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Type: Posts; User: RonaldoNZ

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  1. Replies
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    Re: ENCO RF45 Clone CNC Conversion - LinuxCNC

    Did you run your 750W servos with any reduction ratio? or direct 1:1?
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    Re: More Stepper Motor Woes

    "24v is very high for a stepper, so the poor performance is fully expected."

    An old thread but for any newbies or new readers, the above is complete rubbish, I consider 24V to be a low voltage...
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    Re: Electronic home switches made easy!

    Treat one sensor as fixed and the other you need to tune/position. I wouldn't call it difficult

    Sent from my SM-N9005 using Tapatalk
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    Re: Electronic home switches made easy!

    That's by design in order to square the axis.

    Sent from my SM-N9005 using Tapatalk
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    Re: Electronic home switches made easy!

    a quick look on ebay

    Blue Canare Quad Core Mic Microphone Cable L 4E6S 06 by The Foot | eBay
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    Re: Electronic home switches made easy!

    Look for shieled four core . those are shielded two core. You need power plus signal. ( 3) with the shield going to chassis ground.. Ideally

    Sent from my Vodafone 875 using Tapatalk
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    The base started with an old SGI power series...

    The base started with an old SGI power series server cabinet that now serves as my mobile workbench, on its side with its castors relocated.
    ...
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    You could weld them quite likely, check with your...

    You could weld them quite likely, check with your machinist. Exactly the situation with my one, it would be done on a large bridge mill that swallows things 10 times this size. They will chock it up....
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    I haven't cleaned it and put a gauge on it but...

    I haven't cleaned it and put a gauge on it but no, I highly doubt it. I'm planning to either get it milled (waiting for the quote) or pour some epoxy grout rail ways.
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    Haha, yes good advice re the Fea. :D 9mm in...

    Haha, yes good advice re the Fea. :D 9mm in this section and length makes it pretty redundant.

    I with you on the foam, I used it in the base with cable conduit in it to run some fixed cabling...
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    It will deflect of course, but not much. ...

    It will deflect of course, but not much.

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    No I wasn't saying that, the size you make the...

    No I wasn't saying that, the size you make the table in relation to the bearings is another matter, I was talking about the distance between the blocks across in relation to the distance between them...
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    If they were instead two solid bars at least...

    If they were instead two solid bars at least joining two on each side and perhaps 2~3x as wide with plenty of bolts, as they are they look like a significant source of potential wobble to me allso,...
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    Any sufficiently large vertical milling machine,...

    Any sufficiently large vertical milling machine, a common piece of equipment in most machine shops. They range in size from desktop to huge. EG
    Bridgeport (machine tool brand) - Wikipedia, the free...
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    Your machinist will be able to get them...

    Your machinist will be able to get them parrelall, they don't need to be all on the same plane for this. The vertically mounted blocks though would allow you some adjustability, its then a simple...
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    Lee makes a good point. FF/FK blocks could be...

    Lee makes a good point. FF/FK blocks could be used at the ends instead. They would mount vertically to the end crossmembers.

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    Yes you can have the rail faces milled equal...

    Yes you can have the rail faces milled equal height then the faces for the screw mounts at another height, they don't need to be coplanar and the machinist can cut them at whatever height is required...
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    If you are looking to buy new Hiwins I've had...

    If you are looking to buy new Hiwins I've had very good experience dealing with these guys in the past, I've just purchased two sets of HGH20CA and rails from them, BST Automation. The gear has...
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    Interesting, is that what you are running on your...

    Interesting, is that what you are running on your machine?
    Id have thought that lead would ..lead (cough) to a lot of backdriving of the motor and would require some counterweight setup, I'm making...
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    I wouldn't go near that first one, the ballscrew...

    I wouldn't go near that first one, the ballscrew is 10 mm per rev, not to be confused with a 10 tpi screw, I.E. turns per inch. So it's 2.54 TPI, thats a fast lead. It is also very narrow, too narrow...
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    Sorry my 500N load wasn't intended to represent...

    Sorry my 500N load wasn't intended to represent actual cutting forces, it's an arbitrary worst case number invented to compare geometries. Actual load is certainly going to be a lot smaller yes.
    ...
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    Plug and slot welds apart from the bearing face.

    Plug and slot welds apart from the bearing face.
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    I spent far more time thinking about the problem...

    I spent far more time thinking about the problem while developing mine than was healthy ;)

    Yes hopefully so re the usage scenario, in your own case you outline no problem. Although thats not...
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    And if your board is unpowered or faulty? No...

    And if your board is unpowered or faulty? No stop condition.

    You are still relying on a logic high or power on to signal the bob.

    I.E. How do you power that optocoupler to high if nothing is...
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    Here you go drieslaas, I used 500N in the X of...

    Here you go drieslaas, I used 500N in the X of the machine only, fixed contraints at beam ends.

    226226 226228 226230

    Find attached three detailed reports for each

    Edit: here is a side...
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    After more consideration of all the preceding...

    After more consideration of all the preceding information,running some FEA of my own and looking at the stiffness calculator found here ...

    cnc machine stiffness calculator

    (Credit to routercnc...
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    The bob will work (XYZA, by a fluke, but not as...

    The bob will work (XYZA, by a fluke, but not as it should.) out of the box. However the fix is very easy to make it work properly.

    All credit to John_100 for the discovery and the below images...
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    David thank you for the spreadsheet, brilliant! I...

    David thank you for the spreadsheet, brilliant! I tweaked it a little for my case (using four blocks per rail) screenshot attached. I'm using the LUU double length variant that has two bearings in...
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    Hopefully not to "derail" the thread but this...

    Hopefully not to "derail" the thread but this discussion has me thinking about this SBR rail. Some thoughts Id like to bounce off David in particular. I read your excellent posts re stiffness on...
  30. Take a look at the below pics kindly posted by...

    Take a look at the below pics kindly posted by john_100 in the electronic limit switches thread, This bob has a few wiring errors. Easily fixed though.

    222814

    222816


    original discussion...
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