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So, using Rollie's Dad's Method, a pdf I found here Starting out, I'm using a aluminium roller from a scrapped photocopier (CNC parts, and springs!.. lots of springs) the roller is made to high tolerances and smoothness. My 3 jaw chuck however, is China's 'finest' (came with the lathe)...

VFD does not give optimum torque at all speeds.. best of both worlds, I have my favourite gear speeds to use

Any metal filings coming from gears meshing etc will eventually find its way to the magnet and stay there, avoiding the bearings Same as finding detergent free gear oil - the detergent traps foreign objects and gunk in the oil (normally to head for the filter) detergent free oil lets it...

So, I didn't take a while heap of photos during the rebuild, but I'll show you what I got... or found... Tearing it down... Shortly after buying it, i opened the gear case to check if I was the proud owner of Chinese foundry sand mixed with oil... nothing major found, it was reasonably...

Hi all, I have finished rebuilding my AL320 lathe and found many 'chinese' issues along the way, so I thought I would provide some info about it. Seeing as this forum is the only place I found any worthwhile AL320 information and other people who own one. First, the end result... before it...

Thanks rodw :cool: I have found my method to handle rotation twist very well, as it is only pivoting between one bolt per jaw, and to be honest I only notice it when the quill retracts just beyond flush as the jaws close and there is still 0.1/0.2mm more to retract, you see the whole caliper...

Old Post but thought I should add my AL320 mods... My version of a Digital Caliper install, TIG welded a m5 bolt shank onto the front face of the tailstock quill so it can retract fully and eject non-tang tapers. Made an angle shelf and bolted each jaw solid, works brilliant. Did this before...

I already have home position setup and looping from 359 back to 0. I like your arc mins and secs implementation and miraculously 1 sec equals 24 full steps for me so implementing it will be easy. I was really stuck for a while and wanted to suit your sketch to my hardware, but as your lcd...

yep :fan: My coding was basic back then too, I got the hang of it but it was only an intro module first year and then a basics module the next. I was never a developer, I went to IT support... until I became an engineer 10 yrs ago that is. Not using graphics as such, but highlighting menu...

Hi Rod (hi everyone else also) I have too been developing an arduino controller like so many others, and thought I was doing really good :D... I ironed out a lot of issues and rounding errors, I been doing really well, then I stumbled across your code... :o and mine is no way as efficient...