So again please I'm not picking on you just trying to show that throwing advice around without considering all the variables and relevancys can be disatrous for a new person.!! . . . . . . . I know this from helping many that have unwittingly fallen foul of such good intentions.!!
Originally Posted by george ukhi jazz
I was suggesting options for 4ft by 4ft table, up to a full size table, and just trying to give him a general idea. . If you read my post, i had suggested that, i also said i did not know enough about R&P.
Exactly so best not to suggest anything.!! . . . There's a saying . . "Better to remain silent and be thought a fool than to open ones mouth and remove all doubt" . . . . . Not 100% relavent or possibly fair but I do like it. .Lol
Dangerous Dave - am trying to suggest this to you
1. You can not go cheap on the motors and electrics, Decide on a frame size, gantry style, then let that choose for you
2. Machines above 4f are a lot harder, whereas, the machine i pointed to, and suggested, Is probley a good all round starting point. there art a few things you could make cheeper, like the bed, single baerings. You could even try find the bed at the scrappy, and mount and true the top like He shows in his thread.
"Better to remain silent and be thought a fool than to open ones mouth and remove all doubt""Better to remain silent and be thought a fool than to open ones mouth and remove all doubt"
Information and help like what's below is great Advise and perfectly fine but you can't be specific and advise motors,rails etc with no information to go on like in this case.
Even now your comments about compensating with larger rails and screws for lack of Engineering is just WRONG ADVISE and all this would lead to is a very Expensive under performing machine or worse failure.!!
I'm not saying this because it's an Opinion of mine, I say it from lots of experience dealing with folks who have mis-understood or not read enough etc. Which you could say "More fool them" but my point and why I jump on this sort of thing is because it does happen and it doesn't need to happen so if folks just held off or asked for more info before posting then others wouldn't fall foul so easily.
Again DON'T think you a fool and I appologise for it coming over that way.!!. . . .
Last edited by JAZZCNC; 11-01-2014 at 01:36 PM.
Barnes Wallace, Brunel , mary bell, Copernicus, Galileo, Bor, --- a long line of people that was considered fools,
However George, there is no certainty that a thread, post or even a question will get replied to, only probability! so actually I think you were correct to contribute what you could/did. This is a discussion forum after all.
Last edited by Lee Roberts; 12-01-2014 at 12:29 AM. Reason: speeling :).Me
Make your own enclosure and use a breakout board and individual axis drivers - buy a spare axis driver, test them all and when everything's working rotate your spare occasionally. That way you have a spare when an axis fails on Sunday morning ;-)
Building all the mechanics first is a given, you can get it all working without steppers and add the electrics afterwards.
To clarify my previous post here,
My comments addressed the act of contributing to a discussion, not the quality or the specifics of that contribution.
It would be fundamentally incorrect to suggest another member should not contribute to a discussion, on a discussion forum. Irrespective of whether or not one considers another member to be a fool, no one has that authority here.
I refer you to the Forum Guidelines:
What you should NOT do:
5. Discuss or link to objectionable and/or offensive topics. This is not permitted and includes but is not limited to: things of a violent nature, pornography, sexism, racism and/or other discriminatory subjects, this includes things considered to be as a “joke”.
Also perfectly acceptable, is to make a directly challenging, specifics targeting contribution to a discussion and is encouraged where a member considers it necessary.
Last edited by Lee Roberts; 12-01-2014 at 11:54 PM. Reason: grammar.Me
You of all people being the Forum owner should be Backing me up on this kind of thing not telling someone they where correct to post what they did.!! . . . In this case you would have been better keeping your mouth Shut which you have seem to have been expertly doing on other matters for the last several months.!!
Hiding behind forum rules or guide lines is pathetic when what you should be doing is guiding from the front your self and backing up experienced members not doing what appears to be undermining them.!
In the interest of keeping the Post on Topic I've said all I'm saying about this matter now.!!
After a day playing around, one of the drives went pop for no reason at all. I did some research and it seems TB6600 chips are crap at any reasonable current, I was running 36v/4.2A and they get *Very* hot which is likely why it failed.
I then bought a different drive, ebay again, different chip, but after messing with it for a day it didn't want to talk to the cheap breakout board
In the end I returned the whole lot of cheap crap and spent 3 times as much at CNC4YOU.co.uk, on three drives and a decent board. Their phone service is second to none and delivery was next morning, can't speak high enough about them
Being a small machine meant i could get away with not worrying too much about mass etc, this has been proved now as I can tune the drives to stupid speeds way beyond plasma usage and it still runs perfectly, on a big machine though I would have been more concerned.
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