Topics

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General Mach Discussion / It's SLOW Going!!!!---can someone explain???

« on: May 06, 2011, 06:20:47 PM »

OK...I am new here......and usually work with Big Machines......but my question is related to the Hobby Machine I am playing with.....( TownLabs TL518)

I have a great CAD program for doing complex Surfaces....( Rhino )
I have a great CAM system for doing toolpath generation...( Madcam plugin for RHINO)
Simulation in MADCAM tells me I have a 50 min cycle time for Z level roughing.....( GREAT!)

Code output from Post processor is ok ( lots of X movements {with no other AXIS changes} written as a bunch of small steps....uuugh)

ACTUAL RUN TIME ( even using G00 command lines)........over 8 hrs.......

BOTTOM LINE.....THE THING IS JUST BARELY MOVING!!!!

What is creating this problem???

My Guess.....

the small steps do not allow the ACCEL/DECEL curve of the drives to be over written in the smoothing algorithm....hence even though my feedrate is set to 2000mm/min, actual traverse is more like 100mm/min...

How do I overcome this??

Play with motor tuning?

Any help appreciated!

Sam

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General Mach Discussion / New User - bought used machine- was running.....

« on: April 19, 2011, 07:54:50 PM »

I bought a used machine ( Townlabs TL518) using Mach3.....running under a build of R1.  Brought it home, loaded R3 but now it doesnt operate.

Issues....

I tested my LPT port, but it finishes ( i think) and the screen disappears, saying Mach1 test complete....so did I pass???
Jogging the machine......all axis are very jerky......

Ok....where do I start now to rectify this glitch?

Motherboard of the PC is an Asus P4B.....LPT is running ECP....

thanks in Advance......

Sam