Sam,
That's what I figured my friend thanks for sharing that information.
It seems like if it worked for you and also for someone else's MAZAK
machine then changes are it will work for me... Besides I like the idea of
having the encoder on the spindle and not on the motor somehow it just
seems more precise to me that way. I have plenty of room inside that
massive head casting to make something like that and it sounds like it
should take care of my rigid tapping as well as my spindle alignment
concerns all at once. We are getting this puzzle sorted out one step at a
time....peace
Pete
On Monday, February 18, 2013, sam sokolik <[email protected]> wrote:
> 1:1 - must be an optical illusion... We did have one of the encoders go
> bad - the shaft to bearing seemed to be glued and just fell apart. We
> machined the housing of the encoder to add a bearing right at the timing
> pully. The spindle maxes out at 3000rpm. (old machine)
>
> sam
> On 2/18/2013 5:40 AM, Pete Matos wrote:
>> Sam,
>> Hey man thanks for the pictures and videos. That setup doesn't look
>> 1-1 is it just an optical illusion or am I missing something? It sure
>> looks well done this. What is the spindle Max RPM and does it take the
>> spindle speeds okay? Apparently it does or you'd have r and r'd it by
now
>> I am guessing. Perhaps this is my answer as well....peace
>>
>> Pete
>>
>>
>>
>> On Monday, February 18, 2013, sam sokolik <[email protected]> wrote:
>>> that is what we did -
>>>
>>> K&T spindle encoder with collet unclamp/clamp
>>>
>>> it works well.. It was about the only place we could fit the encoder
>>> without major hacking..
>>>
>>>
>>
http://electronicsam.com/images/KandT/conversion/spindle/spindletiminggear.JPG
>>> sam
>>>
>>>
>>> On 02/17/2013 10:25 PM, John Kasunich wrote:
>>>> On Sun, Feb 17, 2013, at 10:57 PM, Pete Matos wrote:
>>>>
>>>>> The third option I could go with would be to buy two timing pulleys of
>>>>> large diameter and machine one to fit over the approx 3" diameter
>> spindle
>>>>> body and another of the same diameter that would mount off to the side
>> of
>>>>> the spindle body and install an encoder wheel on it being a 1-1 belt
>> ratio
>>>>> that would allow me to track speed as well as use the index pulse on
the
>>>>> encoder to index for toolchange.
>>>> The 1:1 pulley idea is what was done on the Mazak at the EMC workshop.
>>>> Worked quite well. Since the belt is only driving an encoder, it
doesn't
>>>> need to be very big. 1/4" wide XL belt would be fine. Maybe even an
>> MXL.
>>>
>>>
>>
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