Fixing Circles which are not Round or closing....

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Anthony Zeh
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Fixing Circles which are not Round or closing....

Postby Anthony Zeh » Sat Sep 03, 2016 8:25 pm

Had this issue and found a threat on the CNCzone, but no one had a good answer. They were all making odd adjustments to try to compensate for what seemed to be a "Y" backlash issue. I finally got it worked out and much happier with my machine performance. I have a KH-5030, so this may not be an issue on other machines.

I ended up making adjustments for the backlash, under the User tab next to the Work tab in RDworks. I had an issue where my circles were not quite round with a little flatness to the top an bottom of circles (also Circles were not closing). I adjusted for my Y Backlash under the User tab to 0.35mm and that made my circles round and got rid of the non-closing of the circle. If you have flatness on the sides of a circle you will have to adjust the X backlash.

How to adjust for Backlash.
(1) Go to the User tab on the right side of the screen in RDworks. Make sure you can see the OPEN, SAVE, READ, WRITE buttons.
(2) Click READ and then SAVE button to Save your Original Setting from the machine
(3) Go down to "Other" in the User Tab: then to Backlash Y(mm) and enter 0.35 (You may have to adjust this based on your backlash amount. I made 1 in circles until I got the roundness I was looking for. For me it was at 0.35)
(4) After you enter the new value Click WRITE which will write new settings to the machine. (run your test circle to see results)
(5) If your WRITE button is greyed out, you must do a READ to the machine first, then it will allow you to write new inputs.

Hope this helps others!

Original CNCzone Thread:http://www.cnczone.com/forums/general-laser-engraving-cutting-machine-discussion/300798-cutting-circles-issue.html
50W KH-5030 Laser - BL
Tony

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Gene Uselman
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Re: Fixing Circles which are not Round or closing....

Postby Gene Uselman » Sun Sep 04, 2016 5:22 am

Thank you Anthony- always good to post solutions to problems for the people walking in our footsteps. I wonder if this should be moved to the FAQ section as I think it is more machine setup problem that is fixed with the software? Gene
Gene- 130W 1300x900 China Laser with 2" FL lens
V8.01.19 RDWorks on Win 7 pro
500mm Z, blade table machine home is upper right.

100W Reci tube in a Bodor BCL0605MU V8.01.19
600x500x 200Z, SS table, 2" FL- mach home upper right
Vectric Aspire software- FlexiSignPro- vector/bitmap

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Keith Sherwin
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Re: Fixing Circles which are not Round or closing....

Postby Keith Sherwin » Fri Nov 11, 2016 11:51 am

Anthony, I just had an interesting conversation with a Major Laser Supplier. Please answer this question. Where does the laser head call home? Top Left or Right?
69 Real (80)Watt Laser w/multi FL lenses. T.L.
Made 5 CNC's, Electronics, Electrical, PLC & Computer background.
:idea: Started this forum - Using RDWorks V8.01.21 on W7 Pro
Lead in creation of the RDWorksLab English Manual.
Crazy Uncle Keith!

Anthony Zeh
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Joined: Sun Jul 17, 2016 4:08 pm
Location: Phoenix, AZ U.S.

Re: Fixing Circles which are not Round or closing....

Postby Anthony Zeh » Fri Nov 11, 2016 12:04 pm

I have my machine set to top left, but default i think is top right.
50W KH-5030 Laser - BL
Tony

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Keith Sherwin
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Re: Fixing Circles which are not Round or closing....

Postby Keith Sherwin » Fri Nov 11, 2016 12:12 pm

Where are your limit switches ??
69 Real (80)Watt Laser w/multi FL lenses. T.L.
Made 5 CNC's, Electronics, Electrical, PLC & Computer background.
:idea: Started this forum - Using RDWorks V8.01.21 on W7 Pro
Lead in creation of the RDWorksLab English Manual.
Crazy Uncle Keith!

Anthony Zeh
Posts: 23
Joined: Sun Jul 17, 2016 4:08 pm
Location: Phoenix, AZ U.S.

Re: Fixing Circles which are not Round or closing....

Postby Anthony Zeh » Fri Nov 11, 2016 12:14 pm

For the x axis on the left, for the Y axis to the back.
50W KH-5030 Laser - BL
Tony

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Keith Sherwin
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Re: Fixing Circles which are not Round or closing....

Postby Keith Sherwin » Fri Nov 11, 2016 12:21 pm

That makes your home "Top Left" or as you put it, Back Left :D Which is just as accurate.
Thanks for that answer -
Might be handy for people to include it in their equipment signature TL or TR.
69 Real (80)Watt Laser w/multi FL lenses. T.L.
Made 5 CNC's, Electronics, Electrical, PLC & Computer background.
:idea: Started this forum - Using RDWorks V8.01.21 on W7 Pro
Lead in creation of the RDWorksLab English Manual.
Crazy Uncle Keith!


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