Issues with 3-axis interpolation

[cncdrive]

My suggestion is to please read the UCCNC users manual to understand these parameters.
And yes, they flatten the path, but only with max. 0.5 linear error units and 0.1 max. on corners, because you set these values.

[ger21]

Mach3 has no error tolerance settings, so it will round off corners and run much faster. Mach3 also has bugs where this rounding will often lead to visible gouges.
UCCNC follows the toolpath much more accurately, which can result in slower speeds, unless the tolerance settings are loosened up. But the good news is that because of the increased accuracy of UCCNC, you can usually increase your carving speeds by 30%-50% over Mach3, and actually run faster, with more accurate parts, once you find the correct settings for your parts and machine.

[X-Pam]

My suggestion is to please read the UCCNC users manual to understand these parameters.
And yes, they flatten the path, but only with max. 0.5 linear error units and 0.1 max. on corners, because you set these values.

As usual thanks a lot for the support.
Well, I don't know if you watched the video you can find in previous message I posted, in that video you can see the machine that every 1 second slow down from 2.000 to 800/1.000 fed rate during 3-axis interpolation.
I read the manual and I also read a lot of posts and comments surfing the web where many peoples have the same issues on 3D works with UCCNC.

Now the question is: is there a way to resolve?
As I wrote the only settings that provide a smooth movements are the insane settings I posted in my previous message (I spent 2 hours changing a little bit the value), below these values I have the issues with frustrating feed rate changing every seconds and the machine not works good in that way in my opinion, and I waste a lot of time to end the job.

You wrote these values flatten the path, but with other values the CNC doesn't work well, so what I can do to resolve, to have a smooth and fluid path?
Can you suggest me some values to tests?
Have I to reduce the feed rate?
From 2.000 to 500 for example?
I don't think it's a great idea, I upgraded the CNC from Mach3 to UCCNC and AXBB-E to increase productivity and safety, but actually on 3D path I have terrible results.

Can I send you an email with details and can you give me support?
I am professional and I must start to produce, it's not a problem to pay for assistance of course.

[dezsoe]

Sorry, I was away from my PC today. I've just sent you a mail.

[GeorgS]

As I am also trying to find the perfect values for my machine in UCCNC, a question:
the linear addition and unify length max., is it a value in mm or a factor on the error max. ?

Georg

[ger21]

It's a distance, in whatever units you have setup UCCNC with. See the manual for a drawing that explains it.

[Battwell]

i just looked at your motor settings. you have acceleration set very low. is there a reason for this?
try setting acceleration to 1000 instead of 300. this will speed things up a lot.
this machine is set to 1000 acceleration https://www.youtube.com/watch?v=sxoRsCADHEc&t=3s

[GeorgS]

1000 acceleration IMO is much too high for many router machines. Of course you can then run the gcode "smoother"- theoretically.
in fact, your result in quality will be worse as the machine will warp

[eabrust]

1000 acceleration IMO is much too high for many router machines. Of course you can then run the gcode "smoother"- theoretically.
in fact, your result in quality will be worse as the machine will warp

What is your basis for stating an acceleration of 1000 is too high? 1G = 9800 mm/s^2. So using 1,000mm/s^2 is .1G, and 300 mm/s^2 is .03G. Have you tried altering the acceleration and tested? If the machine is constrained to go slow, it will go slow.

regards
Eric

[Battwell]

1000 acceleration IMO is much too high for many router machines. Of course you can then run the gcode "smoother"- theoretically.
in fact, your result in quality will be worse as the machine will warp

The only time i have had to reduce acceleration is on my very heavy machine with 2 ton gantry which runs on single phase. that machine is restricted to 750 acceleration and 30m/minute rapids per axis.
and on a direct drive atc carousel with 8 increments ( as low as 0.5)
a small lighter weight machine will perform much better with a sensible higher acceleration normally.