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| Servo Driven 4th Axis for CNC Mill |
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| gasmeter:
Hi Andrew I replied to this post even though its old . I'm looking at adding a 4th axis to my TNC355 (Denford quatromill). Silly question The fourth axis that's on input X4.. In which case its a sine wave encoder ? X5 is quadrature square wave . What encoder did you use on your system , I see it has to be 180000 or 36000. I'm in s wales by the way and do get to sussex from time to time Peter |
| awemawson:
Peter, if you are passing do pop in and have a look. My encoder came from the late lamented good chap John Stevenson, it was a sine wave Heidenhain off a Bridgeport Interact and I'll see if I can find any numbers - hang on . . . . . . . worryingly my entire directory not only describing this build, but also all my data on the Beaver Partmaster for which it was built seems to have vanished from my hard drive :bugeye: . . .but all is not lost, as it is detailed and pictured in reply #2 of this thread - it's a ROD 450B :thumbup: (Later Note: for some odd reason the entire 'lost' Beaver Partmaster directory had become a sub-directory off my Ingersoll Rand Drier directory so just needed moving back - but why did that happen :scratch: :scratch: ) |
| gasmeter:
Hi Andrew I would love to next time I'm in sussex . My mother in law lives in Blackboys near uckfield. Do you have the numbers after the Rod 450B as they say what the number of pulses is. I find the Heidenhain numbering system confusing . Pete |
| awemawson:
If you read the thread I'm sure that there was long discussion regarding counts per rev and belt ratios, however I do have a picture of the encoder (also embedded in this thread) of the encoder with numbers - here it is again: |
| gasmeter:
Thanks Andrew I can't see the number of pulses on that picture but I just order a ROD 456 1800 02S09-04 Sinusoidal Rotary Encoder. This will be a 1800 pulse (i'm assuming 1800 is the pulse per rev .. Again not sure of their numbering system) so I can gear it to give 36000, as it was a reasonable price. The RI+/- signal confuses me and I can't find any info anywhere . Is it a once per rev ? And needs selective gating so it can only appear during a specific angle range ? I think I same something about gating in th thread so I will work back through it . Peter |
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