The original RELS software was based upon using an 1800 line encoder
disk taken from an HP printer, therefore No Cost!
That option is still available to you if you can get hold of a disk,
read head, mount and drive it in some way and add some electronics.
If you do not want to go that way then as you say purchase an encoder.
You do not need an "Index" output just an A and B signal. The original
software was written around 1800 line per spindle revolution however it
is possible to use a different number of lines but pick something
somewhere close to this sort of value.
I would assume that you will be belt driving the encoder so there is
really no need to stay at 1:1.
The final specification for the encoder therefore resolves to :-
5v supply, A and B signals, index not required, around 1800 lines per
rev after belt ratio, capable of the maximum spindle speed after belt ratio.
Do not get sidetracked by Quadrature counts if quoted, you are only
interested in the number of lines.
On my system I have a 600 line encoder running at 3:1 and it cost me
maybe ?15 from China.
If you need any further information just yell
Richard Edwards
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On 09/12/2019 15:55, Ralph Hulslander wrote:
I am just about done with my Must Do's and will be headed to my shop
for the next two or three months.
I want to do ELS (#RELS) on my Craftsman?101.07403 12x36 Lathe. I also
have a Mini Lathe 4x12 which
I will do later.
I would like to document the full story possible for publication or at
least a detailed web post.
Thought I'd start with the encoder.
Where do I start? What encoder do I want? I googled rotary encoders
and my head is spinning.
Especially the price I can pay $16.00 - $30.00 or $300-$600.00, even
with the same brand name
there can be $200.00+ difference from different suppliers.
I will be mounting the encoder on the spindle at a 1:1 drive so a 2 -
3000 rpm encoder should work.
I appreciate the help and would really like to document this selection.
Ralph
--
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
