On Jan 29, 2014, at 10:22 AM, Jon Elson <[email protected]> wrote:
> On 01/29/2014 04:04 AM, Jeshua Lacock wrote: >>> they have a very affordable size 23 brushless motor, the >>> KL23BLS115, good for 180 Oz-In (but that is a RUNNING >>> rating, not a standstill rating). $52 without encoder. >>> You can get a good encoder with index from Digi-Key >>> for about $38. I have found this motor to work quite well >>> with my servo amps and our Universal PWM Controller. >> Hi Jon, >> >> Interesting - yeah works out to around the same price and would be a >> infinity better set up. > Well, checking on Automation Tech, the same motor is listed at > $78, I think. So, I don't know if Keling will honor the $52 price > still on the Keling web site. The keling site may now be a zombie > web site with nobody servicing the orders. > I notice Lin Engineering seems to have the exact same > motors, but they don't show prices online. >> Could I use the PWM Servo Amplifier to drive all 4 axes? > One brushless PWM servo amp will drive each motor, so for 4 axes, you'd > need 4 servo amps. I see. That would pretty much be a deal breaker as just the power supply alone for 5 axes would be $750. Could I use something else (not that I don't think its not worth it - I just don't have the budget). Can I use toroidal or switching power supply (even if it may mean going with brushed motors)? Or perhaps this driver: http://www.automationtechnologiesinc.com/products-page/nema23/dc-brushless-driver-for-kl23bls-115 >> I have had good luck with the encoders Kelling sells - I love that they have >> adjustable CPM. What encoders do you like? > That would be the AMT10x series. They are certainly very > affordable, but have some lag when the motor is accelerating. > I found it a lot easier to tune the servo loop when using classic > optical encoders without interpolation. I remember you mentioning that now. Do you like U.S. Digital or what is your preference? >> Anything else I need? Where does one get the connectors for your PWM Panel? > The connectors for the PWM controller are included. We now supply > 2-part pluggable screw-terminal connectors. Oh nice! >> One last question - how would you recommend going about adding a 5th axis? I >> could live with 4 axes for now manually setting a 5th axis (e.g. tilt - but >> 5 would be ideal). > Two PWM controllers can be "daisy chained" off one parallel > port, to go up to 8 axes. You can use the extra channels > for spindle encoder/speed control, jog pendant, etc. > When you connect the additional controller, the driver > automatically detects it and exports additional HAL pins. Awesome! Do they each get their own serial port? Best, Jeshua Lacock Founder/Engineer 3DTOPO Incorporated <http://3DTOPO.com> Phone: 208.462.4171 ------------------------------------------------------------------------------ WatchGuard Dimension instantly turns raw network data into actionable security intelligence. It gives you real-time visual feedback on key security issues and trends. Skip the complicated setup - simply import a virtual appliance and go from zero to informed in seconds. http://pubads.g.doubleclick.net/gampad/clk?id=123612991&iu=/4140/ostg.clktrk _______________________________________________ Emc-users mailing list [email protected] https://lists.sourceforge.net/lists/listinfo/emc-users
