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Post by rjpackwin on Oct 30, 2018 21:13:49 GMT -5
I’m experiencing a similar problem to the issue reported by DigitalDoodle. I have had this happen twice on the same job, but two different attempts and I completely re-created the design / tool paths. This is very frustrating since this has occurred both times after 3 plus hours of cutting. I am using a feed rate of 80 ipm which is being converted in the post processor. That seems reasonable, but maybe causing my problem. Hopefully someone can help to resolve this ... I also sent an email to Austin Buck before discovering DigitalDoodle’s post. Attachments:
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Post by gerry on Oct 30, 2018 22:47:59 GMT -5
What bit, spindle speed, and DOC? Ipm is only part of the equation.
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Post by rjpackwin on Oct 30, 2018 23:45:06 GMT -5
1/8” tapered ball end mill (1/4” shank), 15k rpm, .375 DOC.
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pdabk
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Post by pdabk on Nov 2, 2018 11:35:25 GMT -5
Sounds kind of deep for that size bit
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vfn
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Post by vfn on Dec 16, 2018 12:53:51 GMT -5
I have been running into a similar issue. It is very frustrating to say the least! I've spoken with Chad about this issue a few times but I've yet to get a solid solution. Have you? I am running a V-carve inlay toolpath but once it gets to the second pass the X-Axis shifts a few inches in the negative direction. Any help with this would be greatly appreciated!
Specs: AR8 Pro, Aspire 9.512, Feed Rate: 75IPM-X and Y, and 20 on Z axis, DOC: .185 with a 60 degree V Bit cutting into Black Walnut and Curly white maple.
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Post by rjpackwin on Dec 18, 2018 9:00:10 GMT -5
VFN .... after talking with Austin, I first checked all of the coupling connections on my AR8 to ensure they were snug and not slipping. He also recommended that I add a roughing pass using a 1/4” radius core box bit for this project. This seemed to help some. I have since had issues with losing z axis position while taking very light cuts while engraving another project. This is quite frustrating when you have a lot invested in the project and this occurs and ruins it! I do like many of the AR8 machine features, but in my 10 years of owning and operating a Romaxx WD-1 this never happened. If you read through the many threads on this forum category it does seem to happen a lot with Axiom CNC’s!
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vfn
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Post by vfn on Dec 19, 2018 14:48:28 GMT -5
I have had issues with the Z Axis as well. I've tightened the couplings on each Axis along with putting some 3 in 1 oil on the ball screws. The only remedy that I have found for the Z-axis to stay true is to slow down it's movement. I cut it down to 20IPM from the factory 30IPM is was set at. As for the X axis shift I've not found a reasonable solution. I'm still volleying back and forth with Tech Support on this one.
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Post by stevem on Dec 19, 2018 18:51:16 GMT -5
I really think these are great machines, but I don't believe these are high production machines. I know 4 other guys in my area that have the Axiom and have all said the same thing. You can't cut at 200 ipm. The machine will simply lose steps and ruin your work piece. Most I have talked to say when doing a 3-8 hour job they are usually cutting at 30-60 ipm max. It really depends on what you're cutting, but Even though they say these are production cnc's I don't think they are able to perform like one. I love my machine and use it to cut out parts quite often and can cut at 100-125 ipm, but when doing a carving, there is no way they can cut that fast.
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Post by jcwoodworking on Dec 19, 2018 21:34:54 GMT -5
I would have to disagree about not being able to cut at 200ipm. I have had my machine for two months now and pretty much run everything other than deep profile cuts at 200ipm x and y and 40ipm on the z. Maybe I just got lucky, I don't know. I've run 8+ hour 3d tool paths full speed without ever having issues. Hopefully those that are having to slow down can get it sorted out. No reason you shouldn't be able to use the machine to it's full ability.
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Post by stevem on Dec 19, 2018 21:59:25 GMT -5
I was at the Vectric seminar in October and Chad said the machine is rated at 200 ipm, but he doesn't suggest running that fast. I tried running it that fast once and it didn't go well. It was on a piece that didn't matter if it got screwed up. When cutting a 2.5d file, even if you have the machine set to run at 200 ipm, it's really not cutting that fast. Something to do with constant velosity.
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Post by jcwoodworking on Dec 19, 2018 22:35:00 GMT -5
It's worked for me so far so fingers crossed I don't have problems. You are correct on not necessarily running full speed on 2.5d. the x and y have to slow down to allow for the slower z axis. I notice it a lot on lithophanes with a lot of texture. But once it gets to a smooth area it speeds up when possible.
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vfn
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Post by vfn on Dec 23, 2018 23:56:19 GMT -5
I was at the Vectric seminar in October and Chad said the machine is rated at 200 ipm, but he doesn't suggest running that fast. I tried running it that fast once and it didn't go well. It was on a piece that didn't matter if it got screwed up. When cutting a 2.5d file, even if you have the machine set to run at 200 ipm, it's really not cutting that fast. Something to do with constant velosity. Thanks for letting me know what the machine was rated at. I always wondered but hadn't got a definitive answer. I've never ran mine that fast since owning it. Out of the box a ran 100IPM on the X and Y and 60IPM on the Z. It ran just fine that way for a few months but now I've slowed it down to 75 on the XY and 20 on the Z thinking that had something to do with the inaccuracy. I'm still chasing the issue right now. I got an email from Chad with the file to upgrade my controller. Hopefully that corrects the issue.
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vfn
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Post by vfn on Dec 23, 2018 23:58:58 GMT -5
VFN .... after talking with Austin, I first checked all of the coupling connections on my AR8 to ensure they were snug and not slipping. He also recommended that I add a roughing pass using a 1/4” radius core box bit for this project. This seemed to help some. I have since had issues with losing z axis position while taking very light cuts while engraving another project. This is quite frustrating when you have a lot invested in the project and this occurs and ruins it! I do like many of the AR8 machine features, but in my 10 years of owning and operating a Romaxx WD-1 this never happened. If you read through the many threads on this forum category it does seem to happen a lot with Axiom CNC’s! Did you get any definitive answers why you were losing accuracy on your machine? I'm still searching for a fix. I got a solution from Chad that I've yet to try. I will upload some files to my controller after the Holidays.
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