High speed working, Synchronisation shift and delay time management

Manufacturers are facing constant pressure on their production costs. However, solutions can be found thanks to the exceptional versatility and productivity of MultiDECO machines. The TORNOS specialists, who are constantly striving towards improvement, are hoping to involve their end-users in looking into ways of improving their output, by getting them to discuss their experiences.
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Tips and Tricks

High speed working
Synchronisation shift and delay time management

Compatibility :
MULTIDECO
Technology
•  PNC
•  TB-DECO
•  Software Hotline
•  Tips and Tricks

Manufacturers are facing constant pressure on their production costs. However, solutions can be found thanks to the exceptional versatility and productivity of MultiDECO machines. The TORNOS specialists, who are constantly striving towards improvement, are hoping to involve their end-users in looking into ways of improving their output, by getting them to discuss their experiences.

Synchronisation shift

Synchronisation is essential to operate DECO and MultiDECO programs. Against a black outline in the program windows, it supplies a link between 2 operations. Depending on what is required, one can anticipate or delay (shift) the start or finish of an operation in relation to another. The main effect is a millimetric adjustment, thereby enabling, amongst other things, tools feed in masked time. The most simple and interesting use is achieved along the longest operating line, at the time of tool feed and following barrel indexing.

527.5


The picture above shows is an example of the high-speed program. A production rate of 527.5 parts per hour is achieved with a program lasting 5.1 seconds. An actual output of 80% is used when working out production time. (This 80% output is good and currently used for small parts turning. It can change, depending on operation, material and tooling).

45 itp


With the synchro shift, we anticipated 45 itp with operation 4.3 synchronised in the Z12 X2 operation line.
The result obtained is shown, to the above left of the two views. Production increased from 527.5 parts per hour to 564.7 parts per hour.
7% increase in production - achieved without even increasing the feed or cutting rates!

synchro


The TB-DECO help heading describes the controls for carrying out a synchronisation time shift.

Conditions of use

A synchronisation time shift following indexing, for example, is a valuable tool to achieve output. It must be used with care and without restraint. Follow the recommendations below:
  • Account must be taken of the overall space requirements of the tools in question.
  • Because of the position on the machine (e.g. position 1, 2, 3, etc..), the retraction value for indexing is fairly high. Those positions showing the greatest degree of retraction of axis X, show the worst positions.
  • It is advisable to maintain a safety margin when the tools approach, so as to prevent any damage.
Tips:
1. In some cases envisage tool release along the plane of axis Z as opposed to axis X.
2. When proceeding with a synchronisation shift following indexing, one often starts by entering a value in the order of 15 itp. If successful, continue with searching for an increase in capacity by successively adding 3-4 itp.
3. Do not forget that the increase will be expressed as m/s or in parts per min. by the program. This increase must be confirmed within one or more days.


Delay time management

Using the same logic, don't lose sight of any parts that may be lost in the chips because of a poorly managed recovery system ! That could reach up to 4%!

It should be pointed out that the "TB-DECO model" used as a basis for executing our programs is designed to work in cycle times of less than 4 seconds. This pre-supposes a very tight control of the time earmarked for each function of the cutting position.

For those numerous programs with considerably longer cycle times, where position 6 or 8 is not overworked, it may be possible to enter even longer delay times coupled with a slower bucket return travel time.

Delay time management


A. M405 G4 X1 (do not forget that a delay time of 1 second is only used to brake from 8,000 to 0 rpm. For slower speeds, count 0.1 sec per 1000 rpm.

B. M160    G4 X0.1 (X0.2)    (X0.3 maxi)    M111

C. (G4 X0.2)    M161    Same delay times in these two operations!

D. (G4 X0.2)    G1 Z28=#2013 G100    Same delay times in these two operations!

E. The speed of the counter spindle can be increased, as opposed to the stopping speed. (Do not forget to enter an identical value for S4 in "Spindle Manager").

In RED, the delay times that can be amended or added to.


Tips:
1. Enter the smallest successive values whilst taking note of the effects.
2. Those parts not lost, will increase the rate of production. This increase must be confirmed in 1 or more days.


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