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These are three test cuts I made using Mach3, UCCNC Screenset 2017 and default UCCNC. I used Vectric Aspire to make the g-code.
Cut #1 in the photo was made using Mach3 Screenset 2010 and a parallel port to the BOB. The edges are clean cut and nice and smooth.
Cut #2 using the same G-code was cut using UCCNC Screenset 2017 and the UC300ETH-UB1 to the BOB. The edges are cut like they are scalloped.
Cut #3 was the same G-code using UCCNC.
I have tried to use UCCNC more than once and I kept seeing this same problem. I ruined a sign ($65) the first time I tried to use UCCNC.
At this point I have NO confidence in UCCNC cutting what was programed into the g-code.
I've been using Mach3 Screenset 2010 for years without problems. I kept reading and seeing that UCCNC is an improvement over Mach3, that's the only reason
I thought about trying UCCNC.
Are there any thoughts on what the problem is?

P.S. I tried to use the UC300ETH-UB1 with Mach3 but have not been able to set it to setup.

Yes, you should define the tolerances (CV parameters) properly. The UCCNC always follows the path as close as you telling it to.
While Mach3 has no tolerance parameters at all, you can only guess about how much path errors it will make on different toolpaths.
And since there are no tolerance paramters in mach3 the UCCNC ofcourse can't import them from a mach3 profile. You have to set them up to values which fits your job.

You should never do production on a machine which was never tested by you before and while you are unfamiliar with the controls. You should first run tests like what you showed now.
If you take this advice then you will not ruin expensive parts anymore.

Mach3 runs fine with the UC300ETH. Don't know what problems you have with it so it is not possible to help with it. The setup is pretty simple.

Assuming you're machine is using inches, you probably need to change the CV parameters.

What are your linear error and corner error settings?

I Don't know where to find the CV or linear error and corner error settings

Sorry I found the CV Settings

Max Corner Error: 0.03
Max Linear Error: 0.03
Max Linear addition Length: 1
Max Unify Length: 2
Stop @ Angle 89

A_Camera wrote:Mach3 runs fine with the UC300ETH. Don't know what problems you have with it so it is not possible to help with it. The setup is pretty simple.

I found my problem using UC300 with Mach3.
I forgot to change to port settings from 1 to 2.

Try these settings:

Max Corner Error: 0.002
Max Linear Error: 0.002
Max Linear addition Length: .05
Max Unify Length: .1

ger21 wrote:Try these settings:

Max Corner Error: 0.002
Max Linear Error: 0.002
Max Linear addition Length: .05
Max Unify Length: .1

Thanks Ger21I'll try these settings.

Gene8522 wrote:

ger21 wrote:Try these settings:

Max Corner Error: 0.002
Max Linear Error: 0.002
Max Linear addition Length: .05
Max Unify Length: .1

Thanks Ger21I'll try these settings.

Ger21,
Thanks for your help. As usual your advice was spot on....