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  1. Hi I went through this saga with my own...

    Hi
    I went through this saga with my own machines. I went as far as consulting with a tribologist at a major oil company.
    You have already said that modern oils are better than anything available...
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    I have no idea. I don't work for Prusa. I don't...

    I have no idea. I don't work for Prusa. I don't have any connection with Prusaa beyond buying one of their printers.
    Just check any review of Prusa printers. They all say much the same thing.
    ...
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    Hi I wanted a printer capable of reliably...

    Hi

    I wanted a printer capable of reliably printing a range of plastics. I didn't want to be 40hours into a print that then fails.
    I chose Prusa They always get good reviews.

    In addition,...
  4. Thread: LEGO Machine Shop

    by dazz
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    4,117

    Hi I couldn't help noticing that the operator...

    Hi
    I couldn't help noticing that the operator isn't wearing safety glasses. Safety first right. Just saying.

    The shaper is my favourite.

    Dazz
  5. Hi You don't need to use brass. It only acts as...

    Hi
    You don't need to use brass. It only acts as a magnetic insulator. You could use expoxy glue (not JB weld. It contains metal) if the magnets are wedged away from the steel. You could glue in...
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    Hi For L3-04, the manual states "When using a...

    Hi

    For L3-04, the manual states "When using a braking resistor, use setting "0"." Not much wiggle room in that statement.

    For L3-04, the manual states for setting "2: Intelligent - The active...
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    Hi You have nailed the problem I am trying to...

    Hi

    You have nailed the problem I am trying to solve. The VFD E-Stop/fast braking is not 100% reliable in every case, and that you may have a heavier chuck or work piece that will cause the VFD to...
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    Hi I should have said "if there is some unknown...

    Hi
    I should have said "if there is some unknown limitation or constraint."

    The mechanical motor brake fitted to the original motor could not be transferred to the new motor.

    I have normal...
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    Hi I already have DC braking configured for all...

    Hi
    I already have DC braking configured for all stops. I can't separately configure strong DC braking for e-stops. I generally stop/start often so I don't want to push too much stopping energy...
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    Hi The fundamental problem is that the Yaskawa...

    Hi
    The fundamental problem is that the Yaskawa vfd's (all models) do not have the feature I am looking for. No amount of tuning parameters will solve that. DriveWorksEZ offers the potential to...
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    Hi At the time of purchase, a 3.8kW VFD was the...

    Hi
    At the time of purchase, a 3.8kW VFD was the highest power 1phase VFD available.

    I have not been able to find the rating of the braking resistor switch. That will limit the lowest resistance...
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    That was my first assumption. I did some more...

    That was my first assumption.

    I did some more testing and tried the things suggested by Yaskawa. They did not achieve what I wanted. Their suggestion was to extend the deceleration time until...
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    All of the medical experts I have heard say...

    All of the medical experts I have heard say testing is the key to managing the pandemic.
    It is really hard to tell if the barriers to testing in the USA are plain incompetence, or intentional to...
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    I am really interested to hear if that experience...

    I am really interested to hear if that experience is consistent across the rest of the USA.
    Do the millions of unemployed and uninsured US Citizens have free and easy access to covid 19...
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    Actually I think the opposite. All the responses...

    Actually I think the opposite.
    All the responses by countries around the world are lead by politicians, who are taking advice from their medical and economic experts to varying degrees.

    Of all...
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    It's only crap if you ignore the evidence. ...

    It's only crap if you ignore the evidence.


    In 2011, 28 US senators wrote to President Barack Obama calling for free-trade talks to crack down on national drug-buying bodies using "arbitrary and...
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    Hi Just got an answer from Yaskawa. They...

    Hi
    Just got an answer from Yaskawa.
    They recommend set L3-04=0 and then lower C1-01 as much as possible.

    I see Yaskawa has introduced the GA800 and GA500 drives. Probably the best choice for...
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    The USA model of states and hospitals...

    The USA model of states and hospitals bidding/buying on their own account is that it allows USA drug companies to hike the price. It is one of the reasons that drug prices are so expensive in the...
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    The setting L3-02 = 2 Intelligent stop, fast as...

    The setting L3-02 = 2 Intelligent stop, fast as possible, appears to be the function I am looking for, but there is no indication that this setting can be used with an external braking resistor. I...
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    Hi Here is a case where the behaviour of real...

    Hi

    Here is a case where the behaviour of real people in a real and life threatening situation is likely to follow the behaviour of real people in the make-believe games world.

    This has been the...
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    Hi Tragically, the USA covid 19 infection...

    Hi
    Tragically, the USA covid 19 infection trajectory is outstanding for the wrong reasons. The USA is the only country tracking between cases doubling every 2 and 3 days. At this rate, the...
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    Hi I have only retrofitted a couple of lathes...

    Hi
    I have only retrofitted a couple of lathes with vfd but in both cases, I discarded the entire electrical protection and control system.
    I kept the control switches (door micro-switches,...
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    All of these require a worst case approach...

    All of these require a worst case approach resulting in a longer braking time. If I set up my drive to include maximum sized job (max inertia) and max speed, the time to stop would be far too long. ...
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    The 60Hz - 67Hz values are arbitrary. The choice...

    The 60Hz - 67Hz values are arbitrary. The choice of an empty chuck as a test load was also arbitrary. The tests were intended to look at behaviors, not set points. In an e-stop should cause the...
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    Hi I have added my settings to the end of each...

    Hi
    I have added my settings to the end of each line. Not much difference between them.
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