Re: [CAD_CAM_EDM_DRO] Help, continuing to burn drives

No , can't be the problem at least with mine as I start the computer
then Mach 3 after it is loaded I start the 5 volt logic power and then
last of all the main power supply .
I'm using the Axxus board in all my machines .

Ron

Robert Campbell wrote:

>Jeff,
>
>Keith should have our latest breakout board with the anti-chatter feature.
>This prevents pulses from going to the Gecko drives until Mach2 has control
>and the charge pump signal has reached the breakout board.
>
>Bob Campbell
>Bob@...
>www.campbelldesigns.com
>Breakout board
>THC board sets
>CNC router plans
>Stepper Motors
>VisualMill Basic
>----- Original Message -----
>From: "Jeff Goldberg" <jeff@...>
>To: <CAD_CAM_EDM_DRO@yahoogroups.com>
>Sent: Sunday, April 03, 2005 4:09 PM
>Subject: RE: [CAD_CAM_EDM_DRO] Help, continuing to burn drives
>
>
>
>
>>Ron,
>>
>>This is a cross post (from the mach1mach2cnc group) of what I sent in
>>answer
>>to Keith's question. The more I think of it, the more this seems to be
>>related to Windows sending code out the parallel port when starting up.
>>The
>>suggestion below about the start-up procedure I use with an additional
>>switch may cure this.
>>
>>
>>I'm kinda thinking on the fly on this one.
>>
>>In order to get the fuse to blow, your Gecko is drawing too many
>>amperes somehow. A "surge" on the line side is unlikely to force
>>this (unless you have somehow created a floating ground which
>>the "enable" relay is clearing). Assuming this, something is going
>>on with either the signal to the Gecko doing something vastly wrong
>>(don't know if it can, but say telling the drive to do the impossible
>>as a pulse from the CPU an boot up). Personally, I've noticed things
>>like this, so I have isolated the startup by using a pushbutton to
>>engage my enable relay after MACHx is started. I'm pretty sure
>>that's the problem. Only other thing I can think of is a bad spot in
>>your motor which is shorting out on startup, but that's unlikely if
>>it works otherwise.
>>
>>What I do is use a contact on the "enable" really to latch it with
>>the "Start" push button and use the E-Stop button to disengage it
>>(N.C. in series with the coil). After I push the button, I then hit
>>the "Start/Reset" button of MACH to tell the software it's OK to run.
>>
>>This way, (while it does create an additional operation of pushing
>>the "start" button), any boot up "artifacts" are ignored by
>>everything. I also end up with a situation that, while MACH can
>>initiate a software E-Stop, when I hit the E-Stop push button, the
>>Hardware has no choice but to stop regardless of the state of the
>>software.
>>
>>I just took a look and the circuit I'm talking about is posted as a
>>schematic under the files section of the mach1mach2cnc group, under
>>pendants
>>in my folder.
>>Download the JPG file (it's almost illegible when viewing with Yahoo)
>>and look at the upper right hand corner of the drawing. The
>>schematic is a little confusing because I am using multiple relays in
>>different parts of the setup for ENABLE, but the concept I explained
>>in my previous post should be able to be pulled from this.
>>
>>Let me know if you need more help,
>>Jeff
>>
>>
>>-----Original Message-----
>>From: Ron Kline [mailto:godsone@...]
>>Sent: Sunday, April 03, 2005 4:49 PM
>>To: CAD_CAM_EDM_DRO@yahoogroups.com
>>Subject: Re: [CAD_CAM_EDM_DRO] Help, continuing to burn drives
>>
>>
>>Mine just did the same thing Friday afternoon , for the second time in 6
>>months , the machine was running fine I shut it off for lunch and when I
>>turned it on after lunch the 4 amp fuse blew so I replaced it , blew again
>>I
>>disconnected the motor to see if it was shorted and it still blew the
>>fuse
>>
>>
>>
>
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Ron Kline

American Precision Ceramics



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