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Bridgeport Series II CNC Retrofit "shopping list"
« on: November 22, 2016, 02:20:55 AM »
Hello Gents,

I have recently acquired a BP Series II Interact II CNC with a V2XT controller that is kaput. As such, I would like to retrofit to modern components, ultimately resulting in a mach 4 based control and a VFD for the spindle motor so that I may run single phase power to it. I would like to retain the original servos since they are in good condition. I have posted data plates for the pertinent info on the mill. If anyone could help me form a shopping list of components that would result in a reliable system I would be most appreciative as well as a good VFD.

Thanks!



Re: Bridgeport Series II CNC Retrofit "shopping list"
« Reply #1 on: November 22, 2016, 06:44:14 AM »
Hi Brennon,
How much are you looking to spend?

Mike
We never have the time or money to do it right the first time, but we somehow manage to do it twice and then spend the money to get it right.
Re: Bridgeport Series II CNC Retrofit "shopping list"
« Reply #2 on: November 22, 2016, 11:47:34 AM »
I am not wanting anything hobby grade, but have  experience with electronics and such so i see no need to spend Centroid/Machmotion prices. I also dont mind buying used equipment as long as its good stuff. Would like to get everything under 2k if that is possible. I just dont know what i am looking at apparently as i cannot find anything that will support the volts and amps of the motors i have. I dont care about speed, but accuracy is the most important.
Re: Bridgeport Series II CNC Retrofit "shopping list"
« Reply #3 on: November 22, 2016, 04:51:10 PM »
AMC servo amps from ebay. Make sure you get the high voltage one not the 60v ones. Like these. http://www.ebay.com/itm/3-Advanced-Motion-Control-Servo-Amplifiers-BE25A20-Brushless-Drive-/222316691727? I am not sure but I think that the 65 amps on the motor name plate is stall torque. The drives listed will give you 25 peak and 12.5 cont. I have yet to stall one on my bridgeport.

I like my Hitachi VFD, although there are lot of good ones out there. Make sure you get sensorless vector at the minimum. Like this. http://www.ebay.com/itm/HITACHI-WJ200-022SF-VARIABLE-FREQUENCY-DRIVE-3-HP-230-VAC-SINGLE-PHASE-INPUT-/122228045983?hash=item1c755bf89f:g:uWYAAOSw9NdXtJxp


DSPMC/ip for the motion controller. Ebay is your friend. http://www.ebay.com/itm/222304776550?_trksid=p2055119.m1438.l2649&ssPageName=STRK%3AMEBIDX%3AIT.

CS labs is another good choice to control analog drives.

Once you get it running you  will realize that speed is what you need. Waiting for the machine to go anywhere gets old real fast. You should easily get 200-300 ipm out of that machine unless it has some really high tpi.. It should also be accurate unless it is worn out.

If you buy everything new $2k isn't going to cut it. (Pardon the pun)

Let me know if you have any more questions.

Mike
We never have the time or money to do it right the first time, but we somehow manage to do it twice and then spend the money to get it right.
Re: Bridgeport Series II CNC Retrofit "shopping list"
« Reply #4 on: November 22, 2016, 05:54:11 PM »
So when the controller is powered on I get "all axis fault " replacing the above components you mentioned and converting to mach4 should get rid of that right? I only ask because all axis fault or x y axis fault is pretty vague as to what the issue is.
Re: Bridgeport Series II CNC Retrofit "shopping list"
« Reply #5 on: November 22, 2016, 07:06:36 PM »
also, the link is for brushless dc drivers. the motors on my x,y,z are all brushed dc servos
Re: Bridgeport Series II CNC Retrofit "shopping list"
« Reply #6 on: November 22, 2016, 07:08:24 PM »
It sounds like you should talk to somebody who knows about the existing controller. It might be as easy as a startup procedure that you don't know about.
Brushless DC drives will drive brush motors in most cases. You will need to do a little research before you buy.
We never have the time or money to do it right the first time, but we somehow manage to do it twice and then spend the money to get it right.
Re: Bridgeport Series II CNC Retrofit "shopping list"
« Reply #7 on: November 22, 2016, 07:21:58 PM »
alright will do. I appreciate your help. So from what i understand, I dont necessarily need a driver rated at 112 v and 65 a to run the motors right? If thats the case then what would a safe minimum be?
Re: Bridgeport Series II CNC Retrofit "shopping list"
« Reply #8 on: November 22, 2016, 08:20:02 PM »
The voltage gives you the speed, the amps give you the torque. If you are not using massive endmills taking massive cuts then you don't need as much torque. The only caveat is acceleration can be limited if the amps are too low.

Are the servo motors connected directly to the screws or is there some sort of reduction?

Here is a bigger drive a lot closer to what you have for amps. http://www.ebay.com/itm/Advanced-Motion-Control-B30A40G-Brushless-Servo-Amplifier-T57876-/282003753960?hash=item41a8bbcbe8:g:rwAAAOSw8d9UxmZh

The motion Gurus will hopefully chime in if there a better option.

Mike
We never have the time or money to do it right the first time, but we somehow manage to do it twice and then spend the money to get it right.