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Drag Knife Setup on Homag CNC with WoodWOP

1/7/25       
Tom

I am having trouble getting my machine to run with no spindle rotation.
I have it turned it turned off in the tool data but the machine doesn't want to run the program. You cannot set the RPM to 0 either as WoodWOP wont allow that.

Is there any workaround for this anyone has found?
we have a homag vantage 100 and we are using WoodWOP software.

1/7/25       #2: Drag Knife Setup on Homag CNC with ...
BH Davis  Member

Website: http://www.bhdavis.net

If you can post a short file here so people would look at it for you. Perhaps examining the cut file itself will find a solution.

1/7/25       #3: Drag Knife Setup on Homag CNC with ...
Mike

Tom,
I know this doesn't help, but with my brief interactions with modern Woodwop, I never felt like I had the control I wanted. Maybe lack of education, or if that is how it was designed. I don't know. That is why I prefer controls that just read G and M codes. Way easier to edit and get the results you desire. Lots of controls out there that read standard code. Woodwop and the stuff Biesse reads is beyond my ability to comprehend. Perhaps because I'm almost 60. Good luck. For my brief tryouts, Dragknife is pretty cool. Simple, but cool.

1/8/25       #4: Drag Knife Setup on Homag CNC with ...
Karl E Brogger  Member

Website: http://www.sogncabinets.com

I've been meaning to play with this myself.

What are you using to create the toolpaths?

I'd call Stiles. They're support over the phone has been pretty good the couple of times I've used it.

1/8/25       #5: Drag Knife Setup on Homag CNC with ...
Mack McPherson Member

The drive has a minimum RPM setting. RPM of 0 will not work, drive does not understand no rotation.
After the drive there is a contact that is pulled in to supply voltage to the spindle. the auxiliary will have a normally open switch to give the Beckoff a spindle ON input. After that contact, might be A01-K200, its 3 wires into the spindle. there is no feedback at the spindle to say if it rotates or not.

Stiles Tech support would be a good start to see if there is a work around without modifying the spindle circuit. Otherwise a spindle without direct power after the contact the machine will go through all motions without turning the chuck.

1/10/25       #6: Drag Knife Setup on Homag CNC with ...
Karl E Brogger  Member

Website: http://www.sogncabinets.com

I'd bet money there's a digital work around. It's buried somewhere in one of the text files I would think

1/10/25       #7: Drag Knife Setup on Homag CNC with ...
Chris Member

you need to enter a line into the O1 file, located in the cnc folder:
TOOL_RPM0!0000000904:Tnummer mit zulaessiger Drehzahl

obviously you need to exchange the tool number for your own.

then in tool management, set the tool speed to 0 (values T2, T2.1, T3 & T4) and direction of rotation (T5) to "none".

In your woodwop file: make sure the tool speed is defined as absolute and at 0


Also, yes you can enter G and M codes into woodwop, using the NC-subroutine macro. Or rewrite the templates which woodwop uses if you are confident!
1/10/25       #8: Drag Knife Setup on Homag CNC with ...
Tom Member

Thanks for the responses guys.

Karl, i am using AutoCAD and WoodWOP for my toolpaths.

This sounds promising Chris I will give this a go on Monday morning.
I found the folder and added the line:

TOOL_RPM0!0000000904:T130 mit zulaessiger Drehzahl

I think i've understood you correctly? my tool number being 130.

Thanks Again

1/10/25       #9: Drag Knife Setup on Homag CNC with ...
Chris Member

everything after the " : " is just a description (helpfully in german of course!)

it should be :
TOOL_RPM0!0000000130:

of course I should have also said. important to make a backup of the original file before making any changes. And maybe even a 1:1 machine backup.
1/10/25       #10: Drag Knife Setup on Homag CNC with ...
Chris Member

Also, vectric has support for a drag knife, and is easy to import into woodwop.

https://docs.vectric.com/docs/V9.0/VCarvePro/ENU/Help/Gadgets/Drag%20K
nife%20Toolpath/Drag%20Knife%20Toolpath.html

1/10/25       #11: Drag Knife Setup on Homag CNC with ...
Tom Member

Thanks a lot for your help Chris. I'll make backups and look into the vetric software too. Ill let you know how I get on on Monday.
Cheers

1/10/25       #12: Drag Knife Setup on Homag CNC with ...
Karl E Brogger  Member

Website: http://www.sogncabinets.com

Vectric makes a .png done that goes into woodwop. Then woodwop does its thing.

That's what I was curious about, is whether you're doing a polyline in woodwop or a regular contour

1/11/25       #13: Drag Knife Setup on Homag CNC with ...
Anton Dutkiewcz Member

Hey, I feel ya on this one! 😕 I haven’t found a perfect solutoin either, but one thing I tried was setting the rpm to the lowest possible value (like 1 rpm) since WoodWOP won’t allow a 0. This at least simulates no spindle rotation and sometimes it does trick the program into running.

Another idea I heard was tweaking the tool data settings or inserting a g-code that bypasses the spindle call. But honestly, it might requre some trial and error depending on how the machine handles zero rpm commands.

Good luck experimenting – hope one of these tips helps get your Vantage 100 moving without that pesky spindle spin! ✌️

1/13/25       #14: Drag Knife Setup on Homag CNC with ...
Tom

Unfortunately still no luck, what type of Process did you use?

I'm using a vertical trimmer could that be the issue?
does Vcarve generate a different type of process?

Also the tool is set as a vertical trimmer in the WZ_DB Tool Type 01 Vertical Trimmer on the machine.

attached some images with the errors


View higher quality, full size image (1106 X 517)


View higher quality, full size image (1106 X 744)


View higher quality, full size image (1915 X 1076)

1/13/25       #15: Drag Knife Setup on Homag CNC with ...
Chris Member

Hi Tom,
that looks exactly the same as I have set up. Sorry can't say why it doesn't work for you.
Maybe worth trying a different tool type in the tool manager (aggregate?)

Do you have a screenshot of the O1 file also?

1/13/25       #16: Drag Knife Setup on Homag CNC with ...
Tom

Hi Chris, I was looking at other tool types but struggling to find something suitable.


View higher quality, full size image (1076 X 898)

1/14/25       #17: Drag Knife Setup on Homag CNC with ...
Karl E Brogger  Member

Website: http://www.sogncabinets.com

Woodwop gets cranky with underscores in the name for me.


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