Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: Hanjelle on September 10, 2019, 02:10:41 PM

Title: Go to Zero extremely slow, please help
Post by: Hanjelle on September 10, 2019, 02:10:41 PM
Hi,

I am new to this forum and really hope someone can help me with the following problem:

I recently bought a cnc plasmatable. Everything worked as it should in 'dry runs' (without the plasma turning on). As I discovered my old plasma source had HF ignition really caused problems with the cnc system. On ignition the conection with the Xulifeng motion Card was lost everytime.  I tried to improve earthing (is this the right term?) but in the end I had to buy a source without HF.

After installing the new source almost everything works as it should. When I run a G-code or use the arrow keys the machine works at normal speeds. If I use the 'go to zero' button however the machine moves extremely slow. Almost invisible movement. I tried to change settings but ran out of ideas.

Could the HF ignition have damaged the hardware? That seems unlogic or strange because the speeds are normal with keys and G-codes? If not damaged, does anyone have an idea how to solve it?

Kind regards
Title: Re: Go to Zero extremely slow, please help
Post by: joeaverage on September 10, 2019, 03:00:55 PM
Hi,
when Mach starts it defaults to a low 6% of max speed.

You can change that by including an F********* word in the initialization string that runs at startup.

Craig
Title: Re: Go to Zero extremely slow, please help
Post by: Hanjelle on September 10, 2019, 03:22:01 PM
Hi,
when Mach starts it defaults to a low 6% of max speed.

You can change that by including an F********* word in the initialization string that runs at startup.

Craig

Hi Graig, thank you very much. I tried this option already by including F1000 in the initialzation string. Didn't do a thing unfortunately. I restarted several times but no luck!

Title: Re: Go to Zero extremely slow, please help
Post by: Hanjelle on September 13, 2019, 03:37:25 AM
Is it possible that the problem is caused by soft limits? My machine does not have physical home switches but worked fine a month ago. Maybe I accidentelly changed setting or something. My table is 2x1 meter. Actual settings in home/soft limits are:

X: no reversed, Soft max 2000, soft min -100, slow zone 1.00, home off 0.000, no home neg, auto zero, speed 100
Y: same but soft max 1000

Everytime I startup the machine I position the machine at the right place and zero X, Y and also the machine coordinates.
Title: Re: Go to Zero extremely slow, please help
Post by: ZASto on September 13, 2019, 04:48:13 AM
If your machine have no home switches then soft limits are inoperative.
Title: Re: Go to Zero extremely slow, please help
Post by: Hanjelle on September 13, 2019, 04:54:05 AM
@ZASto

Okay, so that can't be the problem? I was assuming that without the physical switches te machine would use the 'ref all home' zero point as a reference to zero end the soft limits would work with that.

Do you have any other idea what the cause of my problem can be?
Title: Re: Go to Zero extremely slow, please help
Post by: Overloaded on September 13, 2019, 07:46:02 AM
  I was assuming that without the physical switches the machine would use the 'ref all home' zero point as a reference to zero end the soft limits would work with that.

You are correct, that is how mine works.

Not sure tho about your speed issue.
Are you running a legal licensed version ?
 :)
Title: Re: Go to Zero extremely slow, please help
Post by: Hanjelle on September 13, 2019, 07:47:24 AM
Yes, i do have a legal license. So that can't be the problem i think
Title: Re: Go to Zero extremely slow, please help
Post by: Overloaded on September 13, 2019, 07:51:53 AM
Rename and post your XML file and I will try to replicate the problem here.
 :)
Title: Re: Go to Zero extremely slow, please help
Post by: Hanjelle on September 13, 2019, 07:54:32 AM
thank you! I will post it in a few moments
Title: Re: Go to Zero extremely slow, please help
Post by: Hanjelle on September 13, 2019, 08:01:35 AM
This is the xml.file. I copied it without renaming it. Really curious if you find something! Many thanks in advance
Title: Re: Go to Zero extremely slow, please help
Post by: Hanjelle on September 13, 2019, 08:18:29 AM
I had to rename it otherwise it would not upload
Title: Re: Go to Zero extremely slow, please help
Post by: Overloaded on September 13, 2019, 08:23:30 AM
"Go to Zero" is a system function within Mach3.
I do not see any issues with your XML and it responds normally here.
Perhaps it is associated with your "Xulifeng-Mach3-USB-Motion-Card", assuming there is a plugin for it.

Looks good here otherwise.
Regards,
 :)
Title: Re: Go to Zero extremely slow, please help
Post by: Hanjelle on September 13, 2019, 08:59:47 AM
"Go to Zero" is a system function within Mach3.
I do not see any issues with your XML and it responds normally here.
Perhaps it is associated with your "Xulifeng-Mach3-USB-Motion-Card", assuming there is a plugin for it.

Looks good here otherwise.
Regards,
 :)

Thank you! Do you think it is plugin related or hardwarerelated? As mentioned , maybe my old plasmacutter with HF ignition damaged the Xulifeng? Still weird that running a g-code works normal and so do the arrow keys.
Title: Re: Go to Zero extremely slow, please help
Post by: Hanjelle on September 13, 2019, 09:29:02 AM
 can buy a fairly cheap second hand nvum mach 3 controller. Maybe it's wise to replace the xulifeng by that one?
Title: Re: Go to Zero extremely slow, please help
Post by: Overloaded on September 13, 2019, 11:20:47 AM
Hi,
when Mach starts it defaults to a low 6% of max speed.
Craig
.... actually, it defaults to 6.00 units per min.
Inches would be quite "visible", but mm's would barely creep.
Increase override 200% and that DRO goes to 12  :)

What is showing in the attached pic while your machine is invisibly moving after hitting the "Go to Zero" button ?
Title: Re: Go to Zero extremely slow, please help
Post by: Hanjelle on September 13, 2019, 01:39:19 PM
Hi,
when Mach starts it defaults to a low 6% of max speed.
Craig
.... actually, it defaults to 6.00 units per min.
Inches would be quite "visible", but mm's would barely creep.
Increase override 200% and that DRO goes to 12  :)

What is showing in the attached pic while your machine is invisibly moving after hitting the "Go to Zero" button ?

The set feedrate is 1000
Units/min runs between 9000 and 10000
Units/rev is 0
Title: Re: Go to Zero extremely slow, please help
Post by: Hanjelle on September 13, 2019, 01:44:44 PM
I really really don't know what i have done but it seems to work fine now.... Maybe I hit the button softlimits but I cannot imagine that did the trick.
Title: Re: Go to Zero extremely slow, please help
Post by: Hanjelle on September 13, 2019, 02:02:02 PM
I have to come back to that. As I tried to Ref all Home at a better point on the table and moved evetything afterwards the same problem occurs. I dod ref all home and moved the X and Y in the max position. Pressed.go to zero and it was slow again. to
Title: Re: Go to Zero extremely slow, please help
Post by: Hanjelle on September 13, 2019, 03:05:51 PM
I think I figured it out! Each time I change the Ref all Home point on the table, the machine has to run one pass to that point in a very slow mode. Once finished, from that moment on it moves fast and normal.

Can anyone confirm this is normal?
Title: Re: Go to Zero extremely slow, please help
Post by: joeaverage on September 13, 2019, 04:23:46 PM
Hi,
yes that is normal, the homing speed is set in the Homing/Limits page.

Craig
Title: Re: Go to Zero extremely slow, please help
Post by: Hanjelle on September 13, 2019, 04:49:54 PM
Thanks Graig, so after changing the reference point the machine has to make slow passes to learn. After teaching is runs normal
Title: Re: Go to Zero extremely slow, please help
Post by: Overloaded on September 13, 2019, 08:19:11 PM
Thanks Graig, so after changing the reference point the machine has to make slow passes to learn. After teaching is runs normal
According to your XML, your homing speeds are far faster than a creep.
Should not be :
"If I use the 'go to zero' button however the machine moves extremely slow. Almost invisible movement".  (from your first post)
 :)
Title: Re: Go to Zero extremely slow, please help
Post by: Overloaded on September 13, 2019, 08:28:46 PM
Hi,
when Mach starts it defaults to a low 6% of max speed.
Craig
.... actually, it defaults to 6.00 units per min.
Inches would be quite "visible", but mm's would barely creep.
Increase override 200% and that DRO goes to 12  :)

What is showing in the attached pic while your machine is invisibly moving after hitting the "Go to Zero" button ?

The set feedrate is 1000
Units/min runs between 9000 and 10000
Units/rev is 0

So, this is showing while the machine is going to zero after the button press ? ? ? and  ...
 "If I use the 'go to zero' button however the machine moves extremely slow. Almost invisible movement."

I'm at a loss here. Not sure what is going on .
 :o
Title: Re: Go to Zero extremely slow, please help
Post by: Hanjelle on September 14, 2019, 01:55:21 AM
Thanks Graig, so after changing the reference point the machine has to make slow passes to learn. After teaching is runs normal
According to your XML, your homing speeds are far faster than a creep.
Should not be :
"If I use the 'go to zero' button however the machine moves extremely slow. Almost invisible movement".  (from your first post)
 :)

Isn't it possible mach3 or my controller has a build in safety feature? After changing settings fist a slow run?

Maybe it's hardwarerelated after all. But it's working now. I will monitor it for some time and report conclusions here
Title: Re: Go to Zero extremely slow, please help
Post by: Hanjelle on September 14, 2019, 01:58:02 AM
Hi,
when Mach starts it defaults to a low 6% of max speed.
Craig
.... actually, it defaults to 6.00 units per min.
Inches would be quite "visible", but mm's would barely creep.
Increase override 200% and that DRO goes to 12  :)

What is showing in the attached pic while your machine is invisibly moving after hitting the "Go to Zero" button ?

The set feedrate is 1000
Units/min runs between 9000 and 10000
Units/rev is 0

So, this is showing while the machine is going to zero after the button press ? ? ? and  ...
 "If I use the 'go to zero' button however the machine moves extremely slow. Almost invisible movement."

I'm at a loss here. Not sure what is going on .
 :o

Haha, I can imagine that! You should see my face during the whole proces. I am definetely not the expert here but I am also really confused. It does not make sense at all. As mentioned in the previous post I will monitor it for some time

Everybody: thanks for your input so far!!