Hi Azeddien,
The way differential signals work is that you
must put one input high and the other low to control the output. Putting
the + signal at +5V and the – signal at ground should cause the differential
output to be high. Putting the + signal at ground and the – signal at
+5V should cause the differential output to be low.
Putting both inputs at the same voltage
(ground) will not necessarily drive the output high or low.
There is a 470 Ohm terminating resistor between
the + and – inputs, so your encoder must be able to drive this load.
Most will.
Let us know what you find.
Regards,
TK
| Group: DynoMotion |
Message: 31 |
From: Azd Md |
Date: 8/26/2009 |
| Subject: Re: encoder channels on kanalog not working |
Thankyou Mr. TK very much for ur immediate response, however i have another question; what is the maximum number of axes i can have with Kflop+ kanalog boards. considering encoder as feedback. is it 4 axes or 8 axes. if 8 axes as staed in the Kflop specifcation, how to activate axes 5-7.
regards
--- On Wed, 8/26/09, TK <tk@...> wrote:
From: TK <tk@...>
Subject: RE: [DynoMotion] encoder channels on kanalog not working
To: DynoMotion@yahoogroups.com
Date: Wednesday, August 26, 2009, 1:00 PM
Hi Azeddien,
The way differential signals work is that you
must put one input high and the other low to control the output. Putting
the + signal at +5V and the – signal at ground should cause the differential
output to be high. Putting the + signal at ground and the – signal at
+5V should cause the differential output to be low.
Putting both inputs at the same voltage
(ground) will not necessarily drive the output high or low.
There is a 470 Ohm terminating resistor between
the + and – inputs, so your encoder must be able to drive this load.
Most will.
Let us know what you find.
Regards,
TK
From: DynoMotion@yahoogro ups.com [mailto: DynoMotion@yahoogro ups.com ] On Behalf Of Azd Md
Sent: Tuesday, August 25, 2009
8:39 PM
To: DynoMotion@yahoogro ups.com
Subject: [DynoMotion] encoder
channels on kanalog not working
|
Hi All
I am using Kflop+ kanalog with 4.12 frimware. However, the encoder channels
on channel 1 is not working. i checked the Digital I/O its in the input
state. B1 pin is always High A1 channel is blinking as i rotate the encoder.
i checked my encoder signal with the osciliscope several times it is working.
Before Channel 0 and 2 are working now no more.
i measured the output of the Y pins on the 26ls32 chip on the Kanalog. it is
fixed High. i grounded A+ and A-, still i am getting High output.
is there any clue.
Regrads
Azeddien
--- On Thu, 6/25/09, TKSOFT <tk@dynomotion. com>
wrote:
From: TKSOFT <tk@dynomotion. com>
Subject: [DynoMotion] Re: KFlop Takes so long to start
To: DynoMotion@yahoogro ups.com
Date: Thursday, June 25, 2009, 12:34 PM
Hi Azd,
How long do they Flash? With a USB connected and no application running they
should flash for ~ 3 seconds. With no USB cable connected they should flash
for ~1 second.
Does the board ever connect and work?
TK
--- In DynoMotion@yahoogro ups.com,
Azd Md
<azken98@... > wrote:
>
>
> Hi All,
> I am using Kflop withe the latest Firmware. the problem the cars green
leds flashes for so long time, and i have to switch on and off the power to
get it working.
> Is there any thing i can do to have it starts fast?
> Thank you all
> --- On Thu, 2/19/09, TK <tk@...> wrote:
>
> From: TK <tk@...>
> Subject: [DynoMotion] V4.11 Released
> To: DynoMotion@yahoogro ups.com
> Date: Thursday, February 19, 2009, 3:01 PM
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
>
> Download KMotion
> Version 4.11 - 2/18/09 (KMotion
> AND KFLOP) New*
>
> 6
> axes Coordinated Motion now supported
>
> New
> Selectable Screen Faces for KMotionCNC
>
> http://www.dynomoti
on.com/Help/ KMotionCNC/ KMotionCNC. htm
>
> Changes/Fixes from 4.10 - 4.11 - Details
>
> Note: after
> downloading a new version, Flash new firmware into KMotion using
the
> Config/Flash - New Version function.
>
>
>
|
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| Group: DynoMotion |
Message: 32 |
From: Tom Kerekes |
Date: 8/26/2009 |
| Subject: Re: encoder channels on kanalog not working |
Hi Azeddien,
KFlop currently only contains 4 single ended quadtrature encoder counters. Kanalog converts these to 8 differential inputs.
The 8 remaining differential inputs may only be used as general purpose inputs such as Z index.
So KFlop+Kanalog only supports 4 encoders as feedback.
Adding a SnapAmp will add 4 more differential quadrature encoder inputs or you might use the other 4 KFlop axis channels as Step/Dir drives.
We do have plans to add more encoder counters to KFlop (They need to be instanciated in the FPGA).
Do you need more than 4 now?
Regards
TK
| Group: DynoMotion |
Message: 33 |
From: Azd Md |
Date: 8/26/2009 |
| Subject: Re: encoder channels on kanalog not working |
Hi Tom,
I am working on robot project where six axes of encoder feedback is needed.
I will try with SanpAmp. however, if there is one board with six encoder channels, the that is will be better. any suggestion?
regards
Azeddien
--- On Wed, 8/26/09, Tom Kerekes <tk@...> wrote:
From: Tom Kerekes <tk@...>
Subject: Re: [DynoMotion] encoder channels on kanalog not working
To: DynoMotion@yahoogroups.com
Date: Wednesday, August 26, 2009, 11:46 PM
Hi Azeddien,
KFlop currently only contains 4 single ended quadtrature encoder counters. Kanalog converts these to 8 differential inputs.
The 8 remaining differential inputs may only be used as general purpose inputs such as Z index.
So KFlop+Kanalog only supports 4 encoders as feedback.
Adding a SnapAmp will add 4 more differential quadrature encoder inputs or you might use the other 4 KFlop axis channels as Step/Dir drives.
We do have plans to add more encoder counters to KFlop (They need to be instanciated in the FPGA).
Do you need more than 4 now?
Regards
TK
| Group: DynoMotion |
Message: 34 |
From: Tom Kerekes |
Date: 8/26/2009 |
| Subject: Re: encoder channels on kanalog not working |
Azeddien,
Let us see if we can add more encoder channel to KFlop.
It will probably take a week or two.
TK
| Group: DynoMotion |
Message: 35 |
From: Azd Md |
Date: 8/26/2009 |
| Subject: Re: encoder channels on kanalog not working |
It would be great. Send me the quotation for 1 Kflop and the new board as soon as it is available.
Thanks
Azeddien
--- On Thu, 8/27/09, Tom Kerekes <tk@...> wrote:
From: Tom Kerekes <tk@...>
Subject: Re: [DynoMotion] encoder channels on kanalog not working
To: DynoMotion@yahoogroups.com
Date: Thursday, August 27, 2009, 12:32 AM
Azeddien,
Let us see if we can add more encoder channel to KFlop.
It will probably take a week or two.
TK
| Group: DynoMotion |
Message: 36 |
From: Tom Kerekes |
Date: 8/26/2009 |
| Subject: Re: encoder channels on kanalog not working |
Azeddien,
You won't need to buy a new board. It is a firmware change.
I'll let you know. Thanks.
TK
| Group: DynoMotion |
Message: 37 |
From: Azd Md |
Date: 8/26/2009 |
| Subject: Re: encoder channels on kanalog not working |
Oh that is really great. we are going to buy another set anyway.
thanks
Azeddien --- On Thu, 8/27/09, Tom Kerekes <tk@...> wrote:
From: Tom Kerekes <tk@...>
Subject: Re: [DynoMotion] encoder channels on kanalog not working
To: DynoMotion@yahoogroups.com
Date: Thursday, August 27, 2009, 12:41 AM
Azeddien,
You won't need to buy a new board. It is a firmware change.
I'll let you know. Thanks.
TK
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