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Considering AMS

Find out if robotic milking systems are an option for your farm here...


Location and Topography

Is there reliable mobile phone coverage and broadband available? The AMS requires broadband for remote servicing and phone coverage is essential so you are alerted to technical problems at the dairy.

How far away do you live from the dairy? You will need to attend to alarms that can occur anytime in 24 hours

Is the farm hilly, long and narrow or does it comprise fragments of land with roads in between? Experience to date suggests that walking distances of up to 1km present few issues for cows. It is not necessary for cows to be able to sight the dairy from all paddocks however the farms currently in operation in New Zealand are generally flat to rolling. As the land becomes steeper it is likely that more intervention will be required.

Is there a service provider within 2h of your farm and will they guarantee support within this time frame? Don't forget that AMS operate 24 hours a day and require 24 hour support.

Farm Dairy

Is your shed due for renewal? A conversion to AMS is capital intensive, have you got the most from your existing dairy?

Is the current site relatively central within the farm? The ideal location for an AMS dairy is near the middle of the farm so that walking distances are minimised, however the cost of installing services such as power will be higher the further from the road or current dairy.

Farm System

What farm system is best suited to automatic milking?

Dairy farms in New Zealand are classified as system 1 to 5 based on the level of bought feed (including grazing off) used and fertiliser applied. There are farms from every system operating AMS in New Zealand. In general the higher the level of imported feed the easier it should be to implement and get the full benefit of automatic milking and individual cow feeding, particularly if supplementary feed is offered at the dairy. All systems require good grazing management to encourage good cow flow and optimise pasture production and utilisation.

A small level of concentrate is generally required to maintain cow flow through the milking stations although there is one farm in New Zealand operating successfully with only grass and no feed in the AMS.

The DairyNZ research farm (Greenfield project) successfully operated within the criteria of a system 2 farm. Within conventional systems emphasis is on milk production per ha. This is equally applicable to automatic milking, however milk production per milking station is another very important performance indicator for system profit. The focus should be on optimising the utilisation of the automatic milking system, whichever farm system is operated.

How many milking stations do I need to milk my herd?

The most common automated milking systems milk one cow at a time but operate 24h/day. The number needed to milk a herd will depend on how often you want the cows to be milked, the peak yield of the herd and what level of utilisation of the milking stations can be achieved. Typical numbers of cows per AMS are 60 to 90.

Each milking has a fixed set-up time, so the aim is to increase the yield per milking by increasing the milking interval but not to the extent that per cow production is compromised.

Is a seasonal or split calving pattern more suited to AMS?

Both can work well in an AMS farm. While split calving better utilises the AMS through the year the decision should be based on economics and the profitability of winter milking needs to be carefully evaluated. Seasonal calving places additional pressure on the AMS about four weeks into calving. This is because of the washing time required between colostrum and mastitis cows. Plan the dairy layout so that colostrum cows can be drafted to a particular robot which avoids taking up time on the other machines.

Future Plans

Do you expect to increase herd size in the short to medium term?

Consider the AMS capacity and leave space for further robots in the dairy design. Remember as the herd gets larger the economics favour conventional milking as more cows can be milked in the same facility whereas more cows will usually require more robots on an AMS farm.

Farm Business

Will AMS maintain your system productivity?

The association between pasture utilisation and milk yield are important in both conventional and automatic milking, however the emphasis on the two within automatic milking has additional benefits to the system (i.e. cow flow). This means that an effective AM farm is a highly effective conventional farm. DairyNZ research has produced results from a low input system (2.5% of feed imported) that are equivalent to a ‘best practice’ conventional system.

Is the business strong enough to support the finance associated with AMS milking? 

For more information see:


In addition to the technical performance of the AMS and the design of the dairy and grazing system, a key factor in a successful AMS installation is the operator.

While it is important that the user is comfortable with technology and is not overwhelmed by hardware and software, it is essential that they are capable of taking a step back and trusting the technology. Frequent intervention and constant adjustment to the settings of the AMS and interfering with the cows will reduce attachment rates and overall performance.

It is essential the operator recognises the importance of regular maintenance and cleaning. It is also important that the operator recognises that while the AMS will harvest milk from the cows, the daily management of the herd is still required.

AMS is not a substitute for good farm management practices.

Consider these questions for yourself and potential staff:

  • Are you interested in computers and remote management?
  • Are you organised and flexible and willing to adapt working practises to cope with the different demands of AMS?
  • Are you capable of stepping back and leaving the system to 'learn' cow features?
  • Are you willing to implement a structured and organised approach to system hygiene and system maintenance?
  • Does technology excite or intimidate you?
  • How good are you at managing pasture? AMS farms require skilled grassland managers and any deficiencies will be exaggerated in an AMS environment.