Messages

2491

G-Code, CAD, and CAM discussions / Re: Drilling in Mach3 and PMPost postprocessor

« on: August 10, 2006, 04:04:21 AM »

What do you class as a helical drill?.

What is the application?.

post a picture or a web link of the tool you are talking about.

Graham.

2492

General Mach Discussion / Re: strange holes

« on: August 09, 2006, 03:19:25 AM »

Looks very odd.

Post the G-code so we can have a look at the z moves.

Graham.

2493

General Mach Discussion / Re: Backlash

« on: August 06, 2006, 04:54:50 PM »

Hi Rusty,

thats a lot of backlash,  Mach3 will compensate for this but you may still have problems.

The main problem is cutter push and pull,  with that amount of lash the cutter can get hold of the work and drag it in to the cutter, scrapping the job and the cutter.

You may be better changing the chain and wheels for tooth belts and pulleys.

Graham.

2494

General Mach Discussion / Re: VFD recommendation

« on: August 06, 2006, 04:46:11 PM »

Hi Chad,

the application is a lathe, After reading up on all this I think I am going to go down the AC route, I have a homann digispeed on the machine now but the setup is not as good as it could be.  This is not the fault of the digispeed, its the crap motor and controller.  Its gutless at low speed so my threads go out of pitch when the motor starts to stall.  Also the thing will only run at about half speed in reverse.

When I use CSS with very light cuts (.025") on a 5" dia steel billet the motor struggles to accelerate.

This could all be down to me expecting too much from a 6" chuck lathe,  I am used to using lathes with 36Kw spindle motors. I don't stall them very often, but it has been known

Graham.

2495

General Mach Discussion / Re: VFD recommendation

« on: August 06, 2006, 06:03:37 AM »

You may be correct, I think they are just listing the two types under one heading, I just clicked the VFD link and thats the page it gave me.

The range is so vast that I don't know what I want or need to give me the best results.

All I want is to drive the unit from mach3 with as little extra gubbins as possible.

The motor I have is 180 VDC, 850 watt, 5000 rpm, 5.2 adc

Any ideas on what I need.

Graham.

2496

General Mach Discussion / Re: VFD recommendation

« on: August 06, 2006, 05:36:56 AM »

Is that attend more frequently or with more varied frequency 

Graham.

2497

General Mach Discussion / Re: VFD recommendation

« on: August 06, 2006, 05:27:49 AM »

Hi Hood,

not according to the drives warehouse web site, they list VFD's for both AC and DC motors.

driveswarehouse.com/index.php?prop_3=1&osCsid=957229ca83b9a9a30bc0d6706ec3cd49&cPath=149&filter=1

Graham.

2498

General Mach Discussion / VFD recommendation

« on: August 05, 2006, 07:09:11 PM »

Hi All,

I am looking for A VFD unit to drive a .75HP DC motor. Any recommendations for use with Mach3.

Graham.

2499

General Mach Discussion / Re: 3d on radius

« on: August 04, 2006, 02:39:54 AM »

Most CAM systems can do this, they call it 3D project or face wrapping, I use alphacam and it will do this no problem.

Graham.

2500

General Mach Discussion / Re: 4th axis runs too slow !!!!

« on: August 04, 2006, 02:36:59 AM »

Sound as if you have 1 of 2 options

let visual mill re-post the code with new feeds or drop the code into notepad and do a search and replace of the a feeds.

Graham.