Tips and Tricks
How to optimise counter-operation cycle time
and gain precious seconds ?
Compatibility :
MULTIDECO
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Basic assumption
The TB-DECO models were designed to operate under the most highly critical conditions. However, in many cases, it is possible to work with all the safety required by adapting the maximum safety factor to actual machining conditions.
It is therefore important to adjust certain parameters in relation to the part undergoing machining, in order to achieve maximum productivity.
Necessary safety features
When designing the TB-DECO, the reverse travel of the counter-spindle was parameterized by default to the maximum rear position. In most cases, this safety feature can be modified to optimise production without in any way jeopardising its safety.
Another feature of the TB-DECO is programming a stop for spindle M405. The time needed for the counter-spindle to come to a stop is not taken into account and the designers therefore added a time delay of 1 second to guarantee the complete stoppage of the counter-spindle. In the majority of cases, a time delay of 0.1 sec. per 1000 spindle revolutions is sufficient.
| Example |
| To illustrate the enormous benefits of these two tips, we proceeded with a real test under the following conditions: |
| Machine |
: |
MultiDECO 20/6 |
| Spindle speed |
: |
4000 rpm |
| Material |
: |
brass. |
| Part length |
: |
20 mm |
| Diameter |
: |
12 mm |
1. Program before optimisation
2. Modification in operation 15 : 1 of time G4 X1 to G4 X.2, which will produce a total stopping time of 424 ms for the counter-spindle to come to a stop at the time of part ejection (0.1 sec. per 1000 spindle revolutions is allowed in the majority of cases).
3. Modification in operation 15 : 2 of time G4 X1 to G4 X.75, which will produce a total stopping time of 976 ms for the counter-spindle to start rotating again. In this case, this can be adapted to each part because this is largely hidden time.
4. Modification of variable #3013 - extraction position from 300 to 250. This must be adapted to the length of the part and the part grip used.
5. Results following optimisation
Production before optimisation: 16.8 parts/min
Production after optimisation: 23.1 parts/min
An increase of 6.3 parts/min i.e. 37.5 %
To conclude: in this example where the counter-spindle is decisive for production time, adjusting these 2 parameters will increase productivity by 6.3 parts per minute, i.e. a 37.5% increase in productivity!
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