7447

It's in the above somewhere.

HERE is a video of it in action:

https://www.youtube.com/watch?v=JTajoutuuHk

philIam
Posts: 67
Joined: Sun Aug 17, 2014 7:13 pm

Re: URGENT ERROR - WILD LOOP!

Post by philIam » Sat Aug 23, 2014 5:52 pm

Yes I'm very doubtful this is anything but a makercam Gcode issue.

WillAdams
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Location: Pennsylvania --- south of the Turnpike, East of US-15
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Re: URGENT ERROR - WILD LOOP!

Post by WillAdams » Sat Aug 23, 2014 6:04 pm

In that case it might be the too-long lines problem --- they all seemed short enough though.

http://www.shapeoko.com/wiki/index.php/ ... m_Expected
Shapeoko 3XL #0006 w/ Carbide Compact Router w/0.125″ and ¼″ Carbide 3D precision collets

philIam
Posts: 67
Joined: Sun Aug 17, 2014 7:13 pm

Re: URGENT ERROR - WILD LOOP!

Post by philIam » Sat Aug 23, 2014 6:10 pm

concerning the wild loop - still no answer yet Will I'll check that link out.

As for the deep suicide dive, i just cleaned the deck off cut the rest out with a dremel and removed my piece and saw that the two waste boards were splitting in half. The screws had become loose... I'm guessing that can cause the bit to catch a side and dive into uncharted territory!

Thoughts?

philIam
Posts: 67
Joined: Sun Aug 17, 2014 7:13 pm

Re: URGENT ERROR - WILD LOOP!

Post by philIam » Sat Aug 23, 2014 6:32 pm

Will, very helpful link.

Indeed, it sounds like bc my issues are happening when getting deeper and on my rounded edges, my X axis may have been too loose. Does this sound like it could cause my bit to catch and go onto a separate path?

The crazy loop is still unexplained.

philIam
Posts: 67
Joined: Sun Aug 17, 2014 7:13 pm

Re: URGENT ERROR - WILD LOOP!

Post by philIam » Sat Aug 23, 2014 8:09 pm

I made a completely new design with a rounded circle.

Makercam is throwing in random Gcode once upon the start. Very odd. Anyone have any idea of how we can fix this? Ford? let me know if I can help. In the mean time I'll have to start it a tad higher and go a tad deeper to avoid that first pass fail.

philIam
Posts: 67
Joined: Sun Aug 17, 2014 7:13 pm

Re: URGENT ERROR - WILD LOOP!

Post by philIam » Sat Aug 23, 2014 8:56 pm

Ok I have previewed my gcode and here's what it looks like.

Looks normal but NOPE it does a full circle then continue on its path at the first rounded section to the upper left side of the cut. It never does it again after the first pass.

So... not gcode/makercam? grbl mis-interpretation?
Attachments
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philIam
Posts: 67
Joined: Sun Aug 17, 2014 7:13 pm

Re: URGENT ERROR - WILD LOOP!

Post by philIam » Sun Aug 24, 2014 3:18 am

Will - just saw your post at hte end of the last page - OK.

But still puzzled by random gcode.

would having a .123 diameter value for a .125 bit have something to do with nipping the edges?

criznach
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Joined: Sat Dec 14, 2013 5:28 pm
Location: Great Falls, Montana, USA

Re: URGENT ERROR - WILD LOOP!

Post by criznach » Sun Aug 24, 2014 4:03 am

I upgraded my Grbl to 9g the other day and had been looking for something to test it, so I ran your gcode on some scrap plywood. I only let it run about 4 passes, but it looks good to me. I'd definitely check out your belt tension, pulley set screws, and stepper motor current. Also definitely keep the cut free from chips, because the bit will gum up and will want to wander in random directions, and eventually bind and snap.

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