THC accel/decel

[Vmax549]

(;-) I am sure that if accel is set high enough the THC side will work ok. But with that same setting teh Zaxis side does not work well. Hopefully teh new planner will solve that. Note that you cannot always tell how a plasma machine is going to cut by looking at the signals. You have to test it in real conditions. What sounds good on paper may not cut good on the table. A plasma arc is a fickle mistress at best.

Question on teh new planner. HOW will you change settings for teh planner on teh fly ?? OR will you ??

(;-) TP

[Robertspark]

Robert Robert, The world does not think as you do. Pouring more money and time into an application by buying things until you find a solution or not is not how the world operates.

Terry. ..... you are either a jack of all trades and a master of none..... or a master of one... UCCNC will NEVER be a Master of all things CNC ..... hence choose the application and tool that best suits the requirements.

[Vmax549]

HiyA Robert, Pal you have no idea where these shoes have walked. I first started in this field in teh fall of 1969. That was when I cut my first set of qualified threads on a lathe. Checked by thread wires and a Micrometer. I made teh bolt AND the nut to fit to spec. It has been a long interesting road since then (;-). A lot of water has passed under the bridge.

The last 15 years has been spent help people get aquanted with and use CNC. From Job shops to personal hobbiest.

Now do I know everything that can work ?? NOPE But I do know most things that won't work (;-). That is just from personal experience.

Have a happy life, (;-) TP

[Vmax549]

HiyA Robert, Pal you have no idea where these shoes have walked. I first started in this field in teh fall of 1969. That was when I cut my first set of qualified threads on a lathe. Checked by thread wires and a Micrometer. I made teh bolt AND the nut to fit to spec. It has been a long interesting road since then (;-). A lot of water has passed under the bridge.

The last 15 years has been spent help people get aquanted with and use CNC. From Job shops to personal hobbiest.

Now do I know everything that can work ?? NOPE But I do know most things that won't work (;-). That is just from personal experience.

Have a happy life, (;-) TP

[Robertspark]

Now do I know everything that can work ?? NOPE But I do know most things that won't work (;-). That is just from personal experience.

Have a happy life, (;-) TP

but I don't see anyone else asking for this THC change or additions but you Stirling and Keith... (stretching back some time now with this long running post) I would have thought with so many uccnc machines out there complaints would be rolling in over how poor THC is in uccnc compared to what most seem to start out with as mach3 or even those that have retrofitted uccnc to esab tables etc?

I don't have your experience, I have ~20 years experience as an engineer and another 5 or so in the field. what that has taught me is 10 engineers in a room you'll probably get 10 solutions to any problem 8/9 will probably work and most will bring about the same end result, 1/2 may see something the others did not.... we all bring different life's experiences to the party... it's good to value diversity in experience but also accept that sometimes going by the numbers / mainstream leads to a pareto outcome that's acceptable.

thanks I am having a happy life.... just coasting along with this as 1 small hobby of a few others as evening and weekend past times....

just a thought.... as you've got your setup such you can flip from mach3 to uccnc, how about posting some cut examples showing cut quality between the two setups? demonstrating your issues? couple of photos or a video clip. clearly cncdrive are not seeing your issue and other reported issues are scarce, or at least cncdrive are not getting sufficient complaints to require change or priority to effect urgent changes

[beefy]

I am sure that if accel is set high enough the THC side will work ok. But with that same setting teh Zaxis side does not work well.

Terry,

does not work well in what way. Need a bit more info to understand that.

As Balazs has mentioned, all the software can do is immediately give out the step pulses at a fixed frequency (infinite acceleration). >> IF << the software is doing that, it cannot do no more.

I'd buy yourself one of those $10 logic analysers off Ebay. I've used my little cheapy heaps to monitor step pulse streams when I was testing synchronous outputs, but I can't remember checking the step pulse stream when setting acceleration to infinity. Got to dash out to work but I think all my talk on this matter was about how severely delayed (based on calculations) the THC reaction was with acceleration applied.

Robert,

I was very disappointed when you told Terry to go elsewhere, great way to get someones back up and start an argument. Overall, Terrys knowledge on CNC will leave you for dead so telling him to go elsewhere is not helping anyone. He has been responsible for many good changes in not only UCCNC.

The reason you will find only a few people asking for these things is because very few understand it, not because it is not necessarily needed / wanted. However, any discussions which lead to improve UCCNC should be discussed freely. I just wish I had more time to be involved with this one. There are still a lot of bang bang THC controllers out there and if these discussions lead to UCCNC working better with those then I'd say it's worth it for Cncdrive as a company, as well as plasma users with bang bang controllers.

Perhaps we should tell you to go elsewhere when we don't like what you are requesting.

As for the Neuron, I ripped the whole setup out and installed my own bang bang THC design. I simply got sick of poor documentation and the communication barrier when it came to support. Plus the Neuron forum was closed down and you never seem to see Andrey here anymore. You may not know it but I'm not the only one who is a little disappointed with the Neuron. Another big issue was losing control of the Z. With my own bang bang THC installed I now have total control again.

Keith

[Vmax549]

Keith it is great to see that you have your THC up and running. I have waiting a long time to see it happen. (;-)

Robert I am not going to put any more effort into this because it is obvious that nothing is going to change anytime soon. And I have answered many emails from plasma users so it is not just Me, Ian and Keith.

(;-) TP

[Robertspark]

sorry for your disappointment.... I'll try to do better.... all I said was if another tool works better use that one.... problem with all these adjustable wrenches .... no one buys the right tools for the job any more...

it ain't a competition.... I'm sure he has more talent than me and than I ever will ... (ok maybe we just have different talents)... have I said any different ever? it's only a hobby to me and a very small part of my evenings and weekends..... never said any different to anyone ever...

how about providing some comparable evidence between uccnc and mach3 issues affecting 2 users... or is it 3?

thanks for your insight into the neuron genuinely

[cncdrive]

Rob,

I think there is a missunderstanding here again.
Terry is right that the stepper can jump step to it's start/stop frequency without acceleration in the step/dir signals without loosing steps. He seems to be using the term "bang bang acceleration" for this.
So, it is possible that they implemented that jump in mach3 to use this advantage of stepper motors.

What I've already tried to describe a few times that we will also use this advantage of the steppers in the new profiler, just in a bit different way...

[Vmax549]

Hi Keith I meant to ask you if you had done anymore developement on your dot matrix plasma printing board you created. It was a very interesting function for plasma marking.

(;-) TP