Messages

3871

General Mach Discussion / Re: Power Supply Unit

« on: January 14, 2011, 05:37:42 PM »

Nic,
We already told you. The  voltage rating must exceed the output voltage by some amount. The uF can be more than calculated
but preferable not less.

You wouldn't put a circuit breaker or fuse which is less than required for the amps you will draw, it explodes, like wise you wouldn't put
a capacitor  not rated for the voltage you will use.

RICH

3872

General Mach Discussion / Re: Why is there no effort for the true closed loop control on the mach3 level

« on: January 14, 2011, 05:19:34 PM »

I will comment that this is an interesting discussion but you may never get an answer to the original question.

Art gave some thoughts some time ago relative to EMC and Mach and I will post a link if I can find it.  I think, as Jeff has pointed
out, that many users are miss-informed on their understanding of closed loop. Tell that to somebody that spent a lot of money and realy didn't get what they expected once informed.

RICH

3873

Video P*r*o*b*i*n*g / Re: Problem with index signal

« on: January 14, 2011, 04:19:42 PM »

Wave,
Please post your xml file.
RICH

3874

General Mach Discussion / Re: Win a CNC mill at Cabin Fever Expo, Janaury 14, 2011

« on: January 13, 2011, 09:47:14 PM »

Same here Ron.
I am wondering if you brought a boat  and plan on going home  with a bigger fire engine again?
RICH

3875

General Mach Discussion / Re: Win a CNC mill at Cabin Fever Expo, Janaury 14, 2011

« on: January 13, 2011, 09:08:11 PM »

So who's going to the Cabin Fever besides me and Russ.
Rumor has it that Russ will be giving away $1 bills at the door. 
Can't miss him as he impersonates  Hood sometimes but the give away is the hat with one horn.

RICH

3876

General Mach Discussion / Re: Power Supply Unit

« on: January 13, 2011, 08:39:42 PM »

Can I ask why a metal enclosure is suggested ?

Metal is not combustable and will contain a spark,fire, smoke,  and to some degree an explosion.

The metal enclosure acts as a shield thus preventing  transmitting and recieving spurious signals.

The metal enclosure allows for grounding. Should a wire break and touch the box , the box is grounded / it is bonded to the ground wire and such provides a less resistive path to ground. You could think of this as the same reason for having a ground wire run along with the other wires in a shield.

The box is basicaly a junction box and code may require you to put it in a metal enclosure.

Not to argue with your friends advice but I disagree with your friends advice. (Don't let him do any wiring in your house  )

RICH

 

3877

General Mach Discussion / Re: Power Supply Unit

« on: January 13, 2011, 06:45:41 PM »

control station box (1/4” plywood)

Strongly suggest a metal enclose.

RICH

3878

General Mach Discussion / Re: Help ! "Radial Cut with Zdepth" toolpath from mastercam makes Skip steps ??

« on: January 13, 2011, 05:53:43 PM »

How about putting a dwell every 6000 lines of code or maybe back to your reference. If you are doing a rough, finish and maybe waterline then one after each of those. Have the machine return to your 0,0,0 ref after each and to see what's happening.
May narrow it down some.
RICH

3879

General Mach Discussion / Re: Help ! "Radial Cut with Zdepth" toolpath from mastercam makes Skip steps ??

« on: January 13, 2011, 06:38:19 AM »

The problems "seem" similar from my recollection.....and don't remember some specific resolution of the problem.

RICH

3880

General Mach Discussion / Re: Cutting in the wrong place

« on: January 13, 2011, 06:21:10 AM »

Meil,
I noticed that there are no arc ( G2 & G3 ) moves in your code. If you had arcs the number of code lines would be greatly reduced
and the machining results would be smoother.
FWIW,
RICH