Bridgeport series I mill using dynomotion controller

[krz2_2000]

Yes we are using the old motors. We do have spindle speed control using a C program that puts 2 buttons on the main screen INC and DEC. We didn't hook up a tach yet though. We use the G-Code. We have a CAD/CAM software that generates G-Code so we just use that. Any other information you want just ask and I'll let you know.

[cut more]

You mentioned that you had to make some electronics for the set-up to work with the original amps, could you elaborate a bit on what it took to get the Dynomotion to play nice with the amps?
What speed is the rapid now? How accurate is the machine?

Sorry about all the q's. I just finished a job with my stock R2E3 that was a pain. The memory is too small for the whole proogram and everytime I try drip feeding it will choke during a part.

Thanks,
Cutmore

[krz2_2000]

Originally Posted by cut more You mentioned that you had to make some electronics for the set-up to work with the original amps, could you elaborate a bit on what it took to get the Dynomotion to play nice with the amps? What speed is the rapid now? How accurate is the machine? Sorry about all the q's. I just finished a job with my stock R2E3 that was a pain. The memory is too small for the whole proogram and everytime I try drip feeding it will choke during a part. Thanks, Cutmore

We just used the +/-10 D/A from the Kmotion to drive the amps. I'm not sure how fast the table moves we had to play with that alot to get it as fast as we could. The machine is as accurate as it was before we converted it. The main electronics stuff we did was wire the 4 wire encoders into differential IC's to produce a 2 wire signal for the Kmotion. We used optical isolators(opto-couplers) on almost everything to protect the kmotion. We used FETs to sinc current for the spindle. I have some generic schematics that I made for the system if you have Microsoft Visio I can send them to you and you can check the out. Anything else you need just ask.

[cut more]

Thanks for the info,
I do have access to visio and I would appreciate the files if you don't mind.
So the Dynomotion will not take quadrature input?
I am not electronic savvy enough to know what you meant about using the Fet's to sinc the spindle current. Is that to monitor the spindle current as an input to the Dynomotion card?

Thanks,
Cutmore

[krz2_2000]

If you want to give me an email I'll send you this files. We had to take the FMDC board and the EAF board out of the bridgeport. We had to use high current transistors (FET's) to replace the ones in the bridgeport. The way it's wired is there is 24 volts to the spindle motor and you havae to provide a ground path. There are only 4 pair of encoder inputs on the kmotion and if you want to have a handwheel you'll use all 4. you may be able to use more of the I/O ports for encoders but we didn't.

[G90G00MAN]

I have a jetmatic milling machine with the kmotion 4 axis board installed . after I work out the bugs with tom , Now the motion board works grate. there is some bugs with the tool offset's but I can work over the problem for now.

[DennisCNC]

^^g..man,

Are you using Mach3 or Tom's gcode program?

[G90G00MAN]

I am running tom's KMOTION gcode program. at this time I am working out some bug's with mach3 and kmotion. just so you know mach3 and kmotion will work. the bug's are with my machine config.


Dan aka G90G00MAN FOR THE BANDIT PEOPLE G90/MAN

[G90G00MAN]

I have a post for bobcad 20.5 that works with kmotion 2.23 .
the post is a start but it will need some more updates and feedback
from bobcad users.

thank's

Dan

[ferman]

Hi Dennis,
We converted an Extron milling machine to Mach3 with Kanalog/Kflop to run the older Panasonic analog controllers and servos.
We completely removed the old computer gear and use a secondhand IBM Thinkcentre with Mach3 and the 'puter connected, via USB, to the Dynomotion board.
Hugely successful, with a lot of exceptionally helpful input from Tom Kerekes.
If it can be made to work then he's your man.
If I can be of any help then let me know. Ross