Messages

61

General Mach Discussion / Re: Newbie here... Have a huge issue wih MACH 3 AND I REALLY NEED HELP!!!

« on: March 25, 2009, 01:48:23 PM »

Might be the loosing steps thing.
Post your gcode
Fernando

62

General Mach Discussion / Re: Newbie here... Have a huge issue wih MACH 3 AND I REALLY NEED HELP!!!

« on: March 25, 2009, 01:35:24 PM »

might be a stupid question, but i might as well ask it. Are you compensating for tool diameter?

Post your gcode so we can check it.
Fernando

63

General Mach Discussion / Re: Can input led's stay on after e-stop

« on: March 25, 2009, 12:49:31 PM »

Yea, if you just have the brain light up a LED when the limit LED is on, then, you have the same problem, you need a way to latch it.

If it is possible to have the brain write to a DRO depending on the status of the LED, then it would behave the same way, it would change to 1 when on, and 0 when off.

What you can do is have the Brain look at the Limit LED, have that LED activate a timer that will start right away, and set the pulse duration to something big, like 120, and have that timer turn on a usedLED, one for each limit.

That way when the limit is triggered, the timer starts counting down for 120 seconds, and while the timer is active, the UserLED will keep lit.
Then you have to make sure you can get to the diagnostics page in less than 120 seconds to see which one was triggered.

Fernando

64

General Mach Discussion / Re: Can input led's stay on after e-stop

« on: March 25, 2009, 12:26:19 PM »

Hood, they are faster but from what i remember the latching in brains is not so good, dont know if you can output to a ticker in brains though.
Fernando

65

General Mach Discussion / Re: Newbie here... Have a huge issue wih MACH 3 AND I REALLY NEED HELP!!!

« on: March 25, 2009, 12:25:55 PM »

You can try what hood suggested, since that is what you should really aim for, to limit accel and velocity rates in tuning so that your motors never miss steps.

But yes, that is what i suggested lower feedrates and depths of cut. Stepper motors lose their torque when increasing their speed. so if you are making a faster cut, you would have less available force to make that cut, and if on top of that the depth of cut is bigger, you need even more force for that.

Fernando

66

General Mach Discussion / Re: Can input led's stay on after e-stop

« on: March 25, 2009, 12:00:06 PM »

Nope, they are not going to stay lit if by the time you checked they have been un-triggered.

I guess you could  write a macropump that would monitor the limit switches' LEDs and have it turn on another led which should stay on on estop. THen just have a button to turn it off once you figured out which one was it.

You might even have the macropump look at the leds, and post something to a ticker like "X limit switch triggered"

but if the triggering of the limit switch on off is faster than the macropump run speed, this might not work.

Fernando

67

General Mach Discussion / Re: Newbie here... Have a huge issue wih MACH 3 AND I REALLY NEED HELP!!!

« on: March 25, 2009, 11:51:19 AM »

Hello,
By missing steps they mean that your step motors cant keep up with the load, and they loose steps.

Were your cuts in acrylic more aggressive than in wood? (higher feed, bigger depth of cut?)

Fernando

68

Show"N"Tell ( What you have made with your CNC machine.) / Re: 3d Machining

« on: March 25, 2009, 01:18:09 AM »

Thats some neat work... great finish! what did you have to do to it besides a little elbow grease?

Keep up the good work!
Fernando

69

Tangent Corner / 1982 Mazak quickturn

« on: March 24, 2009, 07:10:25 PM »

Hello guys,
Well i just found a guy that is selling a mazak quickturn universal cnc slant lathe its from 1982.
swing 9" between centers 20" pneumatic chuck, hydraulic tailstock, 8 position turret toolchanger, 10HP spindle

The guy say it has a busted card, and that it is the only thing its missing.

Asking price... 2,500 dlls.

It has DC servos, although i couldnt get to read the plate for data.

Im thinking it would be a great retrofit, very complete from toolchanging, the automatic chuck and tailstock etc... not for beginners, but i think it wouldnt be impossible to do.

Im attaching pictures,

What you guys think? is it a good price, its hard to know for me, mainly because you dont see too many of this type machine in Mexico for sale.

Thanks
Fernando

70

General Mach Discussion / Re: Bridgeport CNC upgrade

« on: March 13, 2009, 11:52:49 AM »

PM stands for personal message.

His actual username is Hillbilly9749

Here is a direct link to sending one to him

http://www.machsupport.com/forum/index.php?action=profile;u=19420

On the bottom part it says "Send this member a personal message." click there.

you can get to that page by clicking on his username on a post he has made.

Regards
Fernando