Printable View
HI
OH Dear!
Luckily im just setting up, praticing and learning CNC
Ive gotten so far but im stuck on this
Highlighted in Pink was my 4th Pass using ASPIRE Then to G Code using Mach 3
The 4th Pass went well off to the Left! and ruined my test peace!
The 1,2 and 3rd passes all went okay highlighted in black
Does any one know why the 4th pass decided to start off at a different position?
many thanks, and appreciate any help given
adam
oh man
Never had so much hassel attaching an image to a forum (chair)
Click on Go Advanced at the bottom of the text window and scroll down to Manage Attachments (or just click on the Paper Clip icon). From there browse to your photo(s). Hit the Paper Clip dropdown to insert the photo(s) where you want them in your text.
attached is the image!!
thanks too difalkner
I would run the program again this time doing an air cut, no wood or anything. Single step the program and put a piece of paper on your machine and mark where the cutter moves. When u get to the forth pass you should see it move the machine in the wrong position. You can also run the gcode on a simulator which you can download for free and determine if the gcode is correct
Russ
Thanks Russ(wedge)
But running it again doesnt answer why it did this
Anyone else have any ideas please?
I will try some new G Codes etc
But it would be handy too see why it did it in the first place
adam
I would assume that the problem isn’t coming from Aspire. You can simulate the cut in Aspire.
Two things would cause this from the machine. Stepper looses steps or stepper shaft not tight.
Why those aren’t issues is they happen under load not between passes.
So my guess is that Aspire is sending some code that your controller doesn’t understand
I’d start removing lines of code and see what happens. Also try a simple shape like a square. Or code it by hand. Have fun, it’s a good way to learn.
Sent from my iPhone using Tapatalk
Stepper looses steps or stepper shaft not tight.what is that? and how does it loose steps?
My thoughts were
It could be the way i saved the G-Code in Aspire? as there is sevral options
It looses steps, but not sure how that happens
Saying this i was hoping someone elese has had this happen to them before
Today i will try more new shaps, and texts
and will update
But always handy to know 100% how it happened
Thanks for the input guys , cheers
Start a process of elimination to find the problem. Use a gcode viewer to look at your code first. I use https://ncviewer.com/ but there are plenty to choose from. It will tell you if it is your machine or the gcode.
mmmmmmmmmmmmmmmmmmmmmmm
Sadly happened again!
I saved as G Code Mach 3
and even on my first cut it went haywire!
I then said lets try no G Code and a straight cut using my keyboard
I pressed the arrow key firmly and it will move perfectly >>>>>>>>>>>>>>>> Then it just stopped!
so tried a few times it will move using the keyboard arrow key so much then it just stops!
This is making me think its hardware issues somewhere?:drowning::drowning:
The Y Axis in MACH3 Was ticked and the X wasnt! in DIR LOW Active
i just unticked it, dont think that would of helped any as the X wasnt ticked
Calm down, these are simple machines. First off, you need to be methodical in your approach. Try jogging each axis in turn to see if that works OK. Does it stop in the same location? On the one(s) that fail, disconnect the motor and move it by hand to see if there is any binding. (that's my guess but you've presented zero info about your machine...) If it is a dual motor moving gantry, maybe it racks?
But before anything else, make sure everything is tightened up. Even if it seems solid, even a small amount of slop can cause problems.
Thats a great reply, thanks philba i had it working last year must be something simples
But will try that now!
This appears to be binding in your machine. You can so some simple gcode commands on your machines, such as follows:
First home your machine, did it get home successfully?
Now in your MDI entry, type
G1 X5 F50 does it move to the right five inches?
G1 Y5 F50 does it move in the Y direction five inches?
With the machine powered down can you move the X and Y axis smoothly? You could have a loose coupler from the stepper motor to the ballscrew or leadscrew.
Post a picture of your machine.
Russ
OH GOSH
so
Ive just tried
A new postition on the CNC Table with a basic llines to be cut, 1st cut went okay then half way through the second cut it went way off and again and just stopped/paused!
So i then
Stopped the G Code and Closed the g code
Then being safe i switched on the router and then
Pressed the page UP To left the Z AXIS UP
And guess what THE Z AXIS
SPUN UP MEGA FAST! Faster than ever, dangerously fast until it was spinning round the shaft as couldnt go up higher, so i switched the hole thing off
I wonder what it is? Im thinking its something to do with my NVUM USB Controller from CHINA?
Thanks everyone i really appreciate all your inputs, Thanks to each and everyone who is replying
The smiling face on the Plywood was made last year and worked ok
I have just moved all Axis by hand with the machine off, its a bit stiff but moves okay!
Ive still to try the MIDI Entry
Its weird how it cuts okay for the first 1-2 passes! then goes bad on me on the 2-3rd pass
Thats why i think its not the actual Machine guides or Nemas etc as it makes the first line okay
Im thinking its maybe
How i save the G Code?
The Chinese NVUM Cntroller via USB to my PC
Possibly the G code itself but i doubt that!
Then how did the Z Axis shot up so FAST Like suddenly speed up real fast hasnt done that before!
Dangerous i want to get it fully working 100% make some things then sell it when i can confindetially sell it!
Then i will build a newer smaller one for myself from scratch
- Adam:eek:
better image of panel
https://maxcdn.cnczone.com/images/attach/jpg.gif
Agreed but I think our friend is all over the map. It probably is binding though it appears to be a low end Chinese machine so probably needs a full round of tightening and such. It may not have been assembled exactly to spec either.Quote:
Originally Posted by CNCMAN172
Adam: stop what you are doing and focus on one issue - binding. Try what Russ (and I) suggested. Try to figure out if each axis works correctly. Verify each axis in turn.