[Chmfhm]

I've had a lot of problems since I got the chinese 3040 cnc machine for metal and wood 3d carving. Company has very poor support

Machine comes with 1.5kw water cool spindle.
Motors on z axis is 57hs76 2804a8 d22. And motors are in xy are 57hs100 2804d8 with all stepper drivers dm566 breakout board bsmceo4ured usb


Whenever I do 3d carving, the issue of gaining z axis comes up. If I run same gcode on another machine heen, then there is no problem. I have done a lot in this regard so far.

This problem is only with 3d carving. On 2d it works good


I am going through a great loss. Is there any solution to this problem so that the z axis gaining and the motors that get hot can be fixed.

I checked the feed and speed and plunge rate by keeping it to a minimum but there is still a problem with gaining z axis.

Here is link of my problem with example of z gaining

https://drive.google.com/file/d/11yloEN6g-2z0EFRsanhD9nJz65wNBSWl/view?usp=drivesdk

Also in video you can check another problem when I start spindle my whole laptop start lagging also mouse cursor start lagging I check this with other versions of mach3 also check this on other 3 different laptops but it still lag while spindle running.

Also company suggested me 320 steps with 2400 velocity and 240 ac acceleration on all motors. After running 30 to 45 minutes all motors get very hot but touchable

[CNCMAN172]

Sounds like you might have some EMI noise issues, but that is not causing the axis to heat up

[Chmfhm]

Sounds like you might have some EMI noise issues, but that is not causing the axis to heat up

And what cause z axis gaining? Is this also emi noise issue ?

[mactec54]

And what cause z axis gaining? Is this also emi noise issue ?

Yes it can be EMI noise, from bad wiring and Grounding, check that the cutter is not moving out of the collet, if not correctly torqued up the cutter can also get pulled out

[Chmfhm]

Yes it can be EMI noise, from bad wiring and Grounding, check that the cutter is not moving out of the collet, if not correctly torqued up the cutter can also get pulled out

I install emi noise filter on my 220v and also take out breakout board from controller box and sit it aside now laptop or software lagging is finished.

I will try a 3d cut later hope it will work well. If problem remain same then I'll reply back

[Chmfhm]

And what cause z axis gaining? Is this also emi noise issue ?

I re-checked the cnc machine on 3d toolpath for 3d carving. Before that I installed emi noise filter on my 220v line and removed the BOB from the main panel. It ended up logging my system or laptop. 3d carving is better than before but Z axis is still gaining. Can you tell me what the problem might still be? I have checked that the spindle speed does not remain stable up to 23000rpm. I am also sending a video link in which you can see clearly thar rpm goes more or less around 500rpm to 1000rpm. One more thing I did not ground the machine or emi noise filter.

https://drive.google.com/file/d/1yvg4yh4_UqZ0A4kZtgx1tPPwFV9DbEAe/view?usp=drivesdk

- - - Updated - - -

Yes it can be EMI noise, from bad wiring and Grounding, check that the cutter is not moving out of the collet, if not correctly torqued up the cutter can also get pulled out

And what cause z axis gaining? Is this also emi noise issue ?

I re-checked the cnc machine on 3d toolpath for 3d carving. Before that I installed emi noise filter on my 220v line and removed the BOB from the main panel. It ended up logging my system or laptop. 3d carving is better than before but Z axis is still gaining. Can you tell me what the problem might still be? I have checked that the spindle speed does not remain stable up to 23000rpm. I am also sending a video link in which you can see clearly thar rpm goes more or less around 500rpm to 1000rpm. One more thing I did not ground the machine or emi noise filter.

https://drive.google.com/file/d/1yvg4yh4_UqZ0A4kZtgx1tPPwFV9DbEAe/view?usp=drivesdk

[mactec54]

I re-checked the cnc machine on 3d toolpath for 3d carving. Before that I installed emi noise filter on my 220v line and removed the BOB from the main panel. It ended up logging my system or laptop. 3d carving is better than before but Z axis is still gaining. Can you tell me what the problem might still be? I have checked that the spindle speed does not remain stable up to 23000rpm. I am also sending a video link in which you can see clearly thar rpm goes more or less around 500rpm to 1000rpm. One more thing I did not ground the machine or emi noise filter.

https://drive.google.com/file/d/1yvg...w?usp=drivesdk

- - - Updated - - -






I re-checked the cnc machine on 3d toolpath for 3d carving. Before that I installed emi noise filter on my 220v line and removed the BOB from the main panel. It ended up logging my system or laptop. 3d carving is better than before but Z axis is still gaining. Can you tell me what the problem might still be? I have checked that the spindle speed does not remain stable up to 23000rpm. I am also sending a video link in which you can see clearly thar rpm goes more or less around 500rpm to 1000rpm. One more thing I did not ground the machine or emi noise filter.

https://drive.google.com/file/d/1yvg...w?usp=drivesdk

Check to see if the 4th pin on the Spindle is Grounded to the spindle body, and that you have a ( 4) wire shielded cable from the Spindle to the VFD Drive

[mactec54]

Check to see if the 4th pin on the Spindle is Grounded to the spindle body, and that you have a ( 4) wire shielded cable from the Spindle to the VFD Drive

You need to check what I posted above

[mactec54]

Looking at the first video again, check the the cutter is not moving out, although this would be more tapered if this was happening, check the work piece is not moving also

Can you post the code just before the step and just after the step, just a few lines of the code text is good.

[Chmfhm]

Looking at the first video again, check the the cutter is not moving out, although this would be more tapered if this was happening, check the work piece is not moving also

Can you post the code just before the step and just after the step, just a few lines of the code text is good.

In the first video,
I stopped the cycle in mach3, turned off the spindle myself, and moved to checked how much the z axis has gained.

Now I just pull off the spindle wire from control panel and swap the x stepper drive with the z stepper drive and then air run gcode file in mach3. I also removed the power supply from the control panel.

Still The problem is also coming in the z axis. Still z axis gaining I am suffering a lot of stress because of this problem

[HamDesigner]

What happens when you slow things down? I'd test it with less aggressive and slower settings all around (speed, acceleration, etc.) and see how that works.

[Chmfhm]

What happens when you slow things down? I'd test it with less aggressive and slower settings all around (speed, acceleration, etc.) and see how that works.

I checked with that like velocity from 2400 to 1500 acceleration from 230 to 140. Even plunge rate from 25mm/ sec to 8mm/sec

[CNCMAN172]

Does this machine use a USB interface versus a parallel interface card? If this is a USB interface, my bet is you are getting EMI interference causing the z axis to move just slightly as you try to move. You might be able to resolve this by purchasing a USB isolator, which is cheap about $15 and it isolates the laptop from the machine, so no EMI can cause Mach3 to do strange things.

Russ

[Chmfhm]

Does this machine use a USB interface versus a parallel interface card? If this is a USB interface, my bet is you are getting EMI interference causing the z axis to move just slightly as you try to move. You might be able to resolve this by purchasing a USB isolator, which is cheap about $15 and it isolates the laptop from the machine, so no EMI can cause Mach3 to do strange things.

Russ

Yes it is usb interface and usb cable is sheilded and has emi/rfi attached 6 inches from computer end connector

[mactec54]

Yes it is usb interface and usb cable is sheilded and has emi/rfi attached 6 inches from computer end connector

Can you post some close up photos, of the wiring, I may see something that is causing the problem.

[CNCMAN172]

Chmfhm,
The fact you have a shielded USB cable with ferrite beads at both ends is great but this does not isolate the PC from the CNC electrically. I had the same crazy issues going on with my USB KFLOP board it worked but would do strange little moves and suddenly lose contact and re-establish it was making me tear my hair out. Someone on Cnczone metioned USB isolators and I was out of options so I ordered one which was under $15 and plugged this little board right before the PC and the USB cable plugged into the isolator. Just like magic my issues disappeared. I still use it today. This is an example of what they look like there are many makers of these units.

https://www.ebay.com/itm/18301419381...QAAOSwDEBcRWGU

[mactec54]

Chmfhm,
The fact you have a shielded USB cable with ferrite beads at both ends is great but this does not isolate the PC from the CNC electrically. I had the same crazy issues going on with my USB KFLOP board it worked but would do strange little moves and suddenly lose contact and re-establish it was making me tear my hair out. Someone on Cnczone metioned USB isolators and I was out of options so I ordered one which was under $15 and plugged this little board right before the PC and the USB cable plugged into the isolator. Just like magic my issues disappeared. I still use it today. This is an example of what they look like there are many makers of these units.

https://www.ebay.com/itm/18301419381...QAAOSwDEBcRWGU

He does not have a USB issue, or the other axis would have problems as well, there is nothing wrong with adding what you suggest, I would be very surprised if it solved his problem

[CNCMAN172]

Mactec54,
It is true noise could impact other axis as you suggest. On my machine I had strange stuff happening only on Z axis as the spindle moved around those cables got closer to EMI sources. This also could be the weight of spindle causing motor to slip due to weight it is being asked to support. A counterbalance shock might address the issue. A good test would be remove spindle and check and see if it keeps dropping

[mactec54]

Mactec54,
It is true noise could impact other axis as you suggest. On my machine I had strange stuff happening only on Z axis as the spindle moved around those cables got closer to EMI sources. This also could be the weight of spindle causing motor to slip due to weight it is being asked to support. A counterbalance shock might address the issue. A good test would be remove spindle and check and see if it keeps dropping

If there is EMI from the spindle, it's from incorrect wiring, he still had the problem without the spindle and other axes connected

I think he did remove the spindle.

If you watch the video, it moves all by itself after the machine has stopped, it's getting a signal to move from the control, this could be bad Optos as well, although he tried another Board and it still happened, it could be the stepper Drive also

[CNCMAN172]

Very strange issue. Since you did not have the spindle running, I am going to venture a guess this is not EMI interference, however it can still happen from other sources. I am leaning towards some kind of mechanical issue, can you check your bearings on the Z axis and see if anything in loose. You also need to check backlash on the Z axis to see if that is playing a role. Did this machine every work correctly?