RE: [mach1mach2cnc] I find I have to move from Mach to EMC
- Hi Steve
I never completely finished the lathe with smooth stepper, the job we built
it for changed and then we nicked the PC for another machine so it sits
waiting for time to be spent on it.
But while it was running I never experienced any noise problems with it
after I used a separate 5V supply rather than the USB one. I have the PC in
the same cabinet, so any ground loop between PC and smooth stepper is short,
I then run standard opto isolated CPC11D parallel port breakout board, to
avoid any loops on that side. And drivers with relays off the second port to
control other functions so that is isolated. Steppers have in built opto
isolation and I used separate DC DC converter for the analogue to the VFD.
It all seemed to work noise free and threading worked though my stepper on
the cross slide was a bit weak to always pull out of the thread without
I know your an experienced builder and used to debugging most problems, but
from my smooth stepper experience noise never really raised it's head, so
something sounds odd with your setup. Did you try separate supply or use
PCUSB supply, and was the PC very close and on the same supply so at same
ground potential ?
Dr. Mark Vaughan Ph'D., B.Eng. M0VAU
Vaughan Industries Ltd., reg in UK no 2561068
Water Care Technology Ltd, reg in UK no 4129351
Addr Unit3, Sydney House, Blackwater, Truro, Cornwall, TR4 8HH UK.
Phone/Fax 44 (0) 1872 561288
RSGB DRM111 (Cornwall)
From: email@example.com [mailto:firstname.lastname@example.org]
On Behalf Of Steve Blackmore
Sent: 01 January 2011 06:33
Subject: Re: [mach1mach2cnc] I find I have to move from Mach to EMC
On Fri, 31 Dec 2010 08:28:59 -0800 (PST), you wrote:
>Thanks for the comments, Steve. Was always wondering what flaws did EMC
>compared to Mach3.
>By the way, you may already know it, but in case you don't, threading with
>Smooth Stepper works excellent!
You sure the pitch doesn't diminish ?
Like many others, I could never get a smoothstepper to work reliably due
to it's inbuilt ground loop and flaky USB reliability.
[Non-text portions of this message have been removed]