Advanced Search

Hello, I am working on a little project.So far I made it only for WinNC Sinumerik, but how usefull could this be once finished?Currently since I have just started the project, it can only do CatiaV5 aptV1.0 but Autodesk has a really good post processor open source code. Also there are some functions missing in Catia, bc I am waiuting for the GPU for my pc to arrive.The idea is to use the free APT output from Catia and translate it to needed G code.Here is the git repo, I am currently yet to finnish my website when done so it will be free to use it on.github.com/karlo-c277/APT-Gcode

Hey tux CNC

Thanks for the feed back

This software is still getting worked on. It was just made for me but hoping to help others also.. Thanks for the feedback. And keep adding to it as you test and I'll try fix stuff if that's possible.

About the sizing yes made for axis so it's a nice fit on my screen.

www.deskproto.com/order/prices.php

It's going to very difficult to troubleshoot the basic setup by running random gcode files. You need to take a step back and simplify things so you can actually wrap your head around what is going on.

First you need to verify that your home position is really putting the arm in the pose it should be. Which means the pose shown on the drawing you posted earlier. If your flange is not correctly oriented to the base plane (ie parallel or perpendicular to your table) then you need to adjust your HOME, HOME_OFFSET values in the INI.


Once you have verified that the home position is actually correct, you can check your DH parameters by positioning the arm in different simple poses in joint mode, then switch to world mode and check if the cartesian coordinates in the DRO make sense. Simple poses would be those with joint angles like 0°,90°,180°. Make a diagram on paper, calculate the theoretical XYZ position using your robots link lengths and compare that to the XYZ values in the DRO.
Small inaccuracies are to be expected but if you have a rotation direction or a link direction wrong then your values would be way off.

Maybe this helps:
forum.linuxcnc.org/media/kunena/attachme...049/oracchanger.comp

leexi wrote:

hi,
with Pulse and direction top speed and precision calculus are clear  but

But how to calculate the bandwidth on a Ethercat servo drive and precision?
let say leadscrew pitch 0.100inch encoder servo 10000 ppr?
if bus cycle time is 1000000 and refClockSyncCycles=1
how to determine the top speed IPM and minimal resolution in  Inches (minimal cut).
 

With ethercat servo drive operating in velocity mode, your main limitation will be the servo's rated/max speed. The resolution limitation will be time based, if I'm correct LinuxCNC EtherCAT will have something like a 2mS feedback latency on a 1mS thread, so this will limit your positioning accuracy during very fast moves. I am not aware that a regular machine tool is capable of reaching this speed limit.
Here is a detailed explanation how it is timed.  

cmorley wrote:

When I looked at this and it seems you have both encoders connected to index-enable.


 

I agree this sounds off. I suspect it will very likely always find the one index first, and I expect that to be the servo index, unless home switch is quite near to scale index. I think ideally you'd want to use only the scale index.

Hi all,
Attached please find a pdf describing the math for the proposed jerk limited planner to be added. It is done by AI, and I want to put it up for community comments.  
I would be happy to discuss the approach and incorporate suggestions and make modifications to this plan as the discussion evolves.
-automata

I wanted to add this to our docs some where for a guide to others.
When I looked at this and it seems you have both encoders connected to index-enable.

This seems wrong in my head, as it would depend on which encoder index fired first.

Any opinion or insight?
Thanks

Hi
i recently acquired a Denford lathe and am wondering if the comp is still around?
the wiki download is ending in a error 404. 
The only other similar thing I found was this link: 
www.machinekit.io/docs/developing/toolchangers/
But I am not sure it is the same thing.

Does anybody have access to the component from the original Wiki willing to share?

kind regards

2.9.10
Thank you for remind us to update the documentation.

I have a lot of questions for you, but no answer.

Hi all,

I just have a quick question regarding what version I should use for LinuxCNC. In your guide you say that version 2.9.8 should be used, but in the download section you say that 2.9.10 should be used. I just would like clarification on which ISO I should download and use.

Thanks

Does anyone know where I can get a free license for DeskProto 8.1?

leexi wrote:

hi,
with Pulse and direction top speed and precision calculus are clear  but

But how to calculate the bandwidth on a Ethercat servo drive and precision?
let say leadscrew pitch 0.100inch encoder servo 10000 ppr?
if bus cycle time is 1000000 and refClockSyncCycles=1
how to determine the top speed IPM and minimal resolution in  Inches (minimal cut).
 

In amateur machines, none of this matters.
You can count it for hours and buy a Chinese ball screw with a backlash  0.1 mm like me...