For plasma cutting is necessary secure a optional distance between the torch (cutting nozle) and cutted steel plate. The direction of this movement is around axis Z. The voltage, which is sourced from plasma source is voltage between cutted material and electrode (cathode) and he is variable according the distance between him.(torch and material). You can secure the optimal torch height by two ways (mechanically or electonically) In second case is necessary use a separate unit which control a height through torch voltage.
Meditatively idea: Take the voltege from plasma source, divide him into 0 - 10 V, convert into digital value, transfer this value into EMC,use the PID regulation inside EMC and relative to the reference voltage controll the Z axis movement. Milan -------------------------------------- Message: 2 Date: Sat, 05 Jan 2008 05:29:37 -0600 From: "John Thornton" <[EMAIL PROTECTED]> Subject: Re: [Emc-users] Plasma I/O To: [email protected] Message-ID: <[EMAIL PROTECTED]> Content-Type: text/plain; charset=US-ASCII On 4 Jan 2008 at 19:21, [EMAIL PROTECTED] wrote: Kirk, I don't know about the Miller but the Hypertherm is used a lot for cnc plasma cutters. The Hypertherm Powermax1250 has 3 I/O built in. Start Arc, Arc Stable and Arc Voltage. Start Arc is and input from your controller. Arc Stable is an output from the plasma torch. Arc Stable is a 0-300vdc signal. The Start Arc and Arc Stable are at the machine interface connection. The Arc Voltage is on the power board. The Hypertherm manual shows all the connections for hooking up to your controller. As far as the puma IMHO that is much more capability than aplasma cutter needs. The plasma cutter only needs a couple of inches of Z... Unless you did a puma style on its side now that would be something for plasma. John > I looked at the Miller plasma cutters to get a general idea of how > plasma cutters are configured. Some questions came to mind. Are > generic manual cutters normally used for DIY CNC rigs or are special > units needed? The literature for generic units only showed the front > panel, which only had an adjustment for gas pressure and a pressure > gauge. Is there typically any I/O on the rear panel? What I/O is > typically used with EMC? What kind of starting is needed? Would a puma > style joint system be appropriate? Just curious. > > -- > Kirk Wallace (California, USA No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.516 / Virus Database: 269.17.13/1209 - Release Date: 4.1.2008 12:05 ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/ _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
