On Mon, 10 Sep 2007, Neil Buck wrote: > Date: Mon, 10 Sep 2007 22:28:37 +0000 (UTC) > From: Neil Buck <[EMAIL PROTECTED]> > Reply-To: "Enhanced Machine Controller (EMC)" > <[email protected]> > To: [email protected] > Subject: [Emc-users] Spindle Speed Control with MESA m5i20 > > I'm half way through retrofitting a Cincinnati VMC with a MESA m5i20 setup. I > would welcome some advice as to the best way to control the spindle. My goal > is > to be able to do rigid tapping and fully automatic tool changes. My thoughts > are > that since I am planning on adding a 4th rotary axis very soon I would like to > not use the remaining spare axis on the m5i20 card. So I was thinking about > using one of the digital outputs via a PWM HAL component. Then filtering the > output with a simple RC low pass filter to provide the analog 0-10V that the > spindle drive requires. The direction control is trivial using 2 relays driven > from a couple of digital outputs. I wonder would this setup provide a command > signal accurate enough for rigid tapping - or would it even matter given that > the spindle generates an index pulse. Incidentally the spindle also has an > output that indicates when the spindle is upto the requested speed, I was > wondering whether it's worth using it or whether it's overkill. > > My other line of thought was to use a second m5i20 card and control the > spindle > with one of the servo channels. Is this feasible? Overkill? A better option? > Has > anyone had an experience good or bad running 2 of the m5i20 cards together in > the same pc. Looking at the integration manual it looks very doable. Any real > world experience would be much appreciated. So far I've got coordinated motion > of the 3 axes and homing etc all sorted. Once the spindle is addressed it will > be time to move onto the biggest hurdle: Automatic tool change using the 21 > tool > carousel. I'm planning on harvesting lots of good info from the MAZAK > conversion. > > I welcome any comments and suggestions on the above. Also would like to say > how > impressed I've been with EMC and HAL so far. I've been running retrofit > production machines on Mach3 for the last couple of years but have seen the > light and am now in the process of converting them all over to EMC. Thankyou > to > all the developers who have obviously invested a huge amount of time and > effort > in making EMC so robust and configurable. > > Neil >
Dont know if the driver has been updated to work with it, but thre has been a 8 axis 5I20 HOSTMOT configuration around for some time. (If you dont need more than 1 connectors worth of I/O) Peter Wallace ------------------------------------------------------------------------- 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
