Hi,

We tried _enablefixedgearing command to activate gearing and tried moving master axis. But slave is not moving. The function block call returns zero.

In our case, we are trying to implement this with two virtual axis. Created fixed gear technology object . In the motionin section we gave first virtual axis connection . In the second axis synchrous object we enabled interconnection with the fixed gear. In the interconnection view we can see motion in of fixed gear object is connected to first axis and motion out is connected to second axis synchronous object.

After issuing enablefixed gearing command we are thinking that the second axis will also move along with first axis(1:1, _pos command). But only first axis is moving. The second axis synchronous object sync state is inactive. 

What we are missing to make this working?

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Split from Fixed gear (TO).

Hi,

Thanks, that's working.

If the slave axis went to error state due to some reason during motion, does the master axis stops automatically?

Also I want to make sure that before any master movement fixed gear is enabled and slave is geared to it. For that which variable do we need to check?

jerry, your question is not very clear.

You got an error during gearing ? But when ? When launching gearing or when gearing was already done ?

Because the first case is the most classical one, where you launch (i.e.) an "immediate" gearing while master is moving, causing an error in the slave that cannot follow the master so fastly.

If your master is moving then you must launch gear with a synching strategy (spage or time based)

If your master is stopped, well, let it stay stopped until you have launched your gear (that in this case can be launched with immediate setting), then you can move your master without problems

Hi,

Iam trying to implement fixed gear using two virtual axis. Trying to simulate the effect. In our actual case, we have two real axis. This has to be geared everytime(1:1).

Since these are two real axis, if because of something if the slave axis in the configuration goes to error while movement (say encoder cable disconnected or some other reasons) , what will be the behaviour?  Will the master continuous to move? We have to avoid that behaviour. 

The steps is like this. During startup we enable fixed gear between two axis. For movement we will give _pos command to the master axis in the combination. 

Before _pos command to crosscheck whether the axis is geared to slave, which variable do we need to check? Also after issuing pos command if any errors occurs in the combination, we need to stop any further movement.

First question : unless you trap the Tech Alarm on Slave and do proper things (i.e. stop the whole machine), your master will not care about the problems of the slave and he will keep running. So you should trap the TO alarms and decide what to do.

Second question : to know ifyour slave is synchronized through a gearing command (or, equivalently, "if your gear command has been executed") you should see the property of the gearing TO called "State" which is an enumeration called "EnumFollowingState", it should pass from 61 (INACTIVE) to 54 (GEARING) (if gearing was a position gearing, otherwise 330 (VELOCITY_GEARING) if you have launched a speed gearing).

Regards

First question : unless you trap the Tech Alarm on Slave and do proper things (i.e. stop the whole machine), your master will not care about the problems of the slave and he will keep running. So you should trap the TO alarms and decide what to 

How to trap tech alarm?...

Technology Team

Hello,

Absolute or relative gearing

The fixed gearing can be set to absolute or relative gearing with the gearingType parameter

of the _enableFixedGearing command.

● With absolute synchronous operation (ABSOLUTE), the input and output values are

interpreted "absolutely", i.e., directly coupled.

● With relative synchronous operation (RELATIVE), the input and output are interpreted

"relatively", i.e., coupled with an offset.

I want to gear two linear axis in 1:1 ratio. I also want to perform active homing(Homing output cam and zero mark).

When i do homing on master axis, slave will follow master. But the end of homing when the master reaches zero mark, it will set the current position as zero. This will make the slave axis to move with high velocity to reach master position. Can i avoid this behaviour. The slave has to follow the master only when an actual movement takes place at the master position.

Is there any method to have this done?(MCC_gearIn or fixed gearing )