I will look. I have some schematics of the control also.
sam
----- Original Message -----
From: Jonathan Hancock
To: Enhanced Machine Controller (EMC)
Sent: Wednesday, September 03, 2008 5:04 PM
Subject: Re: [Emc-users] Puma560
Here are some more photos of the motor I am investigating:
http://www.flickr.com/photos/[EMAIL PROTECTED]/
Sam - it sounds like you have a manual :) Have you found any info on the
voltage the encoder (and pot) should be working at? I have used 5V to be safe...
Thanks
Jonathan
----- Original Message ----
From: sam sokolik <[EMAIL PROTECTED]>
To: Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net>
Sent: Wednesday, 3 September, 2008 10:26:33 PM
Subject: Re: [Emc-users] Puma560
the manual says there is a 116 to 1 gear reduction in each servo that
run the potentiometer. :)
sam
Jonathan Hancock wrote:
> Hi Jim.
>
> I forgot to mention there is an index o/p from the encoders also. The
> travel of the pots on the motors are geared to match the complete
> range of the joint so I can use the far ends of the resistance range
> for limits (or any point in between) and a centre point for homing.
>
> When I get a minute I'll post some more photos to help everyone get an
> idea of what I'm talking about...
>
>
>
> ----- Original Message ----
> From: Jim Coleman <[EMAIL PROTECTED]>
> To: Enhanced Machine Controller (EMC) <emc-users@lists.sourceforge.net>
> Sent: Wednesday, 3 September, 2008 10:05:29 PM
> Subject: Re: [Emc-users] Puma560
>
> possibility of replacing the encoders with one with index?
>
> would there be enough room on the us digital discs to drill a couple
> holes closer to the center for the purpose of limits?
>
> On Wed, Sep 3, 2008 at 3:44 PM, sam sokolik <[EMAIL PROTECTED]
> <mailto:[EMAIL PROTECTED]>> wrote:
>
> Well that sucks :) my plan is to make some inexpensive h-bridges
> and using one of the mesa cards we have to run it. 40v and a few
> amps should be easy. I am very surprised that it is sin/cos.
> Darn. I will keep tabs on this thread for sure .
>
> Thanks again.
> sam
>
> Jonathan Hancock wrote:
>> Hi all - just a quick update on my Puma project.
>>
>> As a thought, the output from the original encoders is a sin/cos
>> waveform (to see goto
>> http://www.flickr.com/photos/[EMAIL PROTECTED]/ ). I will try to
>> convert this low level signal into a ttl level square wave using
>> an op-amp. The encoder has a pair of leds and photo sensors in.
>>
>> I am looking at using a pic adc to gain limit and homing signals
>> from the pots on the back of the motors. This is looking quite
>> promissing.
>>
>> I've installed ubuntu and emc2 on my machine and now baffled!
>>
>> Jon - am I sorting the correct things out to interface to your cards?
>>
>> I'll keep you posted...
>>
>> Jonathan
>>
>>
>>
>>
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