Dynomotion

Group: DynoMotion Message: 463 From: Bengt Sjoelund Date: 6/22/2010
Subject: Kanalog JP15
Hi Tom,
Slowly my work goes on my CombiMill. Time to get some more things connected and question arises as where to connect home and limits.
As the original setup is 24VDC for all switches it would be nice to just use some parts that are already there. As for now I have 3-axis but will sooner or later have A-axis also I would like to be 'ready'.

How to make best use of JP15 as it can handle 24V?

Opto_In0_Plus = share this input for all HOME ( 24V+ to switch to In0 )
Opto_In0_Neg = to GND

Ref Axis can then only be made one axis at a time.

Is there any clever way to make use of Index from the encoder and mix this with the mechanical Home switch?

What about + and - axis limits, I know they can be shared but is there any bad issues doing so? Most likely I will use softlimits in Mach to be on the safe side.

If so In_0 and In_1 will handle all axis home/limits and there is 6 more inputs to go.

So my friend, is there any pitfalls in my way of thinking?

Cheers
Bengt
Group: DynoMotion Message: 464 From: Tom Kerekes Date: 6/22/2010
Subject: Re: Kanalog JP15
Hi Bengt,

I agree with all your statements.

Parallel Home and limits are ok.  You might consider having one input for all the + limits and one for all the - limits.

Regarding Home + Index: yes you may do this.  You must write a small homing program to home each axis.  So it is very flexible.  Basically move until you see home, then slow down and move until you see the index.

Regards
TK

Group: DynoMotion Message: 465 From: Bengt Sjoelund Date: 6/22/2010
Subject: Re: Kanalog JP15
Thanks for your reply Rom,
Can you say why to use + and - on separate inputs?
Cheers Bengt

--- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote:
>
> Hi Bengt,
>
> I agree with all your statements.
>
> Parallel Home and limits are ok. You might consider having one input for all the + limits and one for all the - limits.
>
> Regarding Home + Index: yes you may do this. You must write a small homing program to home each axis. So it is very flexible. Basically move until you see home, then slow down and move until you see the index.
>
> Regards
> TK
>
>
>
>
> ________________________________
> From: Bengt Sjoelund <cnc@...>
> To: DynoMotion@yahoogroups.com
> Sent: Tue, June 22, 2010 10:57:48 AM
> Subject: [DynoMotion] Kanalog JP15
>
>
> Hi Tom,
> Slowly my work goes on my CombiMill. Time to get some more things connected and question arises as where to connect home and limits.
> As the original setup is 24VDC for all switches it would be nice to just use some parts that are already there. As for now I have 3-axis but will sooner or later have A-axis also I would like to be 'ready'.
>
> How to make best use of JP15 as it can handle 24V?
>
> Opto_In0_Plus = share this input for all HOME ( 24V+ to switch to In0 )
> Opto_In0_Neg = to GND
>
> Ref Axis can then only be made one axis at a time.
>
> Is there any clever way to make use of Index from the encoder and mix this with the mechanical Home switch?
>
> What about + and - axis limits, I know they can be shared but is there any bad issues doing so? Most likely I will use softlimits in Mach to be on the safe side.
>
> If so In_0 and In_1 will handle all axis home/limits and there is 6 more inputs to go.
>
> So my friend, is there any pitfalls in my way of thinking?
>
> Cheers
> Bengt
>
Group: DynoMotion Message: 467 From: Tom Kerekes Date: 6/22/2010
Subject: Re: Kanalog JP15
KFlop has an option to disable if a limit is set and motion in the direction of the limit is attempted.  So if you are in the limit, then you are still able to re-enable and move out of the limit without geting another fault.  I suppose there is a flaw with sharing limits where we could have one axis hit the + limit and another axis hit the - limit and then none of the axis could move in any direction.  But I think this is unlikely.

TK


Group: DynoMotion Message: 468 From: Bengt Sjoelund Date: 6/22/2010
Subject: Re: Kanalog JP15
OK, I see your point Tom (sorry for spelling wrong in my reply)
Even if it very unlikely to happend but when MrMurphy is on board anything can go wrong so I will go for this and use 3 inputs for homeing and +/- limits. What inputs on on JP1 or 2 should I use for the Index? http://forumbilder.se/show.aspx?iid=7e2201091602Pd081
If you look at the picture I think I have connected A4+ / A5+ / A6+
for the Index pulses, is this OK or should I use some other inputs?
Cheers Bengt

--- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote:
>
> KFlop has an option to disable if a limit is set and motion in the direction of the limit is attempted. So if you are in the limit, then you are still able to re-enable and move out of the limit without geting another fault. I suppose there is a flaw with sharing limits where we could have one axis hit the + limit and another axis hit the - limit and then none of the axis could move in any direction. But I think this is unlikely.
>
> TK
>
>
>
>
>
> ________________________________
> From: Bengt Sjoelund <cnc@...>
> To: DynoMotion@yahoogroups.com
> Sent: Tue, June 22, 2010 3:28:39 PM
> Subject: [DynoMotion] Re: Kanalog JP15
>
>
> Thanks for your reply Rom,
> Can you say why to use + and - on separate inputs?
> Cheers Bengt
>
> --- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@> wrote:
> >
> > Hi Bengt,
> >
> > I agree with all your statements.
> >
> > Parallel Home and limits are ok. You might consider having one input for all the + limits and one for all the - limits.
> >
> > Regarding Home + Index: yes you may do this. You must write a small homing program to home each axis. So it is very flexible. Basically move until you see home, then slow down and move until you see the index.
> >
> > Regards
> > TK
> >
> >
> >
> >
> > ________________________________
> > From: Bengt Sjoelund <cnc@>
> > To: DynoMotion@yahoogroups.com
> > Sent: Tue, June 22, 2010 10:57:48 AM
> > Subject: [DynoMotion] Kanalog JP15
> >
> >
> > Hi Tom,
> > Slowly my work goes on my CombiMill. Time to get some more things connected and question arises as where to connect home and limits.
> > As the original setup is 24VDC for all switches it would be nice to just use some parts that are already there. As for now I have 3-axis but will sooner or later have A-axis also I would like to be 'ready'.
> >
> > How to make best use of JP15 as it can handle 24V?
> >
> > Opto_In0_Plus = share this input for all HOME ( 24V+ to switch to In0 )
> > Opto_In0_Neg = to GND
> >
> > Ref Axis can then only be made one axis at a time.
> >
> > Is there any clever way to make use of Index from the encoder and mix this with the mechanical Home switch?
> >
> > What about + and - axis limits, I know they can be shared but is there any bad issues doing so? Most likely I will use softlimits in Mach to be on the safe side.
> >
> > If so In_0 and In_1 will handle all axis home/limits and there is 6 more inputs to go.
> >
> > So my friend, is there any pitfalls in my way of thinking?
> >
> > Cheers
> > Bengt
> >
>
Group: DynoMotion Message: 469 From: Tom Kerekes Date: 6/22/2010
Subject: Re: Kanalog JP15
Hi Bengt,

Don't you have differential encoders?  The index signal should be two wires marked something like Z+ Z-.  You would connect these to A4+ and A4-.

It is also ok to use B4+ or B4- if you wish.

Cheers
TK

Group: DynoMotion Message: 470 From: Bengt Sjoelund Date: 6/22/2010
Subject: Re: Kanalog JP15
Yes they are, sorry but I was in the believe that only one was needed for index. I will have to rewire from connector to Kanalog or maybe just one more wire to each A4- A5- A6-.
Thanks again for looking into this Tom, appreciated.
Cheers Bengt

--- In DynoMotion@yahoogroups.com, Tom Kerekes <tk@...> wrote:
>
> Hi Bengt,
>
> Don't you have differential encoders? The index signal should be two wires marked something like Z+ Z-. You would connect these to A4+ and A4-.
>
> It is also ok to use B4+ or B4- if you wish.
>
> Cheers
> TK