Messages

191

General Mach Discussion / Re: Computer shuts down

« on: October 20, 2012, 10:46:58 AM »

are you sure it's not the monitor.?

192

General Mach Discussion / Re: erratic uncontrolled cycle starts

« on: October 20, 2012, 07:18:24 AM »

Jim, you could drop the file onto a memory stick and copy it onto your work computer.

193

General Mach Discussion / Re: erratic uncontrolled cycle starts

« on: October 19, 2012, 05:56:07 AM »

good info there from Jim

All you should have on the computer running the machine is the operating system and mach3, anything more and you're asking for trouble.

194

General Mach Discussion / Re: BT30 spindle from scratch - with power drawbar and ATC of course

« on: October 06, 2012, 08:39:51 PM »

something i've just remembered, many years ago i was operating a 40 int mill and i checked to see if the lugs were actually doing anything. After the job the gap between the drive lugs and the toolholder was still there, so this job didn't cause the toolholder to use the drive lugs.

195

General Mach Discussion / Re: BT30 spindle from scratch - with power drawbar and ATC of course

« on: October 06, 2012, 08:25:12 PM »

just an example of the different levels of drawbar tension, an emco f1 (boxford 190) has a hand operated crank to release the toolholder which is relatively easy to use, but a denford triac uses a lot more drawbar tension to hold the same size bt30 toolholder, operated from an air cylinder.
The reason is the spindle power, the triac is about 2-3 times more powerfull than the emco f1.

196

General Mach Discussion / Re: BT30 spindle from scratch - with power drawbar and ATC of course

« on: October 06, 2012, 11:13:27 AM »

all the denford atc triacs after 1990 use either bt35 or bt30 toolholders without the drive dogs, so they rely solely on the taper for drive.

197

General Mach Discussion / Re: BT30 spindle from scratch - with power drawbar and ATC of course

« on: September 28, 2012, 07:18:23 AM »

the trouble with R8 in a manual/semi auto change, is you need soo much more room under the tool to make the change.
The 30 or 40 taper allows you to take the tool sideways a lot earlier than the R8.

198

General Mach Discussion / Re: Variable speed drive for mill spindle mach3 control

« on: September 28, 2012, 06:02:33 AM »

diycnc do a 0-10v isolated card for this.

http://www.diycnc.co.uk/html/spindle_boards.html

199

General Mach Discussion / Re: 2nd Parallel port with all pins at 5v ?

« on: September 23, 2012, 06:31:18 PM »

I had one not work in the pci bay next to the graphics card, so i always put it in the last port.

200

General Mach Discussion / Re: 2nd Parallel port with all pins at 5v ?

« on: September 23, 2012, 03:25:36 PM »

I find that when you set the 2nd port up it's always high on all pins until you reboot, not sure if that'll help in the future.