Version 3.27.1.0 Windows 11
I have just used the cam portion of qcad a couple of times on my imported cnc. Simple doors and a simple plastic part for a packaging machine. I started noticing the machine didn't seem to follow my speed a feed input from qcam. Today I did a simple toolpath. 24" diametre circle.
Profile 1:
24,000 rpm @ 800 ipm
Profile 2:
12,000 rpm @ 400 ipm.
I am not cutting. Just listening and observing. Both toolpath preform identical. Is there a possibility that I have entered something wrong in qcad of I have an incorrect setup? I don't see a speed command in the command line.
Feed Rate
Moderator: andrew
Forum rules
Always indicate your operating system and QCAD version.
Indicate the post processor used.
Attach drawing files and screenshots.
Post one question per topic.
Always indicate your operating system and QCAD version.
Indicate the post processor used.
Attach drawing files and screenshots.
Post one question per topic.
Re: Feed Rate input on post
What is the maximum speed (ipm) of your CNC?
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Win10/64, QcadPro, QcadCam version: Current.
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Win10/64, QcadPro, QcadCam version: Current.
If a thread is considered as "solved" please change the title of the first post to "[solved] Title..."
Re: Feed Rate
Please indicate the post processor used.
Please attach your drawing file and G-Code output.
Please attach your drawing file and G-Code output.
Re: Feed Rate
Good morning Andrew
Thanks for your prompt response. I also sent an email to the manufacturer last night (Blue Elephant CNC). As it turns out the machine is set by default to ignore 'S' (speed) and 'F' (feed). My NK105 G3 controller had a parameter to change. I now have the machine following my g-code. I also see in the list of parameters the max. velocity of the machine is 10,000 mm/min (about 400 ipm) so I may have not seen the change as writen anyway. The machine only reads mm. I need to change my template file so G-Code (G41/G42) (mm) is default. Please confirm by saving the template with this g-code active it will default to it. I have attached the files as requested. I know I am solved but I have a question pertaining to the g-code. I am trying to learn how to read the g-code. I don't know what to open it with. I can read the basics in the command line of Qcad but it does not mean much to me at this point. I don't see anything to do with speed. It must be there as the machine is now following speed and feed as set in qcad. One of the reasons I am asking this has to do with multiple tools. As it is I know how to create the tool paths in Qcad reasonably well. Some doors I make use several different tools. I can't save individual tool paths (or don't know how to). This means I need several files to make the doors. The machine stops at the end of each profile depending on tool use. It would be brilliant if I could somehow write a pause in the g-code so the machine would wait for me to make a tool change and then press start to restart the cutting. Even saving individual toolpaths within the file would be nice.
Thanks for your prompt response. I also sent an email to the manufacturer last night (Blue Elephant CNC). As it turns out the machine is set by default to ignore 'S' (speed) and 'F' (feed). My NK105 G3 controller had a parameter to change. I now have the machine following my g-code. I also see in the list of parameters the max. velocity of the machine is 10,000 mm/min (about 400 ipm) so I may have not seen the change as writen anyway. The machine only reads mm. I need to change my template file so G-Code (G41/G42) (mm) is default. Please confirm by saving the template with this g-code active it will default to it. I have attached the files as requested. I know I am solved but I have a question pertaining to the g-code. I am trying to learn how to read the g-code. I don't know what to open it with. I can read the basics in the command line of Qcad but it does not mean much to me at this point. I don't see anything to do with speed. It must be there as the machine is now following speed and feed as set in qcad. One of the reasons I am asking this has to do with multiple tools. As it is I know how to create the tool paths in Qcad reasonably well. Some doors I make use several different tools. I can't save individual tool paths (or don't know how to). This means I need several files to make the doors. The machine stops at the end of each profile depending on tool use. It would be brilliant if I could somehow write a pause in the g-code so the machine would wait for me to make a tool change and then press start to restart the cutting. Even saving individual toolpaths within the file would be nice.
- Attachments
-
- Circle.dxf
- (188.81 KiB) Downloaded 275 times
Re: Feed Rate
If you use a drawing template for new files, yes.
If you don't use a template, you can also set the default configuration under:
Edit > Application Preferences > CAM > CAM Export > Configuration used for new drawings
You would usually open the G-Code with the software that came with your machine and talks to the controller of the machine.
The S codes in lines N40 and N120 set the spindle speed. The F codes set the feedrate (F5000, F10000, etc.).
Some controllers have a code to wait for some kind of user input (pressing a button, confirming in the controller software, etc.). You'd have to refer to the user manual of your machine or controller for that. Once you know it, you can create a post processor that incorporates that code before a tool change. Feel free to post back to the forum for help.It would be brilliant if I could somehow write a pause in the g-code so the machine would wait for me to make a tool change and then press start to restart the cutting.
You can use the eye-symbol in the toolpath list to hide individual toolpaths. Hidden toolpaths are not exported.Even saving individual toolpaths within the file would be nice.
Re: Feed Rate
KHE,
Remark that the feed for an arc or a circle is also limited by the machine maximum linear acceleration allowed.
It seems that this is usually over estimated and may be the source of positioning losses.
There may also be a arc Feed reduction factor.
That serves to keep the chip load steady ... optimal at the outer side of the cutted area.
Regards,
CVH.
Remark that the feed for an arc or a circle is also limited by the machine maximum linear acceleration allowed.
It seems that this is usually over estimated and may be the source of positioning losses.
There may also be a arc Feed reduction factor.
That serves to keep the chip load steady ... optimal at the outer side of the cutted area.
Regards,
CVH.