the part that concerned me was the name of the DRO, magnetron.  wasnt sure if it used magnetics as opposed to the optical, so i dont know if it would be ttl or some analog signal or what.  and my oscilloscope was through a flood and i dont even know if it still works, i havnt even cleaned all of the mud and gunk out of it caus im afraid of how it'll look in there.  and without a scope to use, i dont really know how i should start tryin to figure it out.


On Dec 15, 2007 11:00 PM, Chris Morley <chrisinnanaimo@hotmail.com> wrote:

Though I am not sure about sony scales, if it produces TTL compatible, square edged pulses in quadrature  then yes. I remember seeing an ebay ad for scales that were compatible with sony's dro (and others) and they were TTL square edged pulses, so probably they would work. If the scales use current or voltage sin wave signals (such as some heidenhain , older acu-rite with d9 plugs and others) or some other scheme then a conversion 'blackbox' is needed. Then nice thing about the sin wave signals is that the conversion 'blackbox' can multiply the resolution by factors such as x1,x5,x10,x25 etc. I tried to find good info on sony scales a while back and had little success- I don't own any so I didn't try that hard...
________________________________
> Date: Sat, 15 Dec 2007 21:03:22 -0500
> From: drunkenwhippet@gmail.com
> Subject: Re: [Emc-users] DRO with VFD-acurite scales-index
>
> anyone happen to know anything about sony magnescale DROs?  would it be possible to interface the scales on my lathe to emc to work as a dro?  one of the axis on the sony are dead.
>
> On Dec 15, 2007 8:49 PM, Dave Engvall < dengvall@charter.net> wrote:
> This may get  you started:
>
> http://www.acu-rite.com/index.cfm?PageID=56ABA3A7-F620-11D4-
> BC6400A0CC271CB6
>
>  From there you can get the details on which scale you have.
> Good luck.
>
> Dave
> On Dec 15, 2007, at 5:16 PM, Chris Morley wrote:
>
>>
>> Some acu-rite scales have index pulses,some have the wire and no
>> pulse, some use an 'absolute' distance coded marks so when u move
>> maybe and inch or so it will know exactly where it is (after the
>> dro/controller evaluates with an algorithm)  . Heidenhain more
>> commonly has two indexes or the distances coded marks . Anilam
>> sometimes have index pulses. What model and plug style do u have?
>> ( round or D9). if u include the serial# of reader and scale I
>> might be able to look it up.
>>
>>
>> Chris Morley
>>
>>
>>
>> ----------------------------------------
>>> From: kwallace@wallacecompany.com
>>> To: emc-users@lists.sourceforge.net
>>> Date: Sat, 15 Dec 2007 11:02:18 -0800
>>> Subject: Re: [Emc-users] DRO with VFD
>>>
>>> On Sat, 2007-12-15 at 10:32 -0800, Kirk Wallace wrote:
>>>> On Fri, 2007-12-14 at 23:29 -0500, Stephen Wille Padnos wrote:
>>>>> Hi Kirk
>>>>>
>>>>> Your fast period is way too fast to do a PPMC read/write.
>>>>>
>>>>> The PPMC update is meant to run in the servo thread, which might
>>>>> be 1-2
>>>>> KHz.  The read function has to write several control bytes to the
>>>>> parport, then read 12 bytes for the 4 encoder registers, plus other
>>>>> data.  That will take you well beyond the 20 us base period in
>>>>> the HAL file.
>>>>>
>>>>> - Steve
>>>>
>>>> Steve - I put a gold star by your name. The Bridgeport VCP is usable
>>>> now. I posted the latest files:
>>>>
>>>> http://www.wallacecompany.com/machine_shop/bridgeport/pyvcp-dro2-
>>>> bp2.hal
>>>> http://www.wallacecompany.com/machine_shop/bridgeport/pyvcp-dro2-
>>>> bp2.hal
>>>>
>>>> I still have the  problem but spinbox is working. I found
>>>> that if I click the data entry box, from that point on, the up down
>>>> arrows ramp the numbers. It's pretty handy.
>>>>
>>>> The X axis encoder polarity happened to be wrong, so I changed the
>>>> ppmc.0.encoder.00.scale to a negative value, but that didn't fix
>>>> it. I
>>>> could switch the A and B wires, but I thought the encoder scale
>>>> should
>>>> have. I need to look into this a little more.
>>>
>>> Opps. I entered the encoder scale settings twice.
>>>
>>>> For anyone wanting to play with pyVCP, I found these pages helpful:
>>>>
>>>> http://www.linuxcnc.org/docs/html/hal_vcp.html
>>>> http://www.pythonware.com/library/tkinter/introduction/tkinter-
>>>> reference.htm
>>>> http://developer.mozilla.org/en/docs/XUL:hbox
>>>> http://developer.mozilla.org/en/docs/XUL_Tutorial:The_Box_Model
>>>>
>>>> I haven't been able to get a few things like the flex option to work
>>>> yet, so I am wondering if pyVCP has a full implementation of XUL or
>>>> Tkinter.
>>>
>>> From:
>>> http://www.linuxcnc.org/docs/html/hal_vcp.html#r1_5_3
>>>
>>> It says:
>>> "
>>> Inside a Hbox, you can use the ,  anchor=""/>, and tags to choose
>>> how items in the
>>> box behave when the window is resized. For details of how fill,
>>> anchor,
>>> and expand behave, refer to the Tk pack manual page, pack(3tk). By
>>> default, fill='y', anchor='center', expand='yes'.
>>> "
>>>
>>> It's amazing what ends up in the documentation.
>>>
>>>> It sure is fun to be able to customize the display, but I guess I
>>>> need
>>>> to get some real work done.
>>>>
>>>> (I have an "extra" wire on my Accurite linear scales, does anyone
>>>> know
>>>> if linear scales normally have an index?)
>>>
>>> --
>>> Kirk Wallace (California, USA
>>> http://www.wallacecompany.com/machine_shop/
>>> Hardinge HNC lathe,
>>> Bridgeport mill conversion, doing XY now,
>>> Zubal lathe conversion pending)
>>>
>>>
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