I think that o am probably going to run open loop with the best servo drive tune due to the fact that the motion is smoothest. I can absolutely tell you that in full closed loop at this point in time that there is too much noise transferred into the machine from the control managing the following error corrections. what is causing it to me could be a number of things, as you stated, drives, trapezoidal acceleration, bandwidth, etc.. I'm still new to all of this and still learning, so each day brings more Information to work with. oddly enough, Clint has been running machine with a completely untuned drive since day one and if it is anything like mine the max following error was Astronomical.. yet he managed to make parts that were to tolerance. a mystery to me.
I have the accelerated feed forward in the drive set to zero because it made things worse. the position feed forward is set at 100% and position gain at Max but once position feed forward is at Max the gain plays less of a part it would seem. changes to it seemed to make little difference unless they were really big.
I have some direction from PCW at mess to try using the encoder as a low bandwidth feedback loop similar to a linear encoder, I'm researching now how to configure that in the Hal to test and will report the results! thanks for you input, very insightful!
Chris
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Oh this is weird was viewing on Tapatalk and a lot of the conversation was missing. Anyways it’s interesting that closing the loop makes it worse. I think it’s better to close the loop otherwise you are losing some of the Benefit of servos.
So I scanned the thread since I last visited a couple years ago. What's the status Runfa Machine Company and this machine? runfamc.com is no more Did the machine ever become a finished product that could be ordered?
in order to learn... not save money.
Hey guys, sorry for the long delay, but I focused on some new projects, they were machine related for this machine and others and will hopefully add some value to the cnc community! I will just toss these out here for some teasers, it is very close to being tested on the machine, currently we are finishing up doing testing in simulation mode to find bugs and things we missed or that need to be added. hopefully it makes things easier to use on the machine, I certainly now am very happy that i stayed with Linuxcnc as this project has made the learning experience high but well worthwhile and I now feel extremely comfortable with it and have the ability to add the things i want both in the interface I designed with the help of Hazzy and Turboss from the Linuxcnc forum and with the control side. it really is a great feeling to know I am not locked into a control that requires an act of congress to add something too and this one can be changed and adjusted to suit my style and needs! Hope you enjoy!
More..
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Nice looking screen set you got there.
Looking forward to getting started with LinuxCNC myself in the next few months I hope.
I like those screensets, are these built under QtPyVCP with the help of Kurt and Turboss? I have been using LinuxCNC for a few years and just got started with making my own screensets, I can't believe how much power LinuxCNC has, it is literally completely customisable! If you're open to it I'd love to have a look at a copy of that screenset. More than understand if you'd rather not though
Firstly I wanted to congratulate you on your achievements since getting your machine. You have done amazing job.
I'm in the process of rewiring a 500Kg desktop mill switching it from Mach3 to LinuxCNC and would love to try your screens out.
The other comment was the Servo control, when your had LinuxCNC doing close loop had you disabled the close loop on the servo drives ? and I mean have you disconnected the encoder wires from the drives ?
Cheers
MIke
Any update on this? thoughts or comments on the purchase? I'm looking at similar machines
hi Icvette
I would like to know from you
are you satisfied with this machine
would you buy from this same supplier again
what would you do different
I wanted to PM you
but always get this message and don't know where to change settings
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I recommend going with still over a none branded non us company. The after sport had been horrible from this manufacturer so no I would not recommend runfa.
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New graphical user interface in testing wanted to post up a teaser video. What I can recommend strongly after using it in testing the probing routines of the interface is this touch probe from Drewtronics, its bang on for accuracy and repeatability and economically priced for the quality and craftsmanship put into them. Highly recommend!!
Hoping to get some more videos up soon!! Been a long time making with the new interface build, anxious to get some chips flying!!
Chris
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Another video and overview of the reparability of the machine and probe as well as a little overview of the probing functionality of the new gui!
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Is this the Pathpilot GUI or did you go with one of the myriad LinucCNC GUIs? It looks fantastic! I must admit that having left my original LinuxCNC system in the box and opted for Centroid and Newker on my 2 machines instead, I'm thinking I should have held firm.
I don't know if you are aware that there is now a Fusion 360 post processor that supports WCS probing functions for PathPilot. This allows you to probe mid-operation to pick up accurate dimensions.
Thanks for posting this epic adventure! I hadn't noticed it until now and it's inspiring to see how others have gone about creating their own special solutions.
This is LinuxCNC with a GUI he and I think some others have been working on.
It's been some time since I spent any time on the LinuxCNC forum. I see there is another major thread there on the development of this GUI. It's great that you put so much effort into sharing your work for others to learn from and give inspiration!
https://forum.linuxcnc.org/41-guis/3...derway?start=0