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| Building a Drag Engraver by c. raynerd |
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| raynerd:
John, cheers for replying - I`m guessing that if it is making wierd noises in anything but half step mode for you as well, it isn`t just me doing something wrong. Strange drivers...they seem really tempremental! To be fair to it, it is working just fine in these settings, you just can`t make any changes! Chris |
| HS93:
--- Quote from: DaveH on April 05, 2012, 03:15:23 PM --- --- Quote from: HS93 on April 04, 2012, 09:39:07 PM ---what is the tip made of that does the engraving ? Peter --- End quote --- Peter, The tip is made of carbon :lol: :lol: :lol: " I'm a wealth of knowledge ot times" :D :beer: DaveH --- End quote --- Havent you got a web site to wreck :) :) :ddb: :nrocks: :ddb: Peter :ddb: :nrocks: :ddb: |
| kwackers:
--- Quote from: craynerd on April 05, 2012, 03:00:56 PM ---Also, with 200 step/rev and 1/2 step (current setting) = 400 steps/rev and with a 2mm pitch leadscrew = 200 steps/rev. That isn`t very good resolution in my opinion but if I change this to 1/8 multistepping my --- End quote --- 1 step = 1/200th of a millimetre (about 2/10ths of a thou??) in what way isn't that very good? I guarantee backlash, play and bending moments will easily eat that up and a lot more. Worth pointing out that microstepping isn't a method of getting more resolution, it's mainly to make the motors run more smoothly. When microstepping the microsteps aren't linear interpolations of 'proper' steps. Half stepping is as good as it gets in terms of accuracy. |
| raynerd:
Kawckers- that is well pointed out and I consider myself told!!! :whip: :whip: Your totally correct, I`m currently going to be getting 1/200 of mm resolution! I`m still curious as to know why I can`t get the driver running with annything other than half stepping. |
| kwackers:
TBH it's not that long ago I realised that microstepping was next to useless as a mechanism for improving resolution... I like the diamond drag thingy though which has given me an idea. What I'm curious about is whether I could use it to score glass for cutting, or whether it would be better to use the standard tungsten wheel set slightly behind the centre line so it'll steer. |
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