Ralph,
Regarding my ELS purchases¡
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I bought the encoder pulleys from SDP in Hicksville, NY.? I do not recommend them.? They are quite expensive.? I ended up paying a total of $40 in shipping for items with virtually no weight because they were broken up into three shipments.? What you need is two timing belt pulleys, one 16 tooth and the other 48 tooth, as I recall, with a 2.5 pitch.? The 16 tooth should have double-flanges; the 48 tooth does not need them, as you will make your new spindle spacers wide enough to act as flanges.? Both of these pulleys will have to be bored out; the large one to be a precision fit on the spindle, the small one a precision fit on the encoder.? When boring, then need to be held by the peak surface of the teeth; the flanges are not necessarily concentric.? I can get you more info when you are ready.? The specific pulley part numbers I bought were A 6A32M016DF0603 and A 6A32M048NF0606.? I bought three different length timing belts, but ended up using the longest one, A 6T32MF106060.
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I bought the Arduino Mega 2560 Rev 3 board direct from the Arduino Store.? I could have bought it cheaper elsewhere, but wanted to make sure that I got the ¡°official¡± unit so it wouldn¡¯t be a problem.
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I bought the aluminum for the motor mounts locally; you will use your own source.
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I bought the stepper motors, which are bigger than they need to be, (especially for the cross-slide!) from Stepper Online, Model No. 23HS45-4204S.
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I bought a via Amazon.
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I bought three via Amazon.?
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I bought a Signswise 600p/r Incremental Rotary Encoder Dc5-24v Wide Voltage Power Supply 6mm Shaft encoder from Amazon. ?John uses an encoder with identical specs, but I am a little more hesitant.? The maximum frequency response seems a bit limited, (see discussion with Richard above) but John has had no trouble.
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I bought the two different sized couplers from Banggood; and .
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For some items, I bought multiple quantities so I have spares; encoder, belt, pulleys (in case I screwed up machining them!).
I hope this helps.
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Regards,
Charlie
New Jersey, USA
