On 6 January 2016 at 02:05, Gene Heskett wrote:
> What do you think? Is that a safe and workable idea?
I have seen NC SSRs. I don't know how they do it, and they are expensive.
I have been using normally-closed mechanical relays to do this, with a
240V coil connected to
On Wednesday 06 January 2016 05:13:34 andy pugh wrote:
> On 6 January 2016 at 02:05, Gene Heskett wrote:
> > What do you think? Is that a safe and workable idea?
>
> I have seen NC SSRs. I don't know how they do it, and they are
> expensive.
>
> I have been using
On Wednesday 06 January 2016 02:36:57 Bertho Stultiens wrote:
> On 01/06/2016 03:05 AM, Gene Heskett wrote:
> [snip]
>
> > The idea being that when that drain goes low, it will charge the
> > .22, thru the diode, essentially maintaining that charge state. But
> > when LCNC is stopped, that drain
On 6 January 2016 at 14:01, Gene Heskett wrote:
>> Ideally it needs to be a force-guided relay, with the main power feed
>> (or surrogate thereof) through a second set of terminals
> That thought has crossed my mind too, but the power relays I have, with
> an aux set of
On Wednesday 06 January 2016 09:21:48 andy pugh wrote:
> On 6 January 2016 at 14:01, Gene Heskett wrote:
> >> Ideally it needs to be a force-guided relay, with the main power
> >> feed (or surrogate thereof) through a second set of terminals
> >
> > That thought has crossed my
On 6 January 2016 at 14:43, Gene Heskett wrote:
>> It is _not_ rated to switch 300V DC, so I just ensure it is never
>> asked to switch when there is 300V across it. Or, in fact, more than
>> 5V.
>
> Is it big enough to not weld closed forever?
It is rated at 6A, so has no
On 5 Jan 2016, at 23:10, Marcus Bowman wrote:
>
>
> On 5 Jan 2016, at 22:48, John Thornton wrote:
>
>> Just leave the limits out of the ini for the rotary.
>>
>> http://linuxcnc.org/docs/2.7/html/config/ini-config.html#_axis__lt_num_gt_section
>>
>> JT
>
> Thanks, John. I see the emails
On Wednesday 06 January 2016 10:33:58 andy pugh wrote:
> On 6 January 2016 at 14:43, Gene Heskett wrote:
> >> It is _not_ rated to switch 300V DC, so I just ensure it is never
> >> asked to switch when there is 300V across it. Or, in fact, more
> >> than 5V.
> >
> > Is it big
On 01/06/2016 10:13 PM, Gene Heskett wrote:
[snip]
>> This setup is probably also cheaper than using SSRs.
> Perhaps, but your parts count is many times what I have in mind.
But then again, the components are small and cheap. The setup you
described would probably use more space.
[snip]
> So if
On Wednesday 06 January 2016 17:05:27 Bertho Stultiens wrote:
> On 01/06/2016 10:13 PM, Gene Heskett wrote:
> [snip]
>
> >> This setup is probably also cheaper than using SSRs.
> >
> > Perhaps, but your parts count is many times what I have in mind.
>
> But then again, the components are small
On 01/06/2016 01:54 PM, Gene Heskett wrote:
>> When you turn off the machine and the SSR starts to bleed, and then
>> turn on the machine before the caps are completely empty, then you
>> will have the bleeder load on there permanently.
>
> Exactly the reason for the forced time delay in the turn
Not sure if anyone would be interested, but I noticed the Call For Makers
had a theme this year:
Our theme for 2016 is Building the Future. We are looking for hands-on,
interactive, and/or whiz bang exciting projects. Here are just *some* of
the topics that we’re looking for:
- Engineering,
On Wednesday 06 January 2016 15:10:55 Bertho Stultiens wrote:
> On 01/06/2016 01:54 PM, Gene Heskett wrote:
> >> When you turn off the machine and the SSR starts to bleed, and then
> >> turn on the machine before the caps are completely empty, then you
> >> will have the bleeder load on there
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