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  1. Replies
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    884

    Some new info here from OP: I tried waiting 20...

    Some new info here from OP:

    I tried waiting 20 minutes between restarts and it tripped. So I tried waiting an hour, still tripped. It seems that the aptly-named ESP100 senses when I've given up...
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    884

    Below is a copy of the time-current curve for the...

    Below is a copy of the time-current curve for the overload relay. TDegenhart was correct in that this relay has a hot and a cold curve and likely the performance of my RCP and lathe motor intersects...
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    You may be on to something with the memory...

    You may be on to something with the memory feature. That would explain why it always starts the first time after the RCP is turned on. I'll test if the lathe will start in quick (30s) succession if...
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    I tried adjustments on the relay from 14.5A...

    I tried adjustments on the relay from 14.5A (nameplate FLA) to 18A. Results didn't change. It tripped on the 2nd and subsequent restarts.

    I do not have an overload relay on the 7.5HP. The purpose...
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    Overload Sizing and FLA when using RPC

    This post is about a RCP that uses a 7.5HP idler and drives a 5HP lathe motor. All motors are wired for 230V.

    I used the FitchW method to balance phases and got these results which are textbook...
  6. I wouldn't know about that. I never dabbled in...

    I wouldn't know about that. I never dabbled in the small stuff. I generally stuck to 250-500HP 460 or 2,500V direct drive Frick or FES screw compressors pushing anhydrous ammonia. :D
  7. This board is a real gem. It definitely isn't the...

    This board is a real gem. It definitely isn't the case in all online communities that amateurs are welcomed and encouraged instead being condescended to or worse.
  8. There is definitely a feeling of pride as I watch...

    There is definitely a feeling of pride as I watch my YouTube machining mentors working on machines half the size of mine with lots of limitations that mine doesn't have. Then again, to whom much is...
  9. I took the old belts off and am running the lathe...

    I took the old belts off and am running the lathe on a single new belt with just the weight of the motor and plate providing tension. It hasn't showed any sign of slipping and I'm definitely not...
  10. Thanks to the guys that gave me advice in this...

    Thanks to the guys that gave me advice in this thread. I ended up getting a salvaged 7.5HP idler for a phase converter and a salvaged 5HP to power the lathe (the existing motor was labeled 230/460...
  11. I have a 60A 220V welding outlet near the machine...

    I have a 60A 220V welding outlet near the machine fortunately. I'll definitely look into the DIY RPC option.
  12. Not having a way to power the 5HP 3-phase motor...

    Not having a way to power the 5HP 3-phase motor yet, and wishing to preserve my current marital/financial status, I was thinking of swapping the 5HP with a cheap 3HP "farm-duty" motor running through...
  13. Thanks for the advice. You likely saved both me...

    Thanks for the advice. You likely saved both me and the dog a good deal of discomfort.
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    Based on your suggestion, I spent some time...

    Based on your suggestion, I spent some time browsing around Starrett and similar websites and think that I can use a couple of 72" steel straight edges and a 24" master square and get the tool within...
  15. Pictures as requested: Monarch Photo Album...

    Pictures as requested:
    Monarch Photo Album


    https://imgur.com/U6mixQ7.jpg
  16. Thanks for the suggestion. I've worked in...

    Thanks for the suggestion. I've worked in manufacturing for 20 years and have been around a couple of amputations and a fatality due to rotating equipment. But watching some of those videos still...
  17. Pros & Cons of starting off on a Monarch CY16 (18.5x30" 5HP) lathe

    I was in the market for a typical Home Shop Machinist lathe as my first tool but came across a deal on a 1944 Monarch CY16 that I couldn't turn down. So now she's sitting in my garage on skids.

    I...
  18. Replies
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    Check perpendicularity over 6 feet

    I have an X-Y gantry machine (similar to a laser sheet cutter) that I need to check the squareness and straightness of the axes on. The axes are stationary with tooling that travels along the axes...
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