Machsupport Forum

Mach Discussion => General Mach Discussion => Topic started by: rideright on February 07, 2012, 06:27:41 AM

Title: Plasma Z axis raises when torch is fired
Post by: rideright on February 07, 2012, 06:27:41 AM: I have a PlasmaRout table with a MP3000 torch height control. It has a floating head on the torch. I have set my offset distance in my postprosser and it looks good. The problem I am having is the torch goes down makes the switch raises and rezeros. It then moves to the pierce height but when the torch triggers it raises again then drops to the cut height. Is this a setting in Sheetcam, if it is I can not find it in the G_Code, or a Mach setting?
Title: Re: Plasma Z axis raises when torch is fired
Post by: BR549 on February 07, 2012, 11:14:49 AM: Check with TOM over at CandCNC. He is the gee wiz for that system.

(;-)TP
Title: Re: Plasma Z axis raises when torch is fired
Post by: rideright on February 09, 2012, 11:54:07 AM: Checked with CANDCNC they had me disable the stop on fault setting in the cut profile. It did not work. The torch will raise .5 when I press the torch on button where is this setting at I think it might be trying to do this while running the G code.

Sorry of the double post thought this one was on another forum
Title: Re: Plasma Z axis raises when torch is fired
Post by: stirling on February 09, 2012, 01:12:49 PM: There is no setting as such. It sounds to me like your THC is responding to the arc voltage at fire-up and moving the axis BEFORE you've actually pierced.

Question to self: why am I trouble shooting CandCNC's products when I'm about to release my own THC - which I'll support and not expect CandCNC to do it? >:D

Ian
Title: Re: Plasma Z axis raises when torch is fired
Post by: BR549 on February 09, 2012, 08:41:22 PM: MAy need to increase the thc delay to allow more time for the pierce before the thc kicks in. It sounds as thought the THC is reacting as soon as the arc strikes then as it pierces it moves down to compensate.

Just a thought, (;-)TP

Answer to IAN, Probably because you are NOT yet swamped with folks that WON't read the manuals????? Just a guess (;-)
Title: Re: Plasma Z axis raises when torch is fired
Post by: rideright on February 10, 2012, 12:46:31 AM: While working on this I found that my ARC OK light is on if I turn the torch on even if i have my plasma turned off. I am using the dry arc ok contacts but was using a current transformer before. Is there a way that this could be causing my problem? Eather way is there something I have to do to change the input from the CT to the contacts. I know it should not be on without the CT connected but it is.
Title: Re: Plasma Z axis raises when torch is fired
Post by: stirling on February 10, 2012, 04:23:20 AM: Quote from: BR549 on February 09, 2012, 08:41:22 PM
Answer to IAN, Probably because you are NOT yet swamped with folks that WON't read the manuals????? Just a guess (;-)
LOL - you know what Terry - I reckon you're probably right! ;D I guess I've got that coming.

Ian
Title: Re: Plasma Z axis raises when torch is fired
Post by: Hood on February 10, 2012, 05:15:24 AM: Quote from: stirling on February 09, 2012, 01:12:49 PM

Question to self: why am I trouble shooting CandCNC's products when I'm about to release my own THC - which I'll support and not expect CandCNC to do it? >:D

Ian

Or Mach forum ;)

Hood
Title: Re: Plasma Z axis raises when torch is fired
Post by: stirling on February 10, 2012, 05:39:39 AM: Wouldn't dream of it Hood - who would do such a thing? ;)

Ian
Title: Re: Plasma Z axis raises when torch is fired
Post by: Hood on February 10, 2012, 05:45:06 AM: ;D
Title: Re: Plasma Z axis raises when torch is fired
Post by: stirling on February 10, 2012, 05:55:36 AM: Just one problem....

If we (you ;D) are not going to sort out peoples BOBs, SSs (other external motion cards are available), drives, motors, VFDs, spindles, tool-changers, power supplies, probes, pendants, machines of all makes etc. etc.

This place is going to get a little quiet.

That's not to mention CADs, CAMs....

Ian
Title: Re: Plasma Z axis raises when torch is fired
Post by: Hood on February 10, 2012, 07:15:33 AM: Its ok, its just yours I wont help out on ;D

Mainly because I know SFA about THC ;D
Hood
Title: Re: Plasma Z axis raises when torch is fired
Post by: stirling on February 10, 2012, 07:35:48 AM: Mainly? Something you want to get off your chest there ma wee toorie bunnet wearing friend? ;D
Title: Re: Plasma Z axis raises when torch is fired
Post by: Hood on February 10, 2012, 07:38:30 AM: lol you programmer types read too much into words, wrong syntax used by me I suspect ;D
Hood
Title: Re: Plasma Z axis raises when torch is fired
Post by: stirling on February 10, 2012, 08:19:27 AM: ;D
Title: Re: Plasma Z axis raises when torch is fired
Post by: stirling on February 10, 2012, 08:27:03 AM: Quote from: rideright on February 10, 2012, 12:46:31 AM
While working on this I found that my ARC OK light is on if I turn the torch on even if i have my plasma turned off. I am using the dry arc ok contacts but was using a current transformer before. Is there a way that this could be causing my problem? Eather way is there something I have to do to change the input from the CT to the contacts. I know it should not be on without the CT connected but it is.
This is certainly wrong - the ArcOK (as you know) should not come on unless the arc is ... well ... OK which it clearly can't be if the plasma's off. This is something I think you need to run by your supplier.

Ian
Title: Re: Plasma Z axis raises when torch is fired
Post by: BR549 on February 10, 2012, 10:07:58 AM: AH YEP, that would do it. IF your ArcOK signal is ON all the time the instant you issue a M3 then the thc sees very low voltage and attempts to raise the head. As the arc actually starts the voltage goes UP and the THC corrects the head back down to the proper volt level.

Ian do you have units in the field yet??? Finalized the com system ???

YOUS GUYS show nuff talk funny . Must be something to do with being on the east side of the pond.

(;-) TP
Title: Re: Plasma Z axis raises when torch is fired
Post by: rideright on February 10, 2012, 11:27:15 AM: Thanks I will call CandCNC again hopefully they can help this time. >:(
Title: Re: Plasma Z axis raises when torch is fired
Post by: stirling on February 14, 2012, 01:22:07 PM: Quote from: BR549 on February 10, 2012, 10:07:58 AM
Ian do you have units in the field yet??? Finalized the com system ???
Hi Terry - sorry missed this post. Yes at long last they're "out there" - http://www.razordance.co.uk/THC.htm (http://www.razordance.co.uk/THC.htm)

Ian
Title: Re: Plasma Z axis raises when torch is fired
Post by: BR549 on February 14, 2012, 01:58:15 PM: NICE, were you able to work out a tip saver funtion. I see you use the Mach3 antidive.

Any plans for US distributor ??

Plans for a Decent hand pendant for plasma ?

(;-) TP