Re: [Emc-users] Stepper motor and driver selection
Aaron, > The gantry weighs about 70Kg and I have 16mm lead screws with > 4mm pitch. Could some one tell me what specs I need so i can look out for > stuff on ebay UK. > I have 6.4 Nm (~ 900 oz inch) motors, my gantry weighs about 80-90 Kg and 16mm lead screws with 5mm pitch. The motors are way too strong but my microstepper drivers are not able to get the motors running faster than 400 revs/min. Motor type is 34SM095-064-8W-SB12-6.4 and the drivers MSD-50-5.6 connected to a 42 V powersupply, both from www.stappenmotor.nl. Force applied on the gantry goes up to 4000 N - this is big, too big. 2.5 Nm should be big enough, even for such a heavy machine. I am going to buy an extra 2.5 Nm motor for the A-axis, hoping that this motor (as promissed) will give a higher speed. If you can, buy a combination that is specified with the wanted max. speed you want. For motor drivers: use only current controlled types with as high as a voltage as you dare. The higher the max. output voltage, the more speed you'll reach. Select a driver with (at least) a 40 volt supply voltage for good results. Rob - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Stepper motor and driver selection
Aaron, > The gantry weighs about 70Kg and I have 16mm lead screws with > 4mm pitch. Could some one tell me what specs I need so i can look out for > stuff on ebay UK. > I have 6.4 Nm (~ 900 oz inch) motors, my gantry weighs about 80-90 Kg and 16mm lead screws with 5mm pitch. The motors are way too strong but my microstepper drivers are not able to get the motors running faster than 400 revs/min. Motor type is 34SM095-064-8W-SB12-6.4 and the drivers MSD-50-5.6 connected to a 42 V powersupply, both from www.stappenmotor.nl. Force applied on the gantry goes up to 4000 N - this is big, too big. 2.5 Nm should be big enough, even for such a heavy machine. I am going to buy an extra 2.5 Nm motor for the A-axis, hoping that this motor (as promissed) will give a higher speed. If you can, buy a combination that is specified with the wanted max. speed you want. For motor drivers: use only current controlled types with as high as a voltage as you dare. The higher the max. output voltage, the more speed you'll reach. Select a driver with (at least) a 40 volt supply voltage for good results. Rob - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Stepper motor and driver selection
I have a mechanical setup very similar to what you have described. I am not using any micro-step of the motors and have so far seen excellent results. My workspace is about 20 inches by 20 inches. Here is a typical stepper motor spec for what you can use: http://www.anaheimautomation.com/manuals/L010175%20-%2014Y%20Series%20Spec%20Sheet.pdf I am using a motor similar to the 14Y203S-LW4 (1.8 deg per step / NEMA 14 mount). Each motor driver is nearly identical to this: http://home.att.net/~wzmicro/l298.html There are others, but this works well and is readily available. I am driving the motor with 12 volts. I see about 2 amps for all three motors when stopped. A 1284 / parallel port works great for driving the motors. Don't worry about the operating voltage of the motor itself. The motor driver will "chop" the drive voltage to maintain whatever motor current you select. You need to have a larger operating voltage because the motor will generate a significant back EMF while operating. The higher drive voltage will allow the motor to run at rated torque before dropping off. EMC will handle the ramping and acceleration for the motor / load. I typically use 50 inches / minute motion speed while cutting wood. Jim Combs (Lexington, Ky) - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Stepper motor and driver selection
Hi I have almost completed the frame and gantry for a w/w router and need advice on stepper motors and drivers. As a wood worker I know very little about these things, but use linux and very much want to use EMC to control the thing. The gantry weighs about 70Kg and I have 16mm lead screws with 4mm pitch. Could some one tell me what specs I need so i can look out for stuff on ebay UK. TIA Aaron -- Powered by Outblaze - This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2008. http://clk.atdmt.com/MRT/go/vse012070mrt/direct/01/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
