CNC DECKEL FP1 home
 
CNC retrofitting a Deckel FP1

A while ago I visited a deckel owner in Germany. The first thing that struck me was that a Deckel FP1 is quite a category smaller than a MAHO SK250.
This man owned the machine for almost 8 years then he decided to convert his FP1 (build around 1953) to a CNC-controlled machine. The software, drives, steppermotors and spindles were bought as a set from PC-dreh (also in Germany). The mounting plates and the mountings were made by himself.

The machine is used for the fabrication of turbine-engineparts. That is turbine engines for model airplanes. Partly the engines are made of off-the-shelve turboloader parts and partly the parts are made by himself. The turbines have a thrust-power of 16 kg.

Click the pictures to enlarge.

The software runs on a pentium II machine. In the beginning a 486 was used but the maximum frequency depends on how fast the computer is and a 486 caused the machine to run too slow.
In the cabinetdoor are some controls mounted which are used for a manual override.

All motors are from Nanotec in Germany. I believe the type-codes have altered but here is an explanation of the code. All shafts have the same diameter (20 mm) and the same feed (5 mm). All pullys have the same gear-ratio I measured the outer pully diameter 37 and 127 mm. I think the belt thickness is about 3.5 mm, this leaves 30 and 120 mm, so the rate must be 1:4

X-axis

motor specs:
- nanotec steppermotor
- type: SH 8616M7508-c
- 1.8 degree
- 7.5 Amp
- 1.73 Volt

shaft specs:
- shaft driven
- dia 20 mm
- feed 5 mm
- safety cover due to safety reasons.
- pullyrate: 1:4
- belt width : 16 mm

The base mounting plates are made of 15 mm thick steel.

 
Y-axis

motor specs:
- nanotec steppermotor
- type: SH 8616M7508-c
- 1.8 degree
- 7.5 Amp
- 1.73 Volt

 

 shaft specs:
- nut driven
- dia 20 mm
- feed 5 mm
- belt width : 16 mm
- pullyrate: 1:4
 
 
Z-axis

motor specs:
- nanotec steppermotor
- type: 4H8618L0308
- 1.8 degree
- 6.7 Amp
- 3.0 Volt

 shaft specs:
- nut driven
- dia 20 mm
- feed 5 mm
- belt width: 16 mm T10/660
- pullyrate: 1:4
 
 
Coolant unit

The standard coolant reservoir in the bottom of the machine is not used. There always is some oil contamination and the coolant fluid cannot easely be changed in the bottomreservoir.

Therefore a smaller reservoir made from stainless steel is mounted to the leftside of the machine. Ofcourse the coolantpump is controlled by the computer.