I don't have any spares that are 100% functional. I blew the probe input
on one while doing EDM on that machine, and a loose ground on the frame
of the G0704 did the probe input on another.
If it's just one input you could just not use that input.
I've seen something similar, bring about $1000 to own it. Made for
bigger mills than my GO704 though.
Yikes. I didn't realize they are so expensive. I paid £1000 for the
whole machine. It's a Hurco Hawk like this one
<https://www.youtube.com/watch?v=oEUCFxHbBPA>.
What size impact wrench are you using?
Les
On 19/11/2018 13:04, Gene Heskett wrote:
On Monday 19 November 2018 07:31:09 Les Newell wrote:
Hi Gene,
I have taken to using an impact screwdriver tool on the
drawbar, and means to rack it up and down must be devised just to
engage it with the drawbar.
This drawbar has a 5/16 square tip, so its driven by an 8 point socket.
Rather than band it at the same time as the air cylinder pushes, I think
I'd like to run the spindle at 15 or 20 rpm which would engage the
socket with much less shockload. The wrench has enough power its
splitting that 8 point socket slowly so I've bought spares.
The next problem is in getting it to spin slow enough the pin can drop
into the spindle lock without breaking the pin or wallering out the
hole. Maybe I can do a spindle home, then drop the socket. I don't
imagine the plastic gears in the head could take that wrenches beating
for long. It can pull the bar tight enough I can't loosen it again with
the supplied wrench, so I don't let it hammer for any more than I can
get my finger off the trigger.
I have a commercially made drawbar that works like this. The impact
driver is simply pushed down by a pneumatic ram which is driven at the
same time the driver is energized. The motor starts spinning as it
drops, allowing the drive spline to line up with a spline the drawbar.
I've seen something similar, bring about $1000 to own it. Made for
bigger mills than my GO704 though.
A 5i25 simply doesn't have enough pins.
And the 7i76D has lots more output power than a 5i25. I think it can
drive the relays to run the wrench, or turn on the vacuum by way of
another ice cube without any extra buffering, just a diode across the
relay coil. Same relays can run the chain drive to change the tool.
Do you already have a 5i25? AFAIK you can have multiple cards so you
could simply add another.
I don't have any spares that are 100% functional. I blew the probe input
on one while doing EDM on that machine, and a loose ground on the frame
of the G0704 did the probe input on another.
Les
Thanks Les.
_______________________________________________
Emc-users mailing list
Emc-users@lists.sourceforge.net
https://lists.sourceforge.net/lists/listinfo/emc-users
