In converting my Mazak I just tied a toggle switch to the control line
for the valve that ran the hydraulics for tool release. One hand on the
switch and one on the tool. Rather crude but it worked until the
belleville stack broke.
Dave
On 11/14/21 4:02 AM, Roland Jollivet wrote:
On a BT30
m: Matthew Herd
Sent: Sunday, November 14, 2021 8:21 AM
To: Enhanced Machine Controller (EMC)
Subject: Re: [Emc-users] Power Draw Bar
[EXTERNAL EMAIL] Be sure links are safe.
I believe (but could be wrong) that Haas machines use a single momentary switch
on the head to release the drawbar.
Ma
an R8. Its also tight enough I have to
use a hammer on the regular end wrench to loosen it.
> > -Original Message-
> > From: andrew beck [mailto:andrewbeck0...@gmail.com]
> > Sent: November-14-21 7:04 PM
> > To: Enhanced Machine Controller (EMC)
> > Subject:
andrew beck [mailto:andrewbeck0...@gmail.com]
> Sent: November-14-21 7:04 PM
> To: Enhanced Machine Controller (EMC)
> Subject: Re: [Emc-users] Power Draw Bar
>
> There are two common types of draw bars.
>
> The ones that use a pullstud. Eg haas. Just have a tool eject
> > From: John Dammeyer
> > Sent: November 14, 2021 12:59 AM
> > To: Enhanced Machine Controller (EMC)
> > Subject: [Emc-users] Power Draw Bar
> >
> > Quick question.
> >
> > On commercial machines that have buttons to load or unload the tool by
&
t frees both hands to remove/insert the tool.
>
> -Original Message-
> From: John Dammeyer
> Sent: November 14, 2021 12:59 AM
> To: Enhanced Machine Controller (EMC)
> Subject: [Emc-users] Power Draw Bar
>
> Quick question.
>
> On commercial machines th
I'm unsure of commercial machines but I use only a foot switch on my
Tormach. That frees both hands to remove/insert the tool.
-Original Message-
From: John Dammeyer
Sent: November 14, 2021 12:59 AM
To: Enhanced Machine Controller (EMC)
Subject: [Emc-users] Power Draw Bar
Quick
On a BT30 spindle;
A button the front of the sindle, drawbar is depressed only as long as you
hold the button in.
On Sun, 14 Nov 2021 at 08:03, John Dammeyer wrote:
> Quick question.
>
> On commercial machines that have buttons to load or unload the tool by
> actuating the drawbar how are the
On my Prototrak mill there are two 16mm dia. momentary switches vertically
mounted.
Load - white - above
Unload - black - below
> On 14 Nov 2021, at 06:00, John Dammeyer wrote:
>
> Quick question.
>
> On commercial machines that have buttons to load or unload the tool by
> actuating the
Quick question.
On commercial machines that have buttons to load or unload the tool by
actuating the drawbar how are the buttons arranged?
Are there two? One for Load and one for Unload? Are they arranged vertically
or horizontally?
If vertically does the upper one load or unload? If
On Tuesday 20 July 2021 12:37:52 Les Newell wrote:
> My Hurco uses an air impact to run the draw bar. It has a small
> pneumatic ram to push the driver down to engage the drawbar.
>
> Les
>
> On 19/07/2021 22:07, John Dammeyer wrote:
> > Here's the basic rendering. Now I can redesign it to
My Hurco uses an air impact to run the draw bar. It has a small
pneumatic ram to push the driver down to engage the drawbar.
Les
On 19/07/2021 22:07, John Dammeyer wrote:
Here's the basic rendering. Now I can redesign it to better fit the mill.
It's possible I could add a flip down latch
achine Controller (EMC)
> Subject: Re: [Emc-users] Power Draw Bar
>
> On Mon, 19 Jul 2021 at 01:41, John Dammeyer wrote:
>
> > The disk spring setup would be great if the only thing I used was TT
> > Tooling. But if I remove the R8 3/4" flat top collet and insert
&g
On Mon, 19 Jul 2021 at 01:41, John Dammeyer wrote:
> The disk spring setup would be great if the only thing I used was TT Tooling.
> But if I remove the R8 3/4" flat top collet and insert my 3/4" R8 drill
> chuck the springs seem like they'd be an issue.
You might be able to convert the
It would be simpler to use belleville washers and an air cylinder to apply
pressure to release the tooling.
https://hackaday.com/2020/01/11/stacks-of-spring-washers-power-the-drawbar-on-this-cnc-mill-conversion/
On Sunday, July 18, 2021, 5:39:23 PM MDT, John Dammeyer
wrote:
A long
Hi Andy,
> From: Andy Pugh [mailto:bodge...@gmail.com]
The disk spring setup would be great if the only thing I used was TT Tooling.
But if I remove the R8 3/4" flat top collet and insert my 3/4" R8 drill chuck
the springs seem like they'd be an issue. The air cylinder to push on the
spring
> On 19 Jul 2021, at 00:39, John Dammeyer wrote:
>
> case though is there a way to limit the distance the butterfly turns?
Have you considered a disc spring setup instead? The one on my mill has worked
well.
Otherwise: maybe you could have a plain section above the thread for the nut to
A long long time ago I read an article in Home Shop Machinist written by Rick
Sparber on what he called a WUT.
https://rick.sparber.org/Articles/drawbar/Drawbar.htm
Although I couldn't make mine exactly as his I was able to at least create a
thick hex washer so that I could tighten the draw bar
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