Greg- RPM was derived by placeing a "tag" of electrical tape on the shaft of the motor and letting it "slap" a piece of cardboard on every rotation. This was...
Happy New Year, What is considered to be the maximum length of the encoder wires from the encoder to the drives (without using an additional line driver)? When...
I have some brand new SEM servo motors that I got on e-bay. P/N is MT30H4-44. There is a tach in the back end where I want to put an encoder. The problem is...
Hi, good chance they are "Locktited" and might need some gentle heat to loosen the locktite. i am not familiar with those motors but most are locktited to keep...
Hi, I have been wanting to get in to cnc for some time. I have some experience with machining (mainly self taught) and have a nice home shop setup. I am...
... Yes, that should be good. Model airplane guys use a similar method for measuring engine rpm in the air by recording the exhaust note. You can even...
... I find this report fascinating because the result of the empirical, real-world tests seem to run counter to the prevailing wisdom. The only thing that you...
Ray Henry
rehenry@...
Jan 1, 2004 5:28 pm
68815
I did not record the speed, but it was more a problem with the load than with the speed/torque profile. I was using stepper motors with shorted windings as...
Couple of comments: 1) Backdriving a stepper with its windings shorted is the reverse of having a stepper delivering mechanical power to a load while being ...
Happy New Year to all, I would be a lot happier if I could hook up these damn servos to my gecko 320s. I talked to Mariss @ Gecko and in his usual fashion...
If your encoders are like mine they won't work with the Gecko 320. Mine were sine wave encoders and don't have the proper signal for the Gecko to understand....
Andre, good afternoon and Happy New Year! From the look of things what you have there is a differential output encoder. The biggest problem with it might be...
Hi: I am getting ready to help a friend replace the Boss 3 with a new controller. I can't find specifications for the stepper motors on that mill. Does anyone...
Regarding item 2, I do not see this in practice. I suspect this is based on the motor theory for normal operation, where the rotor poles do not pass over a...
Well, I try to develop theory from empirical experiments instead of forcing results to match a preconcieved theory. It's like the horse and carriage thing. I...
You might want to think about just converting a mill. 5 Bears has some serious time into his setup, and unless you have that kind of time the project may just...
Hi all. I have to build a precise positioning device. I am experineced with stepper, but now going for servos. Having actually decided for dc brush, i have...
... My sugestion I too am making an egg plotter. I will use steppers an the related pc board from older 5.25' floppy drives. use older floppy drives wherein...
... drive ... Not Used ... drive ... Not Used ... Not Used ... Not Used ... directly to this. ... Signal Ground ... drain this to? Earth Ground or Not Used ...
Shockley, An AC Inverter is only capable of speed control. If you want to do position control with an AC motor, you need a Vector drive. Also, don't confuse...
Due to recent events, the "bullet-proof" G201 has been renamed G204V and moved up to the front burner on the development stove. Vampires are very hard to kill,...
I am wondering if it is possible [not that I could do it] to make or purchase a Tracer and/or Digitiseing attachment? I figure alot of stuff is allready in in...
hello All, i am a final year student in belfast northern ireland who is making a CNC PCB drilling machine...PICTURES TO COME SOON.. Some of you may remember me...
... Why are you destroying these motors? Are you going to use it with direct drive to your leadscrew? If you drive the screws with a belt drive, you can...
... Connect A+ to the Gecko phase A. Connect B+ to the Gecko phase B. Connect black (common) to the enc -. Connect a 470 Ohm resistor between enc+ and enc-...
Yeah, well what ever. I know you from the other group you hang out in. Enough said. Mariss ... few ... G204V ... Vampires ... therefore ... but ... stone- ... ...
