在室内工作的机器控制，由Leica Geosystems的两个总站指导bob apple

Author & Photographer: Arne Forsell

Impressive…very impressive…!

This is the first word that enters your mind when you see the enormous building emerging from behind the forest. The Swedish wholesale company Dagab’s new logistic centre for groceries in the city of Bålsta 50 kilometers northwest of Stockholm, will become one of North Europe’s largest buildings. With a length of 575 m and a floor area of 100,000 m2, which is the equivalent of 15 football stadiums and a ceiling height of 15 meters, storage rooms with different temperature zones, the building is constructed with a strong focus environment.

Dagab can close down six existing facilities and move their activities to Bålsta when the project is completed in 2023.

Using machine control for creating one of North of Europe’s largest buildings

建设公司卡纳纳登is responsible for the earthmoving works – a project that involves ground stabilisation and piling. Kanonaden has gathered a well-oiled clockwork of subcontractors to ensure smooth and timely execution of the workflow. Two of these indispensable, sharp, and distinct gears of the clockwork are Dennis Larsson and Simon Sundkvist. Dennis drives a skid steer machine and levels the final layer in a forest of pegs on one side of one of the storage rooms. 33-year old Dennis works as the third generation in the family-owned Sanna Gräv AB. His green-yellow safety vest and his black T-shirt reveal that he works for Sanna Gräv – if anybody should ever doubt that!

Soil sanitation, sewage systems, surface geothermal heat and even archaeological excavations, adjustment of asphalt and concrete are some of the activities that the company has focused on since the beginning of 1973. The customers are mainly larger companies in the area of Mälardalen. The machine fleet includes, besides the skid steer, tire tractors, excavators, and dumpers.

使用Skid转向进行精细分级

Dennis' career in the heavy construction industry started with a summer job at the age of 13, so it is a very experienced machine operator that operates the CAT299D2 for fine grading of the final surface layer of the future warehouse.

某些人会称之为奇怪而难以描述的机器的混合动力车被丹尼斯在混凝土基础之间的狭窄空间中安全地操纵。机器下方的刀片将填充材料拖动到用于后续楼层基础的最后一层中，并以坚定的精度将其沉积。丹尼斯（Dennis）证明，在机器内的操纵杆后面，他是一位真正的艺术家。

Dennis is assisted by his machine control solution from Leica Geosystems.

- We have machine control from Leica Geosystems on all of our machines, says Dennis.
- 我们只想使用最好的工作，因此我们在MCP80面板上使用MC1软件。我们的客户和我们对此感到非常满意，我不希望其他系统！

The work under the massive roof and between the obstructing piles has created new challenges for Dennis and the handling of his machine.

- 当我在屋顶下工作时，使用双TPS是有利的，因为表面具有许多不同的高度，因此必须确切知道高度差异是什么。多亏了两个ICR80总站，我永远不必考虑移动机器bob apple，因为它们一直在跟踪机器。与仅使用一个TPS和跨斜率函数相比，这有很大的不同。由于所有阻止事物，我都无法一直使用总站。他说，然后我改用激光溶液。

Dennis轻松从双TPS切换到双激光溶液

- 但这没关系。当高度恒定的情况下，结果几乎相同。我以5毫米的边距为上或向下开车，没有任何问题。我可以自己做一切！我放置了总站，自己做工作bob apple！当我工作bob apple时，总站给我带来了安全感。只要模型正确，就可以正确执行作业。

Dennis Larsson claims that he sometimes finds it hard to learn new technology, but he immediately realises:

- 我已经学会了使用GPS，当您看到高度时，工作变得更加有趣。可能是年轻人在机器上一直使用GPS的年轻人没有像我一样的快乐，但是我从事这项业务已经很长时间了……学习MC1绝对不是问题！

Machine control is used for high precision excavation

在另一个巨大的仓库的一部分,西蒙Sundkvist works in his Volvo EW160E signed Granlunds Grävmaskiner. The company started in 2001 when Andreas Granlund bought an excavator for his one-person company and stating that “the rest is history” is a bit of a cliché, but also true underlined by the fact that the company today has 45 employees and machines for construction work, earthmoving, and transportation.

Simon Sundkvist worked initially as a truck driver, but his uncle had worked as an excavator operator for about 50 years and inspired him to switch career 8 years ago.

- I took a GNSS course offered by Leica Geosystems and thought that machine control was cool and interesting, and that was that he says and laughs through the beard. I have continued with it, adjusted it a little, and learned more and more, and the Leica systems are easy to use.

The almost cathedral-like environment that Simon and his excavator work in with the smooth, bright concrete walls that lead the gaze upwards towards the ceiling creates almost total radio shadow. In his work with floor area Simon is guided by the two total stations that catch the prisms on his machine with unfailing accuracy and help him place the bucket with the exact tilt and correct height.

On one of the short sides of the area that he is working on, he has dug several holes to give room for future installations in the room. Beautiful, sharp-cut edges, holes with millimeter tolerances, and razor-sharp angles are a silent testimony about the accuracy of the machine control solution – when it is performed by a competent machine operator.

The solution allows Simon to work independently. He rarely needs help from surveying engineers for stake-out, and the job is a lot more efficient and cost-effective.

- I start every day by positioning the two iCR80 total stations. I did it very thoroughly in the beginning, but that didn’t work. It was too accurate for the machine control solution. Vibrations and even the air pressure level in the machine’s tires were enough to influence the machine control, and it didn’t function. Now, I only use two decimals, and it works a lot better.

Simon thinks that it saves a lot of time because he now works independently.

- It is a question of hours, he says. And it is nice to work autonomously as well.

他只有在描述他与Leica Geosystems的关系时才受到赞扬。

- If I need something, I have a direct phone number of people at Leica. It works really well!

测量经理Jerker Wretmanfully trusts the accuracy of the machine control solutions

海关检查员Wretman是测量经理company Kanonaden Mälardalen, which is the department that takes over the project from the mother company Kanonaden. He has been with the company since 2017 and is one of 80 employees. Jerker says that Dagab logistics center is the largest project that the company has worked on until now. Still, he feels safe in the role despite the size of the project and specific challenges with the height differences on the site and the very tight deadlines.

测量经理Jerker Wretman

- Having the machine control solution from Leica Geosystems is of great value to us. I trust it fully, and the fact that we don’t need to call for surveying engineers makes the process a lot faster and more efficient. The result is highly accurate regardless of using total stations or lasers.

Bålsta的Dagab项目是为未来建立的项目。从这里开始，杂货将交付到几家杂货店连锁店。该存储空间还用于在杂货的未来分布中处理电子商务。

It is an impressive location, and machine control from Leica Geosystems has played an essential role in its construction!