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Type: Posts; User: wizard

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  1. Re: I need some direction on a new gantry build

    Are you certain thAt your issues are weight in the gantry? Frankly it could be a lot of things from detuned servos to backlash and a bunch of other possibilities. 200 pounds really isn’t a lot,...
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    Re: Options for vac table pump

    The reason you get so many answers is because there are so many possibilities that any one could be the right solution. At the very best you only get the atmospheric pressure per square inch and...
  3. Re: What's the best method for automatic depth setting?

    No picture of your switch installation. I mention that because how the switch is actuated is a big part of repeatability.


    In the distant past I made use of a Baumer My-Com switches. Th...
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    Re: Timing Belt Opinions

    Timing belts would be fine for a certain class of work, so the first question is what are your intentions.

    Beyond all of that timing belts for most router implementations are almost always...
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    Re: My DIY Dedicated Mach3 Control Panel

    Nice panel. I’m another that has never heard of iPac. Learning something new keeps me coming back!!!
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    Re: Size for ground wires

    Din Rail grounding maybe to code but that doesn’t mean that it is wise! There is huge variability in the quality of the din rail grounding systems I’ve seen. Combine that with the way some...
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    Re: Size for ground wires

    A few comments:

    A lot of the responses here are reflective of North American practices. Since most of us know little about code specifics in Germany you need to take comments here under...
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    Re: Size for ground wires

    Good info Al.

    Have you noticed safety relays being the heaviest maintenance item in modern control panels? Maybe semi modern. Maybe it is the implementation of the specifier but I have...
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    Re: A poor mans CNC machine

    I might mention that home centers suck when it comes to component costs. So not the best way to buy build materials, especially anything involving metal.

    My laptop died so I will not be able to...
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    Re: steel/aluminium fixed gantry build

    Barry

    Looks like you are off to a great start. As you are learning chip and dust management can be a bear. A machine enclosure can help but done well cost about as much as your build. That...
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    Re: CNC machines from plywood

    That is one nice looking machine!
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    Re: 1st Build, will this be a decent Design?

    The issue of blowing up a SMPS, from high bus voltages, is probably the best reason to avoid them. The alternative is to look for DC SMPS specifically designed for servo / stepper duty. The...
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    Re: 1st Build, will this be a decent Design?

    The electrical ampacity ratings of wire are based on a number of things including the temperature rating of the insulation. If you are in an area where the NEC applies acceptable current ratings can...
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    Re: 1st Build, will this be a decent Design?

    Given a fixed voltage if your current goes up power goes up.

    Rating power supplies for servo/stepper duty is a bit of a black art. Few implementations will have all drivers running at full...
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    Re: 1st Build, will this be a decent Design?

    Thanks for that l, bigger is what I meant.

    I’m actually wondering if there was a time when we universally had good capacitors? As for the Rifa capacitors that is a bad situation but having a...
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    Re: Experiments with Finger Joint Fixture

    Nice little retro fit. I like that”I used what I had on hand” mentality, sometimes it is required thinking.

    If might ask though how bad is tear out? I did not see a backer board unless of...
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    Re: 1st Build, will this be a decent Design?

    Capacitors don't matter as long as they are rated correctly for this type of application. Generally derating the voltage spec will lead to longer life at the expense of a bigger cap. 150 volt rated...
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    Re: Z-axis overshooting sometimes

    I wouldn’t randomly add cabinets because cabinets do little t address conducted EMI, they might not impact radiated EMI as much as you would think.

    Years ago, (decades? Yikes) I was trying to...
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    Re: 1st Build, will this be a decent Design?

    Not everything comes out of the Pacific Rim area! I’d be real surprised if there are no transformer / power supply builders in England or Europe.

    If not, it is very easy to get a Stepper...
  20. Re: Looking to buy a CNC Router, need help on brands

    If this is for a business venture, define your needs and choose the machine that best meets them. If this is more hobby oriented then which machine probably doesn’t matter though I’d look for ease...
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    Re: 1st Build, will this be a decent Design?

    A thought just occurred! The power supply issue can be completely eliminated by buying stepper drives with built in supplies ready to be wired up to line voltages. These drives will cost a bit more...
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    Re: 1st Build, will this be a decent Design?

    It depends upon the specs for the power supply. Switch mode supplies for example are often designed to work from 50HZ to 400 Hz with a similarly wide voltage input range. However not every supply...
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    Re: 1st Build, will this be a decent Design?

    Look for a supplier or electronics to the industrial markets. The parent company of Newark in the USA is based in England if I remember correctly. The problem is I can’t remember the name of that...
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    Re: CNC machines from plywood

    Yuriy

    For me looking elegant comes well after working well so I wouldn’t compromise a build to make it look good.

    About that finish issue. The one big challenge with anything wood related...
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    Re: Fixed Gantry Build

    UCBones.

    I think we have mis communicated here in a couple of ways.

    With respect to expiry granite filling aluminum T-Slot extrusions, there are several problems I will try to clear up.
    ...
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