Bridgeport CNC Mill
 | This tool is currently broken, please contact the area host for more information. |
| Owner/Loaner | PS:One |
|---|---|
| Serial Number | {{{serial}}} |
| Make/Model | Bridgeport Interact Series I CNC milling machine |
| Arrival Date | 2014 |
| Usability | no |
| Contact | Dean Anderson, Elizabeth Koprucki |
| Where | Machine Shop |
| Authorization Needed | yes |
| Hackable | no |
| Estimated Value | ~$2000 |
| Host Area | {{{hostarea}}} |
Description
A Bridgeport Series I Interact milling machine with a Heidenhain TNC151 controller.
Capacity
Maximum table weight, centrally located: 300 pounds
X-axis travel: 18"
Y-axis travel: 12"
Z-axis travel: 5"
Knee travel: 14 3/8"
Positional accuracy: .0005"
Lubricants
The automatic lubrication system uses Vactra #2 oil. If the reservoir gets too low, a sensor will prevent the Power Enable switch from operating.
What works so far
Spindle motor and variable speed drive.
Spindle brake
Y and Z servo motors and controllers
Automatic lubrication system works, but we haven't been able to verify that all surfaces are receiving oil.
The Heidenhain controller boots and performs some basic operations. It blows an internal fuse occasionally.
Open Issues
A cover for the variable speed drive and motor is cracked and bent. This cover holds the spindle drive bearing in place, so the misalignment of the bearing may cause problems with the bearing or the spindle drive spline. The cover should be replaced if possible or repaired.
The machine was wired at the factory for 460 volt 3 phase and we use 230 volt 3 phase in our shop. Ed and Dean rewired the motor and controller box, in a temporary fashion, to use 230v. It is currently using a 460 to 230 volt transformer, which will eventually be removed.
The draw bar is missing.
The machine didn't come have a power draw bar. We now have a Kurt pneumatic draw bar mechanism, but it may need work to make it fit our machine.
X, Y and Z limit switches need to be adjusted.
Y axis ball screw cover is bent and not sliding properly. It should be removed and replaced (or bent straight). Removal is difficult because it is bent.
Closed Issues
CMOS memory is used to store the machine parameters. the AA batteries that keep the memory alive leaked and caused minor damage to the battery carrier. We cleaned up the carrier and replaced the batteries. The parameters have been reloaded.
The spindle brake, spindle speed control and flood coolant system all are pneumatically driven and leaky. Maria Savrasova replaced the leaky fittings and tubing.
The original lubricating oil reservoir cracked. Todd Allen made a new reservoir out of acrylic using the laser cutter.
A machine screw was missing that held the ram to the column. It has been replaced.
A pneumatic line has been run from the shop air system to power the spindle brake, coolant and spindle speed control.