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XtraBlatt Special 25 Years BiG Pack

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  • Krone
  • Bale
  • Bales
  • Baler
  • Straw
  • Balers
  • Throughput
  • Input
  • Density
  • Baling
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COMPARISON TEST in our

COMPARISON TEST in our test. A more intriguing factor is tractor input – a significant parameter that can account for the tractor guzzling quite a few litres more per hour. To measure the individual tractor inputs, we recorded the pto output that was necessary to either bale without cutting or cut and bale one tonne of straw. It turned out that all balers were more efficient on the maximum throughput test runs. The results are shown in the graph ‘Energy input compared’. According to this graph, the most input-efficient machine was the Krone XC without cutting system, requiring 1.6kWh per tonne of straw. This result corresponds to the relatively lower bale density on this machine. Yet, a higher bale density does not necessarily lead to a significant increase in specific consumption, which is demonstrated by the Krone HDP VC, where the input is as low as 1.9kWh/t. These rates increase when the cutting system is in action. It was 3kWh per tonne of straw on the Krone HDP VC with half the number of blades in action but only 2.3kWh on the Krone XC. Short cuts require a higher power input. This HOW ACCURATE ARE THE WEIGHING SYSTEMS? Abweichung Deviation (%) 6 5 4 3 2 1 4,4 MAXIMUM THROUGHPUT COMPARED 0 -0,3 Maximaler Maximum throughput Durchsatz (t/h) 60 Without Ohne Messer blades Mit With Messern blades 51 Messer blades 50 51,7 57,1 -1 A B Krone XC Krone VC Checking twelve bales from the Krone XC, we observed a small 0.3% deviation from the actual weight. C 40 30 20 10 0 A The average throughput of the Krone HDP VC as measured on three consecutive bales is more than 57t/hr. The Krone XC, too, is among the top throughput machines. HOW ACCURATELY IS BALE LENGTH MAINTAINED? A B C D Krone XC Krone HDP VC E B C Krone XC Krone HDP VC 2,02 2,09 2,16 2,09 2,13 2,19 1,75 1,80 1,85 1,90 1,95 2,00 2,05 2,10 2,15 2,20 2,25 Ballenlänge Bale length (m) The bale length varies between 10cm (including on the Krone VC) and 16cm on the various balers whereas it is 14cm on the Krone XC. D 45,8 46,5 E becomes clear when we look at the input rates of the machines with multiple-blade cutting system: here, the energy input was 0.5kWh higher (3.6kWh/tonne) than on the machines with a standard cutting system. What does this mean in terms of your fuel bill? Let’s see: 0.5kWh/t is the equivalent of approx. 0.15 litres of fuel per tonne of straw. Assuming the throughput is 40t/ hr, the tractor would guzzle about 6 litres extra every hour and even about 20 litres extra in comparison with a machine without a cutting system. But let’s go back to the tractor: our measurements reveal that, at maximum throughput rates, the balers have a pto input of about 200kW/272hp. Add to this the power the tractor needs just to pull the 12t baler, and it becomes clear that the tractor should have at least a 300kW/400hp engine if you really want to utilise such a high-capacity baler to potential – especially on hilly fields and even with the pre-chopper in action. On the other hand, in conditions where throughputs are low, it is of course no problem to use a 200hp tractor. This takes us to maximum throughputs. We asked the operators to exercise their machine to the point at which it was likely to block up, which the Krone operator also managed to do, producing a blockage in the intake system. The graph ‘Maximum throughput compared’ shows the throughput figures that were averaged from three consecutive bales. The highest throughput on the ‘no blades’ run was measured on the Krone HDP VC, and this was 51.7t/ hr. The Krone XC was also among the machines with a better than 50t/hr performance 3424 profi 11 - 2018

(51.7t/hr). The throughput on all balers drops (more or less) when the knives are at work. The Krone XC still managed to put out 45.8t/hr. By comparison, the throughput of just 38.6t/hr by the Krone HDP VC with half the number of blades in action was obviously down to the low-yielding swath – especially as this 51-blade baler again achieved an excellent throughput of 46.5t/hr. HOW THE MEASUREMENTS WERE TAKEN The last test parameter was bale length and how accurately the set length was maintained by the individual machines (see the graph ‘How accurately is bale length maintained?’). The Krone HDP VC came out as one of the best in this category, with the deviation from the target length being as small as 10cm, whereas it was 14cm on the Krone XC. To check on the accuracy of the weighing systems, we compared the actual bale weight with the set target weight (see graph ‘How accurate are the weighing systems?’). In this category, the weighing system in the roller chute on the Krone XC proved to be among the most accurate systems, showing a sensationally small deviation of 0.3% across twelve bales. Yet the system on the Krone HDP VC had issues with the 2m bales, failing to indicate any weight at all for 25% of the bales and producing a 4.4% inaccuracy, which is rather large. The test site was a 65ha field of wheat, which had been combined by a hybrid Claas Lexion 600 with a 9m header one week before the test took place. The crop yielded more than 7.5t/ha of grain and 4t/ha straw. Consequently, the swath size was about 3.5kg/m. After some rainfall, the swath was turned over once by a side delivery rake. On the day the test took place, the residual moisture percentages ranged between 9.0% and 10.3% which were measured between the times of 12:30 and 17:30. All balers had GNK Walterscheid torque measuring hubs that were installed Bernd Carstensen and Tobias Konietzny from GKN Walterscheid measured the tractor input with torque hubs. more swaths at maximum ground speed, once using the cutting system, once not using the cutting system and produce the maximum density. Then the measurements and weights were taken from three bales from each run. In addition, we took 25l samples with a penetrometer from all chopped bales. The samples were later sieved into fractions at the DLG test centre to determine the quality of cut. Of course, we also measured the dimensions and weights of the balers, the actual pick-up widths and blade spacings in the cutting system. Summary: This comparison was a premiere that saw the big balers of all manufacturers work the same field on the same day to compare their performance. The regular specification Krone BigPack 1290 XC achieved very good throughputs but performed less well on quality of cut. The accuracy of the weighing system was very good. The Krone BigPack 1290 HDP VC put in a convincing performance, achieving a high density, high throughput and a very good quality of cut. The input requirement is average; the weighing system did not work accurately. In this article we discussed the actual test results. In a follow-up article, we will look at the specific machine details, including dimensions and weights, ease of changing knives and prices. The bale density was determined by measuring and weighing the bales. before the tests began, and a proximity sensor inside the needle yoke measured the accurate baling time for each bale. The actual ground speed was measured by a GPS mouse. The operators drew lots to decide the starting order and began picking up four of the approximately 1,000m-long swaths. The instructions were easy: travel down the swath at 12km/hr, once using the cutting system, once not using the cutting system, but always try to produce the maximum density. Next, do two We used a penetrometer to sample the straw and determine the cutting quality... ....and then fractioned it at the DLG test centre. profi 11 - 2018 25 35