... If I'm not mistaken you'll actually get more like 155V (110*1.414). Unless you're thinking of using a second transformer to drop from 110VAC to about 55VAC...
Hi All, I am working on a large milling machine that has field wound DC servos fitted. I am wondering if there is some way to figure out what voltage to run...
... Bob thanks for that but I want to stay with servo's on this machine. It is one of the rare BOSS ones that had servo's and I do have one installed motor ...
... good ... Just listed this on the page, Thanks. The ARCSIN seems like a direct competitor to the HobbyCNC board as they are both 3 amp and 40 plus volts. ...
... deal ... These drives keep rolling around on my wonder-how-it-works list. A question I have is comparing any of these to servos. Looking at Freds $65/3axis...
... Do you still have the original power supply? ... No, because they were designed for that. Without any info, there are ways to determine the proper field...
A brief update on finding a replacement power supply for the Positron-3A 3-axis DRO, for those who might need the information someday. Chris at Little Machine...
Hi Dave, What "surplusCenter" are you refering for those encoders? I went to http://www.surpluscenter.com and couldn't locate any encoders... Thanks IA Bloy ...
... Search their site for the word encoder. the only thing that comes up is a $12.95 motor with attached encoder. toos the motor, keep the encoder and you're...
Just a question... If, instead of tossing the motor, I used it. Using a .200 lead screw (5 turns per inch) and turning it @ 500 RPM to get 100 inches per...
I have a really nice linear stage that has aerotech linear motors, glass scale, end stops, linear rails, bearings and a table that mounts to the linear...
This list is for the discussion of CNC and related topics including CAD, CAM, EDM, & DRO. The list focuses on the construction of home shop CNC machines along...
CAD_CAM_EDM_DRO@yahoo...
May 1, 2005 8:29 pm
80887
I have a Dyna 2800 mill that is a perfect candidate for a pc based retrofit. I removed the z axis motor to lower the z axis manually and found out that the...
Ban them "no way" I did 3 jobs last week because they are used. One was on
a large 2" shaft out of a combine. I wish I had taken pictures of what had
to be...
Hi Jon, Thanks very much for getting back to me, and for your advice. I will do the tests you suggested this morning. I don't have the original setup, there...
... screw (5 ... minute, I'd ... to that ... torque the ... pulses per ... Be careful with that one (Item# 10-1834). I'm not too sure it has a 5v encoder. I...
I have about a pallet of new Teletype parts (in marked envelopes) Boxes of Teletype Paper, and boxes of Teletype Tape). I don't want any of this. It is about...
bobmcknight@...
May 1, 2005 10:10 pm
80892
It is a 5V encoder - 200 lines, 4 wires. If I remember correctly the colours are: Red = 5V, black = 0V, green + white = A and B. The disc is metal and is...
Power supply current actually decreases with increasing supply voltage on switching type drives. Switching type drives (choppers, PWM, etc) are current...
PacSci gives a MAX voltage rating for their steppers. To find the rated voltage, multiply the phase current times the resistance. Gerry ... question ... 80V...
I have a question... I see small CNC lathes that have follow rests available for them. Is is possible to chuck a bar of steel roughly the length of the bed, ...
Be careful of that "Max rated voltage". It is the voltage above which the motor windings might arc-over, not necessarily the voltage you want to run the motors...
... screw (5 ... minute, I'd ... to that ... the ... pulses per ... Yes. The motor is rated for 24 volts (good) but 0.1 amp. (Bad) even an old nema23 motor...
Hi Jeff I think you would find that you get much better results using a bar puller to advance the material through the chuck for each part, doing the turning ...
... Wow, pretty crazy stuff! Well, it this case, the fields are going to be low-voltage, high current, so don't apply 50 V to them! It might take 5 V max to...
Jeff, I'm not a lathe guy but, I ran mills (machining centers)for many years. All the lathes I saw running a steady rest or follow rest had a live center setup...
A follower rest is strictly for supporting a flimsy bar such that it doesn't deflect away from the tool. If there was no center in the end of the bar, as soon...
As stated, this could be dangerous. A follow rest only contacts the material in two places and should basically be used with a center in the tail stock. Might...
Shortly after the PMDX-131 breakout/motherboard combo for Gecko stepper motor drivers was announced there were new G202/212 drivers announced by Geckodrive....
