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...
68809
ja_erickson
Jan 1, 2004 2:55 pm
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...
68810
antson20022
Jan 1, 2004 3:00 pm
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...
68811
Brian
ka1bbg
Jan 1, 2004 4:10 pm
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...
68812
jntambs
Jan 1, 2004 4:21 pm
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...
68813
Gregory Kamysz
gregkamysz
Jan 1, 2004 5:08 pm
... 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...
68814
Ray Henry
rehenry@...
Jan 1, 2004 5:28 pm
... 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...
68815
Greg Jackson
sailorjackson
Jan 1, 2004 6:21 pm
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...
68816
Mariss Freimanis
mariss92705
Jan 1, 2004 7:28 pm
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 ...
68817
andrebarclay
Jan 1, 2004 8:10 pm
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...
68818
Gregory Kamysz
gregkamysz
Jan 1, 2004 8:25 pm
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....
68819
Mariss Freimanis
mariss92705
Jan 1, 2004 9:07 pm
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...
68820
bull2003winkle
Jan 1, 2004 9:55 pm
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...
68821
Greg Jackson
sailorjackson
Jan 1, 2004 10:34 pm
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...
68822
Mariss Freimanis
mariss92705
Jan 1, 2004 11:33 pm
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...
68823
industrialhobbies
industrialho...
Jan 2, 2004 12:04 am
Encoders I sell comes with 12 ft cords, and I see no problems. You can easily use 10+ feet on the cord from the PC to the geckos Thanks Aaron Moss ...
68824
industrialhobbies
industrialho...
Jan 2, 2004 12:04 am
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...
68825
shockley333
Jan 2, 2004 12:04 am
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...
68826
Larry
reiss_machinist
Jan 2, 2004 12:05 am
... 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...
68827
wayne_j_hill
wjh45dakota
Jan 2, 2004 12:05 am
... drive ... Not Used ... drive ... Not Used ... Not Used ... Not Used ... directly to this. ... Signal Ground ... drain this to? Earth Ground or Not Used ...
68828
tommy clay
tclay_35117
Jan 2, 2004 12:50 am
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...
68829
Mariss Freimanis
mariss92705
Jan 2, 2004 1:23 am
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,...
68830
seb fontana
speedoo51
Jan 2, 2004 2:51 am
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...
68831
Sammy
brain812000
Jan 2, 2004 2:52 am
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...
68832
Jon Elson
jmelson2
Jan 2, 2004 3:18 am
... 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...
68833
Jon Elson
jmelson2
Jan 2, 2004 3:33 am
... 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-...
68834
ibewgypsie
Jan 2, 2004 3:51 am
Better heat sink clamping? Pretty good drive but I have "killed" a few of the 201's. I do not own any at this time. David Cofer...
68835
turbulatordude
Jan 2, 2004 3:55 am
... may ... etc. ... this ... Hi Sammy, this list IS the written report ! Any more consoladated and we would be doing your homework ! ...
68836
andrebarclay
Jan 2, 2004 4:18 am
... Thanks to all of you who responded to my questions. Without this group, many of us would have given up a long time ago. Andre Barclay...
68838
Mariss Freimanis
mariss92705
Jan 2, 2004 6:09 am
Yeah, well what ever. I know you from the other group you hang out in. Enough said. Mariss ... few ... G204V ... Vampires ... therefore ... but ... stone- ... ...
