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  1. william_b_noble

    Anvil Fever

    great answer - the key is the objective, which is only incedentially to produce little anvils and is actually to learn a skill. The same reason I'm trying to program an FPGA to do something - I have no need for an FPGA to do anything importaint (now) but I want to know why it's so hard.... (and...
  2. william_b_noble

    Anvil Fever

    why not use the one you are holding in your hand for a pattern, use a silicone mold agent and make a mold of it, then cast a plastic copy whcih you can modify with a different logo if you want, then repeat making a master mold of the modified copy. you can make several, put the spru in place...
  3. william_b_noble

    Printing airlock parts for my dust collector

    why not use a BBQ rotisserie motor to turn the rotor? cheap, modest RPM, 100% duty cycle
  4. william_b_noble

    Almost burned my shop down and didn't even know it

    I was explaining why I am emotionally allergic to Romex, and then, quite fortuitously, on another machinery related forum, this appears - the damage is from squirrels that found the wire to be quite tasty apparently. Consider this a warning provided by hyperspace rodents if you like, eschew Romex.
  5. william_b_noble

    Milling Vise Recommendations

    if you are disappointed with a premium tool, I would think you owe it to yourself and to the company to complain and give them a chance to make it right. it may be still worth giving them a chance, what does it cost you - 10 minutes to write an email and ask for their help? Personally I have a...
  6. william_b_noble

    Newbie needs advice about a lathe

    Wow, "English as she is spoke" an amazing book for those with a certain kind of warped sense of humor
  7. william_b_noble

    Newbie needs advice about a lathe

    RE MT and relationship to center drills - there is no relation, other than if you are using a tiny center drill (say 1/16") and your tailstock uses an MT5 (e.g. a huge lathe) you would use an adapter to get to an MT1 or 2 size so you could mount a small chuck that could actually hold the little...
  8. william_b_noble

    Selecting a Variable Speed Motor for Test Set-Ups

    ok, on my air compressor specifically, it is a Quincy (I don't remember the model #), it's an industrial unit with an oil pump and gauge, 80 gallon tank and I have it set for 160 psi, it will deliver about 21 CFM at that pressure if I remember the specs correctly. It does not get annoyed or...
  9. william_b_noble

    Almost burned my shop down and didn't even know it

    using romex is much much better than using zip cord (the cause of my friend's fire, pictured upthread, was assessed by the fire department to be electrical, he had a substantial amount of zip cord outside and over a few decades the insulation cracked and probably a rat had something to do with...
  10. william_b_noble

    Help on 8X12 Harbor Freight Lathe

    here is a schematic of how the thing has to be wired if it is a three coil motor (two run, one start), the start capacitor will be electrolytic, the run capacitor will be typically oil or at mylar. the run capacitor will have a microfarad value of single digit or low double digits, the start...
  11. william_b_noble

    Help on 8X12 Harbor Freight Lathe

    Ok, I think I can start on a diagram, but not tonight. That terminal strip makes things more confusing. We have an AC induction motor, capacitor start, capacitor run. I see green for on and red for off, is there a separate fwd/Rev switch? I presume the switch yiu showed is mechanically...
  12. william_b_noble

    Selecting a Variable Speed Motor for Test Set-Ups

    I am speaking from second hand exprience - I sold a bunch of treadmill motors at one point in time, as sold they had inadequate cooling and were ok for an occasional use drill press but certainly not for a lathe or mill where they would run for an hour or two. As for CNC motors, I don't have...
  13. william_b_noble

    Newbie needs advice about a lathe

    just a note - HSS is only expensive if you buy it new, not surplus. I have sold off probably 100 pounds or more of HSS from an estate for $2 to $5 per pound (depending on what and how nice). old broken end mills and saw blades are often HSS and make good tooling. for the queston about what...
  14. william_b_noble

    Almost burned my shop down and didn't even know it

    it's perhaps a matter of opinion but I am strongly opposed to romex, for any permanent wiring I always ensure the wiring is enclosed in a full metal jacket - EMT or for very short runs, flex, for burried or outdoors unsheltered rigid conduit. it's pretty easy to drive a nail through Romex, or...
  15. william_b_noble

    Help on 8X12 Harbor Freight Lathe

    if you can provide basic info about the electrical components, a wiring diagram should be trivial to sketch out. is it an AC or DC motor, for example, variable speed? etc
  16. william_b_noble

    Selecting a Variable Speed Motor for Test Set-Ups

    Beware of treadmill motors, the can be used, and can be controlled by a suitable controller, but they are generally open to the environment and not designed fot sustained power. Many tomes the power rating is optimistic. You are almost always better off with an industrial motor
  17. william_b_noble

    Newbie needs advice about a lathe

    I will respectfully disagree, we are both right in some way. The lathe in question is driven by an electronic drive, probably a 3hr33 phase AC drive. Every variable frequency AC drive I fave used attempts to drive the motor to the commanded speed. Zero rpm means just that, the machine is...
  18. william_b_noble

    Almost burned my shop down and didn't even know it

    The shock hazard of 240v is higher than 120, the potential for arc-over wit degraded insulation and water is also greater. And 220v plugs in the UK have integral fuses, at least the ones I have.
  19. william_b_noble

    For Sale pair of mini V-blocks and clamping pieces 1" cube blocks

    I'll probably need these next year, but this year I need some working space - I think these are probably shop made (both the V-blocks and the clamping pieces) but I don't know that for sure. One of the V-blocks has SIL stamped on one end, the other does not. they are almost an inch cube. $35...
  20. william_b_noble

    Newbie needs advice about a lathe

    let's go back to the original question of why the spindle turns at a low RPM - this is important - there is a huge difference between "off" and "zero RPM" to a controller. Off means it is unpowered. Zero RPM means that the motor is fully energized and will resist (to the best of its ability)...
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