Karl Most good THC equipment give you three signals of importance. 1: The Arc good signal - tells you that the system has pierced and is ready to move 2: Torch up - tells you the torch is too low 3: Torch down - tells yo the torch is to high
Simple bit of logic will sort out the THC loop I think. On 2012/11/13 12:34 AM, Karl Schmidt wrote: > Controlling arc distance has been used as an example of one of the > hardest things to put in a control loop. The interaction is non linear > and chaotic. For cutting most sheet material, I would set it up to > start at some sane distance and have a long, filtering time constant > in the loop with some dead-band hysterisis - might want to throw away > out of range samples. > > Trying to do a lot of fancy math to linearize the loop will lead to > frustration. > > > -------------------------------------------------------------------------------- > > > Karl Schmidt EMail k...@xtronics.com > Transtronics, Inc. WEB > http://secure.transtronics.com > 3209 West 9th Street Ph (785) 841-3089 > Lawrence, KS 66049 FAX (785) 841-0434 > > True wisdom is knowing what we don't know; > There are many things that we can be certain of if we are willing to > think, but > true maturity is being comfortable with the idea that there are > unknowable things. -KPS > > > -------------------------------------------------------------------------------- > > > > -- Regards / Groete Marius D. Liebenberg MasterCut cc Cel: +27 82 698 3251 Tel: +27 12 743 6064 Fax: +27 86 551 8029 Skype: marius_d.liebenberg Skype Me^(TM)! <skype:marius_d.liebenberg?call> Get Skype <http://www.skype.com/go/download> and call me for free. --- avast! Antivirus: Outbound message clean. Virus Database (VPS): 121112-1, 2012/11/12 Tested on: 2012/11/13 07:27:23 AM avast! - copyright (c) 1988-2012 AVAST Software. http://www.avast.com ------------------------------------------------------------------------------ Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
