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That is useful. Thank you ?

Well, generally, the telescope folk don't use encoders they count steps and do it all with dead reckoning and some compensation factors for periodic error and the like. Of course they have the stars

I am a bit busy painting my office to analyse all of your comments, however a couple of points 1 My lathe cannot run much above 1400 rpm but even so I can still turn a 1mm diameter x 6mm long and put

Without a doubt the newer technology is nothing short of amazing. I based my ELS on the paper: Electronic Lead Screw Drive <mailto:Fritz.Linck@...> Fritz.Linck@... (Germany)

Long answer with some ELS theory. Using this web page as a reference, if you are cutting clock parts or tiny robotic stuff with diameters below 0.25", for example, the SFM for brass and aluminium goes

Sure, the niche is for custom boards with application specific functions. Having said that, plugging standard boards, like SSSmotor drivers into headers on your custom board reduces the labour burden

Thanks for clarifying that John. Richard

That number is what we decided on for the ELS about 10 years ago. For example my little Unimat DB-200 as well as the Sherlines easily turn 6000 RPM. So my ELS had that as a stipulation since it was to

The 600 pulse encoders are being run a 3 times spindle speed. This gives limitations on spindle speed. If the max encoder speed is 5000 rpm then spindle speed should be limited to 1600rpm. Not a

I am not really sure where this number of 6000 rpm for the lathe spindle came from? The RELS certainly has limits of operation and I am not sure what they are. As far as threading is concerned the

The files I have that I downloaded 19OCT2019 list 1800 lines. Not to say that someone hasn't modified the code to use a different encoder but the spreadsheet and the document file with photos show

John, I believe people running RELS are using 600 pulse encoders not 1800. Ralph wrote:

Yes but not without a bit of work. If you look at the Schematic of my ELS motor driver section you can see that not only is the ELS a lathe controller but also built in is a micro-stepper controller.

On Sat, 14 Dec 2019, John Dammeyer wrote: > It's not just the PC board of course. I was going through some folders looking for something when I stumbled on a copy of an email that had some links. > >

It's not just the PC board of course. I was going through some folders looking for something when I stumbled on a copy of an email that had some links.

I've made use of that now already. I had 5 of these boards made, 3 are assembled. They serve as an interface between inputs step/dir/enable and output Fault to either the STMBL which runs my A axis or

Not sure if I understood correctly but custom circuit boards can be sourced from Chinese suppliers in batches of 5 nowadays. Inexpensive and decent quality. You can specify the thickness of copper in

Found via Hackaday: a serious study of using brass threaded inserts in your 3D prints , a comparison of cheap vs expensive and the kinds of stress they’ll take.

One of the reasons I made the 3D printed encoder for the Gingery is so I could try the BeagleBone Black with the MachineKit LinuxCNC. I had in mind that it would be reasonably easy to interface to the

Oh and here's a 4 ine display mounted on an ELS with less keys for the generator charger controller project. The display was a sample. Way more expensive than all the ELS parts combined but good to