The Ekdahl FAR - Limits: Difference between revisions

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== Hard and soft limits, the range of possibilities and need for calibration ==

Before getting into the weeds of how to change strings and [[The Ekdahl FAR - Getting started#bowing wheel|bowing wheel]]<nowiki/>s, you should know about the concept of ''hard'' and ''soft limits''.

Within automated machining, a ''hard limit'' is simply a point beyond or below which a machine will not function - an example of a ''hard limit'' in the Ekdahl FAR is for instance the maximum speed of the bowing wheel; at a certain point the motor simply cannot go any faster. A ''soft limit'' is a point <u>before</u> the ''hard limit'' where the machine in question technically could go further, but beyond which it may not be reliable, could potentially run into trouble due to external circumstances, or simply won't provide any benefits. An example of a ''soft limit'' in the Ekdahl FAR is the maximum [[The Ekdahl FAR - Getting started#Pressure|pressure]] of the [[The Ekdahl FAR - Getting started#bowing jack|bowing jack]]; at some point the [[The Ekdahl FAR - Getting started#bowing wheel|bowing wheel]] can be pressed so hard into the string that the motor simply won't have the power to keep up, this could result in the motor not emphasizing the correct overtones, the string distorting - or worst case, the motor overheating and being destroyed. A ''soft limit'' is placed before this point so that you won't run into these problems. All ''soft limits'' can be set by the user, but care has to be taken with limits that are there to protect the Ekdahl FAR. Other limits that are simply there to enhance the usability of the instrument can sometimes be tweaked to allow for "unmusical" behavior, which sometimes creates the most interesting sounds.

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''Bow pressure position max'' represents the maximum ''soft limit'', any added pressure at this point will be ignored as further pressure could make the bowing motor be unable to keep its speed or make it go over its power limit (which will cause the motor to immediately shut down in order to protect it).

The pressures ''hard limits'', i.e. how far the [[The Ekdahl FAR - Getting started#bowing jack|bowing jack]] can physically move up and down, can be set by loosening the two screws holding the pressure motor and sliding the carriage back and forth. This adjustment should rarely have to be performed as it should be pre-set, but if you change the height of the bridges, change into a string of a different thickness or a differently sized bowing wheel you may have to~~. The position of the carriage should~~ be ~~set so that when the~~ [[The Ekdahl FAR - ~~Getting started#bowing jack|bowing~~ jack~~]] is at its lowest mechanical point, the [[The Ekdahl FAR - Getting started~~#~~bowing wheel|bowing wheel]] is roughly 1mm away from the string. The easiest way to set~~ the ~~[[The Ekdahl FAR - Getting started#~~bowing jack|~~bowing jack~~]] to its lowest mechanical point is to use the [[The Ekdahl FAR - Configuration Utility|configuration utility]] and click the <s>"Reset pressure rest and go to rest position"-button in the "Basic bow parameters"</s>. This will set the ''bow pressure rest position'' to zero and tell the [[The Ekdahl FAR - Getting started#bowing jack|bowing jack]] to go to the ''bow pressure rest position''. If the shield is taken off of the Ekdahl FAR you can instead - while the unit is off - rotate the ''corkscrew'' that controls the position of the [[The Ekdahl FAR - Getting started#bowing jack|bowing jack]] to its minimum position.

The pressures ''hard limits'', i.e. how far the [[The Ekdahl FAR - Getting started#bowing jack|bowing jack]] can physically move up and down, will sometimes have to be [[The Ekdahl FAR - Bowing jack#Adjusting the bowing jack|adjusted]].

== Mute limits ==

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 == Hard and soft limits, the range of possibilities and need for calibration ==
 Before getting into the weeds of how to change strings and [[The Ekdahl FAR - Getting started#bowing wheel|bowing wheel]]<nowiki/>s, you should know about the concept of ''hard'' and ''soft limits''.
 Within automated machining, a ''hard limit'' is simply a point beyond or below which a machine will not function - an example of a ''hard limit'' in the Ekdahl FAR is for instance the maximum speed of the bowing wheel; at a certain point the motor simply cannot go any faster. A ''soft limit'' is a point <u>before</u> the ''hard limit'' where the machine in question technically could go further, but beyond which it may not be reliable, could potentially run into trouble due to external circumstances, or simply won't provide any benefits. An example of a ''soft limit'' in the Ekdahl FAR is the maximum [[The Ekdahl FAR - Getting started#Pressure|pressure]] of the [[The Ekdahl FAR - Getting started#bowing jack|bowing jack]]; at some point the [[The Ekdahl FAR - Getting started#bowing wheel|bowing wheel]] can be pressed so hard into the string that the motor simply won't have the power to keep up, this could result in the motor not emphasizing the correct overtones, the string distorting - or worst case, the motor overheating and being destroyed. A ''soft limit'' is placed before this point so that you won't run into these problems. All ''soft limits'' can be set by the user, but care has to be taken with limits that are there to protect the Ekdahl FAR. Other limits that are simply there to enhance the usability of the instrument can sometimes be tweaked to allow for "unmusical" behavior, which sometimes creates the most interesting sounds.
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 ''Bow pressure position max'' represents the maximum ''soft limit'', any added pressure at this point will be ignored as further pressure could make the bowing motor be unable to keep its speed or make it go over its power limit (which will cause the motor to immediately shut down in order to protect it).
-The pressures ''hard limits'', i.e. how far the [[The Ekdahl FAR - Getting started#bowing jack|bowing jack]] can physically move up and down, can be set by loosening the two screws holding the pressure motor and sliding the carriage back and forth. This adjustment should rarely have to be performed as it should be pre-set, but if you change the height of the bridges, change into a string of a different thickness or a differently sized bowing wheel you may have to. The position of the carriage should be set so that when the [[The Ekdahl FAR - Getting started#bowing jack|bowing jack]] is at its lowest mechanical point, the [[The Ekdahl FAR - Getting started#bowing wheel|bowing wheel]] is roughly 1mm away from the string. The easiest way to set the [[The Ekdahl FAR - Getting started#bowing jack|bowing jack]] to its lowest mechanical point is to use the [[The Ekdahl FAR - Configuration Utility|configuration utility]] and click the <s>"Reset pressure rest and go to rest position"-button in the "Basic bow parameters"</s>. This will set the ''bow pressure rest position'' to zero and tell the [[The Ekdahl FAR - Getting started#bowing jack|bowing jack]] to go to the ''bow pressure rest position''. If the shield is taken off of the Ekdahl FAR you can instead - while the unit is off - rotate the ''corkscrew'' that controls the position of the [[The Ekdahl FAR - Getting started#bowing jack|bowing jack]] to its minimum position.
+The pressures ''hard limits'', i.e. how far the [[The Ekdahl FAR - Getting started#bowing jack|bowing jack]] can physically move up and down, will sometimes have to be [[The Ekdahl FAR - Bowing jack#Adjusting the bowing jack|adjusted]].
 == Mute limits ==