Diy brushless spindle

This is a discussion on Diy brushless spindle within the Routers, Spindles & Controllers forums.

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  1. #121
    njhussey's Avatar
    Lives in Gloucester, United Kingdom. Last Activity: 4 Hours Ago Has been a member for 3-4 years. Has a total post count of 437. Received thanks 20 times, giving thanks to others 27 times.
    Quote Originally Posted by blackburn mark View Post
    i could have sworn i sent you some
    B***er...can't remember getting any...I did move house back in March tho so maybe they're there?
    Neil...

  2. #122
    blackburn mark's Avatar
    Lives in blackburn, United Kingdom. Last Activity: 01-02-2014 Has been a member for 3-4 years. Has a total post count of 586. Received thanks 30 times, giving thanks to others 17 times.
    i think they where sent in may... PM sent

  3. The Following User Says Thank You to blackburn mark For This Useful Post:


  4. #123
    njhussey's Avatar
    Lives in Gloucester, United Kingdom. Last Activity: 4 Hours Ago Has been a member for 3-4 years. Has a total post count of 437. Received thanks 20 times, giving thanks to others 27 times.
    PM replied to Mark.....

    I've got 150 off P188207 Belleville Washers coming early next week so think I should have enough for this and any other spindle I might be wanting to do :D
    Neil...

  5. #124
    m.marino's Avatar
    Lives in Edinburgh, United Kingdom. Last Activity: 5 Days Ago Has been a member for 5-6 years. Has a total post count of 389. Received thanks 16 times, giving thanks to others 8 times.
    Question to you guys is how well do the DC motors handle heat when running at different RPM's? Also would setting up a PID type closed loop controller work with a DC motor? Looking at options with one of the other members and a DC brush-less motor is looking like the best option for providing the need power and from the looks of it the needed RPM's as well. Has anyone though of side mounting the motor and connecting it via belts to the spindle (possibly using a key way to help lock the pulleys to their spindles). This would some variance in torque and from what I can see would really make the spindle have a rather wide range of uses.

    Just asking as kicking around ideas and designs and these are points that have run across. Anyone happen to know a source for variable speed AC motors in the 1.5kw range that don't cost the moon or come from questionable quality control?

    Michael

  6. #125
    Jonathan's Avatar
    Lives in Leicester (Home) or Nottingham University (2nd Home), United Kingdom. Current Activity: Viewing new computer with parrelel port? Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 3-4 years. Has a total post count of 3,220. Received thanks 260 times, giving thanks to others 8 times.
    I'm not sure if you're referring to the motors discussed in this thread, which are brushless AC motors, or normal DC motors? Either way a PID control algorithm can be used to improve the performance. A DC-servo motor is just the motor with encoder and PID control for position and speed.

    Old router build log here. New router build log here. Lathe build log here.

  7. #126
    blackburn mark's Avatar
    Lives in blackburn, United Kingdom. Last Activity: 01-02-2014 Has been a member for 3-4 years. Has a total post count of 586. Received thanks 30 times, giving thanks to others 17 times.
    Question to you guys is how well do the DC motors handle heat when running at different RPM's?
    Iv had no issues with motor heat... i could confidently push my spindles much harder if I needed to.
    Where i do have concerns is the ESP (speed controller) they do get hot... iv not blown one yet but i bought a spare because i thought i might with the amount of heat they push out (no problems though so far) at 20 (ish) its silly not to have a spare.

    with a 12v 350w power supply the majority of my spindles are vastly under the claimed potential and iv not once thought I needed more power/torque im sure our honorable speed freak friend Jonathan would want more speed n torque (you would need the extra speed if you wish to cut woodIm cutting plastic 90% of the time, I dont cut any wood at all)

    if your cutting wood and alli/plastics its worth weighing up if making two spindles is easier than dealing with pulleys on one ?

  8. #127
    njhussey's Avatar
    Lives in Gloucester, United Kingdom. Last Activity: 4 Hours Ago Has been a member for 3-4 years. Has a total post count of 437. Received thanks 20 times, giving thanks to others 27 times.
    Most model ESCs are mounted where there us some airflow (the ones I have in my planes all have air ducts directing air onto them and the one on my Trex 500 heli is on the side so in the downdraught) so I'll be putting a 24V fan by mine for cooling.



    Belleville washers arrived today but just back in from a weekend away so will be tomorrow before I complete the spindle now :)
    Neil...

  9. #128
    Jonathan's Avatar
    Lives in Leicester (Home) or Nottingham University (2nd Home), United Kingdom. Current Activity: Viewing new computer with parrelel port? Forum Superstar, has done so much to help others, they deserve a medal. Has been a member for 3-4 years. Has a total post count of 3,220. Received thanks 260 times, giving thanks to others 8 times.
    Quote Originally Posted by njhussey View Post
    Most model ESCs are mounted where there us some airflow (the ones I have in my planes all have air ducts directing air onto them and the one on my Trex 500 heli is on the side so in the downdraught) so I'll be putting a 24V fan by mine for cooling.
    A fan does make a big difference to the ESC (not ESP! ) temperature - I put fans on the ESC(s) in my model car for the same reason. A lot of model car ESCs include fans now since the airflow tends to be poor in that application.
    Bit off topic, but is that a genuine T-rex or did you get a cheap copy? I got the latter, but can't say I've used it much yet as I always seem to have other things to do...

    How much did all those springs cost?
    Old router build log here. New router build log here. Lathe build log here.

  10. #129
    njhussey's Avatar
    Lives in Gloucester, United Kingdom. Last Activity: 4 Hours Ago Has been a member for 3-4 years. Has a total post count of 437. Received thanks 20 times, giving thanks to others 27 times.
    It's a genuine Trex 700 nitro, don't think HK do a copy....yet ;)

    The main reason I've not got further with this project is I've probably spent 2.5k on helis in the last 18 months to the exclusion of everything else!

    They cost 15 + the dreaded and P&P so I think approx 25 in total...still got about 130 left :)
    Neil...

  11. #130
    njhussey's Avatar
    Lives in Gloucester, United Kingdom. Last Activity: 4 Hours Ago Has been a member for 3-4 years. Has a total post count of 437. Received thanks 20 times, giving thanks to others 27 times.
    Quote Originally Posted by Jonathan View Post
    Bit off topic, but is that a genuine T-rex or did you get a cheap copy?
    Just realised I'd said I had a Trex 500 in my text....yeah it's a genuine one...my Avatar is the 700...I did buy a HK450 but it's a bit like buying a router made from MDF with unsupported rails lol
    Neil...

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