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Type: Posts; User: robe_uk

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  1. Re: Used 4x8 CNC Mogul $400 should i buy or should i run?

    What an impossible question for anyone to answer without seeing it, the thing could be worn out and not even worth $400. Having a quick look on google at a mogul I wouldn't pay $750 for a used one.
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    Re: Wiring NPN NC sensors to DB25-1205 BOB

    You are going to have to have the -ve connected.

    here is a video showing some information I found https://youtu.be/F7BjZElStfQ
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    Re: Small Portable Machine

    Maybe look at the xcarve https://www.inventables.com/technologies/x-carve/choose or the Shapeoko https://shop.carbide3d.com/products/shapeoko3?variant=14064088580157
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    Re: X-axis jumping rack and pinion

    I think you have the pivot point too high, can you move your pivot/mounting point down so the motor assembly is more horizontal with the rack?
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    Re: Junkyard find CNC build

    oh, where abouts? am it Northern Ireland also and would love a poke around that yard
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    Re: Circle problems

    excellent, well done
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    Re: Rack and Pinion UK

    racks can be joined to form longer lengths, plenty of google information showing how
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    Re: Circle problems

    backlash or losing steps on the Y, but with the flattened section and the ends not meeting most likely as Gerry has said backlash
  9. Thread: CNC Height?

    by robe_uk
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    Poll: Re: CNC Height?

    Well whatever height you decide on be sure to include whatever feet/levelers you are going to use, I forgot and now my table is a couple of inches higher than planned, no big deal but annoying none...
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    Re: Bens convert mdf CNC to plywood

    Looking good,
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    Re: Bens convert mdf CNC to plywood

    Its handy the you can cut the new parts on the old. May I suggest investigating the cost of support rails linear bearings as these are getting cheaper, of course everything is relative to your...
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    Re: Home CNC - Show off your work!

    The last thing I made was a box, I wanted to try using inventables Easel software, I used the box making app. The default for the toolpath was on the line which caused the gaps that the joints. Cut...
  13. Re: 80/20 with HGR25/HGH25 Linear Rails/Bearings

    Great looking machine, well done
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    Re: DIY CNC Hot Wire Cutter

    Great job, look forward to seeing what you cut. What software are you using?
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    Re: Insulators...HELP! :)

    try googling ceramic strain insulator and you may get something you are looking for
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    Re: MadeInTheShed's Steel build

    Good looking machine
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    Re: PICStep not working!

    This is what I did many moons ago

    By using the hex file I didn't have to worry about setting the config bits.

    How did you program your chips originally?
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    Re: Threaded rod, Leadscrew, or belt drive ?

    make yourself a delrin nut and never worry about backlash, it'll be so small that you'll not notice it when cutting foam with a hot wire. Also use stainless steel threaded rod as it tends to be...
  19. Thread: R&P problems

    by robe_uk
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    This is worth checking on, also might be worth...

    This is worth checking on, also might be worth checking are the gears squared to the rack correctly?
  20. Looking good

    Looking good
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    drill pattern generator

    Hi all
    Am trying to track down a piece of software I seen once that could take a bitmap picture and generate a drill pattern using the image for the outline. I think the example showed a skull and...
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    Ok, what type of drive? Screw or rack and pinion?...

    Ok, what type of drive? Screw or rack and pinion? A screw might be 10 turns per inch (roughly) which would account for the steps you are seeing, again please post more info of your setup.
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    Maybe check your controller micro step setting

    Maybe check your controller micro step setting
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    I'd stick with two motors, loads of builds here...

    I'd stick with two motors, loads of builds here using two with no problems and it will ensure no racking during normal operation, sure you can tied then will belts and pulleys if you wanted but i'd...
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    Well i think its cheap enough to get one to try,...

    Well i think its cheap enough to get one to try, am sure when your machine is running its only using a few Amps so there is plenty of over head available that you should have no/minimal voltage drop....
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    Nice machining, am impressed how well the alu...

    Nice machining, am impressed how well the alu polished up, did it take much effort to get that finish?

    Rob
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    look for pcb drill bits, 1/8'' shank with tiny...

    look for pcb drill bits, 1/8'' shank with tiny drill bit.
  28. What lists! And I think am guilty of nearly all...

    What lists! And I think am guilty of nearly all points, I tend to rush in without proper planning, end up making mistakes which can dishearten and slow/stall a build. So my advice would be do some...
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    looks like your machine is still running well, ...

    looks like your machine is still running well, how long did it take to cut the sheet out and how did you hold it down? You'll have to watch out now as you'll have a queue of guys looking for you to...
  30. Sorry but people will need more info on your...

    Sorry but people will need more info on your setup, type of computer, ie laptop or desktop, type of drives, interface board if any etc. But a stab in the dark might be voltage levels from your...
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