Bridgeport servo motor selection

[Boyan Silyavski]

You are a rich person. For that money you will buy 3 motors and drives from BST Automation (800euro), plus Servo motor for the spindle (450euro) so you could rigid tap, then buy (700euro) controller copy from Aliexpress -Newkye , pay 250 euros for DHl and even pay your duty tax and still half from what they want

[komatias]

You are a rich person. For that money you will buy 3 motors and drives from BST Automation (800euro), plus Servo motor for the spindle (450euro) so you could rigid tap, then buy (700euro) controller copy from Aliexpress -Newkye , pay 250 euros for DHl and even pay your duty tax and still half from what they want

What spindle motor is that Boyan?

[Boyan Silyavski]

What spindle motor is that Boyan?

They sell 2.3kw servo motor for that money if sb feels like fiddling. Though i have read that VFD and encoder also could do the trick. I just sait its cause i saw the big motor for that money. Anyone should check if this is specifically possible due to shaft sizes, length, etc. Anyway, for me anything is possible if i put my mind on it. There is always a way

[komatias]

They sell 2.3kw servo motor for that money if sb feels like fiddling. Though i have read that VFD and encoder also could do the trick. I just sait its cause i saw the big motor for that money. Anyone should check if this is specifically possible due to shaft sizes, length, etc. Anyway, for me anything is possible if i put my mind on it. There is always a way

Commutation servos usually go to 3K rpm. Spindles should go to 6K preferably. Have you per chance found a VFD with encoder inputs or are looking to feed the signal back to the controller? The latter is potentially possible in Mach too, Novakon do that I think.

[Colin Barron]

You are a rich person. For that money you will buy 3 motors and drives from BST Automation (800euro), plus Servo motor for the spindle (450euro) so you could rigid tap, then buy (700euro) controller copy from Aliexpress -Newkye , pay 250 euros for DHl and even pay your duty tax and still half from what they want

I was really looking for the sizing information. They are suggesting that a motor sizes of 1.5kw are optimum wheras most on this website suggest 750w. Are BST good quality, i noticed the panasonics for about £500. Is the 700 euro a copy of the gsk?
Thanks for the reply.

[komatias]

Collin,

I am pretty sure the 750W is enough since you are going to gear it. The 1.5kW however for $90 is not a bad deal. I know that GSK controllers and Servos work well together and you will get decent support for them.

Just be warned that the 980MDc and any 980 for that matter requires a bit of ladder tweaking and macro writing if you are planning to use repeatable Z tooling like the stuff I sell.

[Davek0974]

Collin,

I am pretty sure the 750W is enough since you are going to gear it.

I did my BP conversion just over a year ago, all motors etc from BST on Aliexpress, great guy.

I used 750W AC servo with 2:1 reduction on X & Y, 400W with 2:1 reduction on Z, I still have not even made these motors warm up yet, I doubt a Bridgeport is going to be able to take a big enough cut to even bother a 750W motor.

My spindle is a 3kW investor rated motor, not a servo but I added an encoder and can do rigid tapping very nicely at lower speeds. Top speed is 4000rpm, bottom without back gear is 300rpm.

I am just adding another 750W servo to the knee so i can send it tool length compensation and keep all the quill travel for the work.

[jfroux_1]

I did my BP conversion just over a year ago, all motors etc from BST on Aliexpress, great guy.

I used 750W AC servo with 2:1 reduction on X & Y, 400W with 2:1 reduction on Z, I still have not even made these motors warm up yet, I doubt a Bridgeport is going to be able to take a big enough cut to even bother a 750W motor.

My spindle is a 3kW investor rated motor, not a servo but I added an encoder and can do rigid tapping very nicely at lower speeds. Top speed is 3000rpm, bottom without back gear is 300rpm.

I am just adding another 750W servo to the knee so i can send it tool length compensation and keep all the quill travel for the work.

I'd like to convert my BP into a CNC milling. I'm not sure what I need... should I take servo motor with break. Do you have a liste of everything you had to buy for your BP?

[Davek0974]

Hi
no you do not need motors with brakes, just plain AC servo motors, I got mine on Aliexpress from China.

I do not have a list, sorry.

[jfroux_1]

Hi
no you do not need motors with brakes, just plain AC servo motors, I got mine on Aliexpress from China.

I do not have a list, sorry.

I found the AC servo motors 0.75kw 80ST-M02430 2.39N.M 3000rpm and Servo driver with Servo cable 80ST (750 W for XY and 400W for Z), the timing belt and pulley, I have the pc, what else do I need to make it work? Can you send me few pictures of your setup? My email is [email protected]
Thanks