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Richard
Tracking the spindle backwards and forwards is not a feature that
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interests me, however tracking the spindle at varying speeds does. The problem that I have had with one pulse per rev monitoring is that if the spindle slows whilst cutting a deep thread the tool ends up cutting too much metal, the result is further slowing and probably a stall or broken tool. This has not happened with the encoder system. As you say pitches, feeds and tapers are pre-calculated in a spreadsheet. The current feed values are adequate for most people I would think. The tapers cover all of the MT plus a number of angle and ratio tapers. If a user feels that he would need a special then load it before the first compile. The same with threads the majority of metric and imperial threads are loaded. If a real special is subsequently required then yes it needs to be added and a recompile executed. Not a major problem IMHO and I have not needed to do it. Re cost, Steppers, drives and power supply are common to both so can be ignored. The RELS cost therefore comes down to:- Arduino Mega, Encoder, belt and two pulleys, 2 line display, 5 button pcb, 4 buttons with integral LED's, 1 joystick, 5v psu, 74LS86 chip+resistors+terminals+cable+connectors For me that comes at a say ?90. I make my own enclosures from 6mm laminate flooring so near zero cost there. Obviously your system includes the Z drive so that should be allowed for. The capability of cutting external and internal tapers was a big plus and something I have had no problems with, however that was not the case with another system! Having run both a one pulse per rev system and the RELS on my lathe I prefer the latter. Richard Edwards On 11/12/2019 09:03, John Dammeyer wrote:
Thanks for the endorsement Richard. But I know that there are features from the RELS that don't exist on mine. I'd really like to learn more about what is different. |
