Messages

161

General Mach Discussion / Machine loosing position when estop

« on: September 12, 2008, 07:10:32 PM »

Since i installed the dev version of Mach and the SS I notice that anytime I hit the Estop button my machine loses its position on the axis thats moving. It only effects the axis thats moving when the estop is hit.  Is there a setting I have missed  somewhere/

162

General Mach Discussion / Re: Problems threading on the lathe

« on: September 12, 2008, 07:06:04 PM »

I can probably talk shepard out of his SS in the morning , The one I ordered has found a home in my mill.

163

General Mach Discussion / Re: Problems threading on the lathe

« on: September 12, 2008, 06:50:08 PM »

I am running the latest lock down version , 2.64 I think, the other two lathes are running 2.57 .

I upgraded to the latest developmental version and the problem still exist . I am getting nice accurate readings on the tach on screen , never waivers more than 1or 2 rpm .  Problem still exist , it doesnt look like its getting out of time , appears to be starting and ending at the correct time , just looks like the threads are torn some what , kind of like a dull tool that is dragging instead of cutting .  I am using a commercial boring bar type internal threading tool and carmex inserts , same tool I have used on the other machines to cut thousands of threads.


I am going to try a different threading tool in the morning , although I dont think its the problem , and if that doesnt make a diff I will make a disk and try the CNC4pc pulse generator

164

General Mach Discussion / Re: Problems threading on the lathe

« on: September 12, 2008, 10:38:57 AM »

no SS on this machine until the encoder can be attached .  The readout in mach is showing what appear to be accurate RPM readings across the entire range . I will make a slotted disk and attach the encoder I got from cnc4pc today and see if the threading is better

165

General Mach Discussion / Problems threading on the lathe

« on: September 11, 2008, 10:41:28 PM »

I hooked up the encoder on my big lathe to the breakout board today and am having some problems .  The encoder is a tamagawa qaud with index pulse , I have the index hooked to pin 12 input on my breakout board and I am getting a very accurate RPM reading on screen. The lathe is new with ball screws and no measurable backlash .  Threading tool is Carmex IP carbide threading tool , held very rigidly in VDI 30 tool holder.

I am using threading files that run perfectly on my other two lathes , both with ball screws and mach .  Everything seems to be working as it should but 4 out of 5 parts I thread at come out looking like I have rammed the tool holder into them . Everything will be running well and on the 5 -6 pass it I will get a shhh sound from the tool and the threads are pretty much wiped out . I have cut some where around 70 sets of thread today and might have 5 that are acceptable. I have cut thousands of threads on my other two lathes and just unsure whats going wrong here . 

I have tried adjusting the j value from .001 to .010 , changed the number of spring passes, tried two diff types of coolant , synthetic and oil based , trans fluid , trichlor , and gtx cutting fluid , still no luck , on at least two of  6-12 passes when cutting .05 pitch (20 tpi) threads the tool will just kind of wipe all the threads out .
Are there some params I need to look at or adjust  in the software that relate to the index pulse?

I think I have checked all the mechanical and wiring issues and have tried to eliminate the cutting tools, cutting fluids , feeds and speeds as possible problems .
Any help or thoughts greatly appreciated RT

166

General Mach Discussion / Re: How do add an mdi line to the automatic screen?

« on: September 10, 2008, 11:59:47 PM »

thanks it really was just that easy

167

General Mach Discussion / How do add an mdi line to the automatic screen?

« on: September 10, 2008, 10:40:44 PM »

I am using the lathe silver/blue screen set and would like an MDI line on the auto screen . The black bar across the bottom right side of the screen list the path for the file thats open , can I easily change it to an MDI line so I dont have to go thru the 2 or 3 button clicks to get back to the manual screen?

168

General Mach Discussion / Re: another tool change question , g32 g25 g28 ???

« on: September 10, 2008, 09:56:29 PM »

http://www.montysminiguns.com/brian.htm

169

General Mach Discussion / Re: another tool change question , g32 g25 g28 ???

« on: September 10, 2008, 08:46:22 PM »

I have some pics somewhere of one a fellow was building a couple of years ago in 22lr , delinker and all . I got to handle it at the knob creek machine gun shoot , very impressive.

170

General Mach Discussion / Re: another tool change question , g32 g25 g28 ???

« on: September 10, 2008, 08:02:42 PM »

Thats been one of my favorite things I have built , If you search my username panaceabeachbum on youtube you can see some of the other machine guns I have built


We couldnt quite get the macro working but did set the param in the g28 settings box and a quick g49 g28 callout right above the m6t** line seems to be working just fine .