On Fri, 13 May 2016, Jim Craig wrote: > Date: Fri, 13 May 2016 09:42:15 -0500 > From: Jim Craig <[email protected]> > Reply-To: "Enhanced Machine Controller (EMC)" > <[email protected]> > To: emc-users <[email protected]> > Subject: [Emc-users] Thanks and a question > > First of all I want to thank everyone that provided advice on this > plasma cutter build I have been working on with my buddy. We finally > have it all up and running with the Gantry HAL component and the THC HAL > component. I want to especially thank John T. for the advice on the THC > and all of the support files and sample configs he has made on the > plasma side of things. I also want to thank pommen for the Gantry HAL > example on the forum. That was a lot of help also. > > I made several test cuts with he machine trying to get THC up and > running. I finally got it and we then made the first real project cut > with the machine Wednesday night. Here is apicture > <http://s44.photobucket.com/user/jimcraig5615/media/Plasma%20Parts/IMG_20160511_213537940.jpg.html> > of what we > cut out. It worked really well. > > Anyway my question is about THC. after cutting several different > thicknesses of metals it appears the tip voltage needs to be around 115V > for the 0.19" cut height as described in the plasma cutter manual. So > right now I have divided arc voltage set to 1/30 of actual arc voltage. > There is another setting in the plasma to set it to 1/16.67. I think we > should change to this divisor so that we get more resolution. I have > seen the voltage spike to around 150V at times but 1/16.67 would still > be less than 10V. > > I am resolution handicapped anyway because we are using software encoder > over the parallel port and I am using the resolution divider of 1/128 on > the THCAD-10 card so that we don't miss pulses. I initially tried it at > 1/32 and we were missing pulses like crazy so I went to 1/128 to be > safe. However I think the resolution is pretty low at the current time. > > Do you think the 1/16.6 would be safe for the THCAD-10 card.
Yes, the THCAD-10 has a continuous input overload voltage of 500VDC > > I think I will try to use the minmax HAL component to track the maximum > value out from the THCAD and determine if the 1/16.6 would cause the > signal to the THCAD-10 to ever exceed 10V. From what I read on the > documentation of the THCAD-10 I don't think that if it did exceed 10V it > would hurt it, but what do I know! > > Thanks again for the advice and help. > > Jim > > > ------------------------------------------------------------------------------ > Mobile security can be enabling, not merely restricting. Employees who > bring their own devices (BYOD) to work are irked by the imposition of MDM > restrictions. Mobile Device Manager Plus allows you to control only the > apps on BYO-devices by containerizing them, leaving personal data untouched! > https://ad.doubleclick.net/ddm/clk/304595813;131938128;j > _______________________________________________ > Emc-users mailing list > [email protected] > https://lists.sourceforge.net/lists/listinfo/emc-users > Peter Wallace Mesa Electronics (\__/) (='.'=) This is Bunny. Copy and paste bunny into your (")_(") signature to help him gain world domination. ------------------------------------------------------------------------------ Mobile security can be enabling, not merely restricting. Employees who bring their own devices (BYOD) to work are irked by the imposition of MDM restrictions. Mobile Device Manager Plus allows you to control only the apps on BYO-devices by containerizing them, leaving personal data untouched! https://ad.doubleclick.net/ddm/clk/304595813;131938128;j _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
