The sensor components and mounting are shown in figure # 55. The sensor also has an indicating light to show when it is triggering making for easy alignment and visual confirmation other than using the diagnostics. The sensor actually has two sensors in it and only one was used. Was mounted onto a steel strip and attached to the casing.
Components amount to a rare earth magnet which is was super glued to a gear inside the spindle housing. Readout is dead on from the 53 – 2400 rpm of the lathe and doesn’t vary. I used a Hall sensor instead of a slotted disc. INDEX PULSE – MOUNTING / USING A HALLS SENSOR If you read the postings, it is obvious i knew what i was after and wanted. I guess if I had to do it all over, I should have CNC'd the Atlas a long time ago. I still have a number of refinements to make the accessories usable and a fair amount of testing to gain experience The intent of this conversion was to build a lathe that could do fine precision work but also be able to do larger work. Even though a lot of effort by Art and testing by users to make the threading cycle work with spindle slow down, there is no comparison if it doesn't happen in the first place. On the small threads, a few thou makes or breaks a usable thread while on the deeper threading 2 thou can create a spindle slowdown, force you to use flank threading, etc. The backlash is a real PITA if your doing threads, not only fine 0-80 but also deeper Just using code generated by the wizards, like turning down a shaft to dimension i was able to get within or better than the X axis backlash. 0004" and the Z is slightly under 0.001". Practical backlash on the converted Atlas is zero. Being fair to Sherline, it's still a nice little lathe for making small parts.
6 ATLAS LATHE HOW TO
I had the Sherline tweaked quite well, or maybe better said, after lots of testing i knew how to get the most out of it.