could be these one: http://www.motionking.com/Products/Hybrid_Stepper_Motors/2-phase/24H2A_Stepper_Motor_60mm_1.8degree.htm
up to 3.3Nm or from ebay: http://www.ebay.fr/itm/NEMA-24-Stepper-Motor-Schrittmotor-GB24H2100-42-4A-Single-Shaft-4Nm-CNC-/181439601418?pt=Motoren_Getriebe&hash=item2a3ea49b0a I have a setup with 3 of these (4Nm model), with 72V power supply (2x 300W 36V cheap ebay in serie), and DM856 servo amplifier, work like a charm. it exist as well with 1/4 axis, but I really prefer 8mm shaft diameter (metric system). to get en estimate of needed voltage: get the speed you need in rad/s (1t/s --> 6.28 rad/s) multiply by the torque in Nm this will give you the output power of motor at max speed. then, as you know the current inside the motor, you can deduce minimal needed voltage to get the same power (plus additional waste) for example: stepper: 4Nm, 4.2A need 1000rpm (5 m/min with 5mm leadscrew) power @ max speed and max torque: 1000/60*2*pi * 4 = 104 W P = U *I --> 104 / 4.2 = 25 --> we need at least 25V, but this is without taking any loss in accout (resistance, drive, sinus factor, ...). Doubling this value will get you something that shall do the tricks! (so 50V needed at least) this is a really rough calculation, but it help a lot to know what is needed. Claude Le 05.07.2014 19:08, Gene Heskett a écrit : > On Saturday 05 July 2014 12:06:33 Claude Froidevaux did opine > And Gene did reply: >> Hi, >> >> leadshine is a china brand of good quality stepper driver >> (automationlogic seem to be leadshine model DM856 for example, there is >> a lot of re-branding within leadshine drives) >> >> I like the digital version (DM series, you can tune out some resonance, >> work well). I don't know much about the standard serie (M series) > Responds well to the alternating stack of rubber and fender washers, > stacked about 2" long on the rear shaft. > >> BTW, nema24 motor is a quite interesting for the size / torque they >> propose. >> >> Claude > Those I have not seen, link please? > > Thanks Claude > > Cheers, Gene Heskett ------------------------------------------------------------------------------ Open source business process management suite built on Java and Eclipse Turn processes into business applications with Bonita BPM Community Edition Quickly connect people, data, and systems into organized workflows Winner of BOSSIE, CODIE, OW2 and Gartner awards http://p.sf.net/sfu/Bonitasoft _______________________________________________ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
