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Type: Posts; User: RCaffin

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  1. Replies
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    Re: Vertical lines while engraving wood

    You have a bug in the code.
    You do not mention how you generated the code, but I assume it was a CAM package. It looks as though the laser was not turned off during a flyback of some sort. How you...
  2. Thread: CNC 'jumps'

    by RCaffin
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    49

    Re: CNC 'jumps'

    Thousands of them on ebay.
    But I suggest you should check the alignment between the motor and the shaft. Those couplings are not all that fragile, so there must have been a lot of flexing to get...
  3. Re: Looking for some advice v carving letters in 3mm aluminium

    I THINK they eventually switched to kero plus an exhaust fan. :)
    I use an automated pulsed misting spray of 3 parts kero to 1 part olive oil. So little liquid gets used that there is no smell and...
  4. Re: Looking for some advice v carving letters in 3mm aluminium

    Mate of mine was doing a production job on soft Al and was using metho. Problem was, by the end of each day he was over the driving limit!

    Cheers
  5. Replies
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    Re: Mach3 Partial Lockup

    Thinking...
    Not executing the m30 at the end could be one thing, although the program has run successfully on occasions.
    Not executing the m5 before that is another matter. That is a real problem....
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    Re: G68 Coord Rotation

    Hi TP

    The conditional code bit is nice. I can produce conditional code in Mach3, but it requires some dexterity.
    Rotations - both G10 and G68 seem to have the potential to leave one totally...
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    Re: G31 not working

    Sorry, can't help with the UC100 side of things. I use an ESS myself.

    I do know that there is a problem with many LPT converters. Mach3 under XP uses the LPT port in ways a bit different from a...
  8. Thread: Mobile CNC

    by RCaffin
    Replies
    4
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    37

    Re: Mobile CNC

    Fascinating - the apps one can get.
    Mach3 has a built-in 'wizard' which does the text-to-gcode bit for a dozen or so scripts. I find it very useful.

    Cheers
    Roger
  9. Replies
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    Re: G31 not working

    It does not help that you have provided next to no information about your setup.
    Since some G31 instructions do work for you, I don't think the problem is in the Mach SW.
    Do you have limits set up?...
  10. Replies
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    Re: G68 Coord Rotation

    Does it help if I point out that Mach3 does G68 dead easy?
    Thought not. Sorry.

    Cheers
    Roger
  11. Thread: Mobile CNC

    by RCaffin
    Replies
    4
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    37

    Re: Mobile CNC

    Just for a moment there, I had this vision of a CNC running off a mobile PHONE!

    Cheers
    Roger
  12. Re: Looking for some advice v carving letters in 3mm aluminium

    Store-bought Al is usually terrible for machining. REALLY!

    You could try tapered ball nosed cutters at 2,000 - 3,000 RPM, with metho or kero lubricant. You WILL need the lubricant to prevent...
  13. Replies
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    Re: Mach3 Partial Lockup

    Run-time option on Mach3 to turn the path display screen off. May help.
    How much free memory in the laptop?
    Any network connection (by any means)? This is a big no-no.

    At the worst, you could...
  14. Thread: CNC 'jumps'

    by RCaffin
    Replies
    12
    Views
    49

    Re: CNC 'jumps'

    Overwhelming probability that it is a mechanical problem with the movement on that axis.
    We would need more info on the hardware.

    Cheers
    Roger
  15. Replies
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    1,876

    Poll: Re: Machinist or Machine Operator? You decide..

    you are hungry, and you like to play with fire
    Yup!
    431064
    Playing with fire...

    And hungry
    431066
    Well, not when I had finished, anyhow.
    (Stove behind white gas canister)
  16. Replies
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    1,876

    Poll: Re: Machinist or Machine Operator? You decide..

    @Ian

    I have a hobby of making very small, ultra-light, remote inverted canister stoves for walkers traveling in the snow. I have sold >150 of them (and paid off my CNC in the process). This is one...
  17. Replies
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    1,876

    Poll: Re: Machinist or Machine Operator? You decide..

    Seems to me that this argument is obsolete, or at the very least seriously lacking.
    What do you call the person who decides how the part should be machined on the CNC equipment available and then...
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    Re: Epoxy Granite Portal Machine

    The HTD is definitely a modern upgrade over the old trapezoidal (XL) timing belts. The difference is the modern curved tooth shape vs the old angular shape. I suspect that the GT2/3 may be even...
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    Re: Epoxy Granite Portal Machine

    There might be some noise from the toothed belt if you are using one of the original 'timing belt' designs (with backlash), but the modern designs such as GT2 & GT3 are pretty much silent.

    Cheers...
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    Re: Epoxy Granite Portal Machine

    If by stepping up gear 4/1 to reach 12000rpm on spindle, with using the timing belt, will there be too much noise?
    That depends on the quality and size of the bearings, their alignment, and the mass...
  21. Replies
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    Re: constant stopping for no reason

    scroll down to Estop & uncheck "Enable".
    Only one problem...it won't let me disable it?
    Correct. You can NOT disable the eStop signal. Safety reasons. But the SS can filter noise out.

    Cheers...
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    Re: constant stopping for no reason

    'Some assembly may be required ...'

    You would need to adapt the microswitch to the mechanical part of the common (twist to release) eStop button.
    But that might be the fun part!

    Cheers
    Roger...
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    Re: 1st Build, will this be a decent Design?

    That will help for sure. It would help if you could lift the heat sink 5 - 10 mm up in the air: get better air circulation.

    As for the discharge rate - that sounds really wrong to me. Those...
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    Re: constant stopping for no reason

    I suspect you had a noisy eStop line. This can be fixed.

    Can I assume that the trigger for the eStop is a mechanical switch? A common problem here is that the contacts may be rated for 240 VAC 10...
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    Re: Newby questions

    Define 'detailed'.

    You can buy square end mills down to well under 1.0 mm diameter. You can buy ball end mills down near that too (or lower?). Not that below about 4 mm OD cutters start rising in...
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