Messages

331

Third party software and hardware support forums. / Re: solidworks

« on: January 09, 2012, 05:32:56 AM »

Thanks guys- sorry about the wrong post

fred

332

General Mach Discussion / users in johannesburg or Gauteng

« on: January 08, 2012, 01:46:49 PM »

I live in Johannesburg and would like to contact users of Mach3 near me

Fred

333

Third party software and hardware support forums. / solidworks

« on: January 08, 2012, 01:43:39 PM »

Can anyone suggest an online tutorial or tutor for solidworks?


fred

334

General Mach Discussion / Re: changing dro while running

« on: January 08, 2012, 12:10:52 PM »

Great discussion-- I am still to new to participate- and realize that.

There are a few additions that i will make to my setup as soon as i have a keen grasp
of the systems

Yes hood - your description of the need to change feed on the fly is exactly
what i would like to do.

You say the PP overrides.....   ( what is a PP ?0

335

General Mach Discussion / Re: Maximum feedrate on my setup?

« on: January 08, 2012, 11:59:35 AM »

Thanks Rich--


fred

336

General Mach Discussion / Re: What is a charge pump?

« on: January 08, 2012, 11:46:40 AM »

Thanks Guys --

Clear as mud--  ( Dont know how to put a smiley here)

How do I know if my machine has got one?

fred

337

General Mach Discussion / Re: Maximum feedrate on my setup?

« on: January 06, 2012, 12:53:22 PM »

thanks rich-
I am not near the machine now but i will try this on monday.

So what i had in mind fleshes out to this.

I read somewhere that the use of available energy should not be on the maximum
so that there is always some reserve for overloads etc.

so when i have done exercise that you suggest i will know the maximum.

the article suggested that i punt for about half of this as my "prefferred" speed range to be working in.

Using motor tuming i would then set this as the default 'TOP' speed ?
In your experience is my logic correct??

regards and thanks

338

General Mach Discussion / What is a charge pump?

« on: January 06, 2012, 11:49:17 AM »

I am reading every now and then about something called a charge pump??

what is a charge pump??

regards fred

339

General Mach Discussion / Re: Maximum feedrate on my setup?

« on: January 05, 2012, 01:03:23 PM »

Also rich thanks for the link to cleveland
regards fred

340

General Mach Discussion / Re: Maximum feedrate on my setup?

« on: January 05, 2012, 01:01:18 PM »

Hello chaps-- i guess i asked the wrong question.
I understand feedrate and machine power,depth of cut etc.

What i want to establish is the maximum speed that my steppers will be able to
achieve in turning the lead screw.

Graham you gave me a clue- so please let me bounce this off the forum
If I set the machine on a long traverse along the Y axis and measure the time
it takes to cover a known distance i will then know what the current feed speed
is.
Is it right that if i then use motor tuning to set the velocity to say 20% higher then time
the same distance again the timed speed should be quicker on the same distance

If i do this over and over again always increasing velocity in motor tuning - i will surely
get to a velocity which does not change the actual time any longer - this will then be
the "terminal " velocity that that stepper is able to achieve oin that load ?

Then when I am running a program i will usuallly but not always use the fastest feed that
is practical and adjust the finish required by changing the speed of the chuck or the depth of cut ??