[Dean448]

Just for reference in Mach3 or Mach4 I use the following post in Vectric:
Mach 2/3 Arcs (mm)(*.txt)

Has anyone recommended that you post your gcode to this thread?


Sent from my iPhone using Tapatalk

[adamfromUK]

Thanks one again guys, very much appreciated

Okay a good update!

I made the internal cabinet tidy

I recall someone saying once that the Chinese controllers via USB can be temprimental and always better with CAT Style plug or the older style big parrell plugs

So after i did that i made a new G Gode and sent that to the machne

It cut it perfectly on 2 x passes

But

It was using Softcore board!

So im not 100% but maybe its one of these three things!

1: Dodgy interference via USB Cable but it is a sheilded cable im using! Interference from another source, or simply its cause its a USB out from controller to the PC

2: The motors struggle on the 3rd pass on thicker wood! will require further testing though

3: G Code issue?

im still thinking 1,2 is the culprit

The binding seems to happen and puts it off course, but this new cut was 100% but thats after i moved the NVUM controller to the rear of the enclosure and checked all the cables etc and it was only cutting softcore board not thicker dense ply


Will update guys!

the new okay cut!

[adamfromUK]

here is how i saved the new g code

then sent to mach 3

[Dean448]

I’d recommend using the post I referenced for Mach3.

USB can indeed be ‘dodgy’. Don’t try using USB cables over 1m. Ethernet is much smoother at longer lengths. However it’s a noise issue with USB and wouldn’t happen at the same spot in the cut over multiple trials.

[CNCMAN172]

If your using USB interface, you appear to have some EMI issues. Get two EMI donuts, these look like life saver candy but they are magnet cores. Loop each end of the USB cable through the donuts about three or four times. Make sure they are on both ends and you will see a huge improvement in EMI interference.

Russ

[adamfromUK]

Well this morning i made a quick sign and was very happy it done okay on two passes:
DSC00185.jpg

However on my second cut this afternoon it went haywire again lol


So not sure is it my G Code? or is it Interference? or is it dodgy nema 23 not having the stregth to pull over the wood, i think not as it seems to

Just go way off what i want it to do!

so what you guys rekon?

Is it my dodgy G Code? maybe im saving it wrong ??? as there is a lot off different options to save as?

Or is it interference? bad connection etc

Screenshot 2021-05-22 170828.jpg

what it looks like on aspre

what it looks like when it was cutting


DSC00186.jpg

[CNCMAN172]

I think you have already proven it is NOT the gcode. It cut some previous examples fine. You have interference from EMI, get some EMI donuts or a USB isolator kits to address the noise.

Russ

[routalot]

I'm a bit late to this thread and wouldn't claim to know the answers.What I always believe is that the simulation of the program shows you what the machine will be receiving instructions for.As long as you pick the correct post processor and the mechanical aspects of the machine are sound,it comes back to the quality of the pulses received at the steppers.As you have found by moving some components around things seem less bad then a bit more focus on shielding will probably pay dividends.Just out of curiosity,are you located very far from the nearest sub-station and with tree branches brushing against power supply cables?

[adamfromUK]

HI


I did the USB With ferrite cores and tidyed up the control panel

It did one cut on plywood 3 x passes 100% ok

Then i made another cut this time on perspex and it coked up straight away

Im thinking maybe its the Feedrates now on Mach3

Or motor tuning or

Belts are too tight and struggle under a load?

As its cocked up a few times on perspex or the deeper cuts

mmmmmmmmmmm

Im not giving up guys!

Not near a sub station or that cables underground!

Pic on wood cut okay perspex ballsed up

Pic showing cable track maybe too tight?

Pic showing inside cabinet been using EMI power and ferrites

[adamfromUK]

MMMMMMMMMMM

Could also be the Windows 7 PC

As the Wireless Mouse and Keyboard dont work 90% of the time, PITA now

Im going to try this on another PC soon! (chair)

[routalot]

How about a bit more information about the depth of cut and feed rates you are using?You might be asking the machine to do more than it has the power to achieve.Most of the commercial cutter suppliers will have recommendations for their hardware when used on commercial machines and trying to match them on a hobby machine may lead to disappointment.

[adamfromUK]

Thanks for the replys

Yes that is what i was thinking also! Maybe its under too much load

This was a UK Made machine called routout CNC

I changed the motors to Nema 23 but there is only one on the Y axis

Today im going to try on a new PC

At least that will rule out my PC

I then also have a NEW contoller board to try China nMotion controller

If i try these two things and still get issues we can rule out the PC and controller and narrow it down too

In no particular order lol

Noise

Mecahnics belt too tight, tight bolts nuts

and of course not enough power!

Will update

Thanks guys!

[adamfromUK]

FFS!

Its happening still


I just installed a new motion controller
ZKMotion Mach3 4 Axis USB CNC Motion Card

And now my drivers use 4 x wires insted of 3 before

Still im getting cocked up signs lol

I sit Motor tuning? this is something im still working on guys!

with the new controller! Seems to do its own thing and doesnt follow the sip[le GCode as attached

any ideas guys




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M30

[adamfromUK]

I THINK!!!!!!!!!!!!!!!!


Ive just made a major discovery!


When switched the X Axis and the Z Axis is SOLID! When you Push or Pull these two axis it doesnt move!

The Y Axis Moves manually Easily bby about 1cm back and forth! Now that must be the issue?

Somewhere somewhow the Y Axis is moving freely by about 1cm before being the same as the X and Z

So it has to be something to do with my Y Axis

Im not sure now if its mechanical or its a fault in the motor etc, But i think its been established that its a mechanical fault somewhere on the Y axis

wherever its the belt, bolts, nuts or nema 23 issue!

Y AXIS I think is the culprit

Working on that now!

[adamfromUK]

THANKS VERY MUCH TO ALL THE PEOPLE THAT HELPED ME ON THIS!!!!!!!!!!!!!!!!

SO


It was simply a case of Y AXIS NEMA 23

Dropped down from the holder


They dont make those Nema 23 easy to mount as its very tedious trying to tighten them without snapping the screws! that hold the nema in place a little more space to mount the nylocc nuts and tighten them would be better!

Still so happy now!

I did 4 x 3mm around that passes and cut very well after i lefted the Nema 23 up! I will make sure that the belet is tightened always!

So guys the answer was if you have play in your AXIS Check the belt, rods etc!

If you get messed up G Codes like mine lol

Maybe a Motor isnt tightened

[routalot]

It must be a huge relief.It hardly ever comes down to a fault with the CAM program,as long as you select the correct post processor amd you could have downloaded the free Camotics program to verify the code.Which would have set you on the path to checking out the mechanical aspects of the machine.I suspect a regular inspection of the machine will be part of the workshop routine in future won't it?

[adamfromUK]

HI routalot


I will be making good use of it for 2-3 months so i can sell it knowing that its 100%


Im going to build a new one from scratch using Rexroth strut and the chinese heavy duty spindle so i can do alumimum and other woods!

I wanted to do another test cut before replying inase it ballsed up again but im sure that its all for now

Over the next few weeks hopefully master the homing and limit switched etc and my Z still lifts too high so will look into that next!

Then the homing positions!

Wooh so much work and too learn! But im multi tasking with other things, making it taking me much longer!

But im super happy to have made this small cut! i think my motors need tweaking also a bit grunty!

But the main thing is its falling the paths and im very pleased! ordered new stainless steel HEX Bolts today M5 25mm TO HELP SECURE THE NEMA 23 BETTER SO doesnt slip again! that was the issue the nema 23 had moved down making the belt slack!

Solid now

Thanks everyone who replied to this topic!

I will be back with new questions no doubt lol

Adam