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Re: ELS project/DROs #3D #DRO #RELS


 

Hi Ralph.
Playing catch up on e mails. Phew !!!!
I used a 3:1 ratio,the 6 mm dia? encoder spindle 10T and the driver off the spindle 30 T.
2.5 mm pitch and belts accordingly.
I believe Charlie procured through STP/SL?
There is a some work to be considered in modifying the original lathe to accept the 30 T encoder, it becomes
part of the preload spindle bearing spacers, but lets take it step by step, first procure the stepper motors, install, and we can move on
after that.
This first step should not impede any normal manual lathe operations during the conversions.
I bought my steppers from Steppers on line,??
Nema 23 for the Z axis, Nema 17 or 23 for the X axis.your call to suit your machine.
We can discuss procurement of drivers as we go along.? I am sure Richard will assist in selections.
I have stayed with the Nema 17 for the X axis, works OK and also I have space limitations ( back of the lathe to my building wall) for a Nema 23.
it gets close.My workshop measures 6 feet x 6 feet, that?s it, includes a lathe, mill, pedestal grinder and off hand grinder. cupboards etc.
Richard will tell you, it?s clorasephobic. LOL
But if? the X slide gibs are set and working as they should, (if not modify as we have recently discussed) a Nema 17 will be OK. Pleny man enough.

John
?


On Mon, 19 Aug 2019 at 16:04, Ralph Hulslander <rhulslander@...> wrote:
Charlie, how did you get the timing belt for the encoder on the spindle?

Ralph

On Mon, Aug 19, 2019 at 3:45 AM Richard <edelec@...> wrote:
Bear in mind that the 600 line encoder was used as I had one. Ensure you check how your top spindle speed relates to the lines, ratio and max encoder revs from its specification! Typically a 600 line encoder driven at 3:1 with top rpm of 5000 should not be used on a machine that will run at 2500 rpm.
Richard

On 17 August 2019 8:50:16 pm "CLevinski" <clevinski@...> wrote:

Hi, Ralph,

A 600 PPR quadrature rotary shaft encoder, coupled directly to the spindle with a timing belt with a 3:1 ratio.??


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Regards,

Charlie
New Jersey, USA


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Clausing 8520, Craftsman 12x36 Lathe, 4x12 mini lathe, 14" Delta drill press, 40 watt laser, Consew brushless DC motors and a non working 3D printer


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John

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