Chipper fine tuning, i. e. the selection of suitable feedstocks and machine settings for comminution, might help to optimize wood chip production in terms of chip quality and energy efficiency. A total of 46 wood chip samples were produced with an electrically powered stationary drum chipper. Feedstocks derived from small diameter stem wood (Ø < 12 cm) of six different coniferous and broad-leaf tree species. Chipper settings varied in knife sharpness, screen mesh size and infeed-roller speed. Wood chip properties were determined following ISO standards for solid biofuels. Furthermore, image analysis allowed for highly detailed information on particle size and particle shape. Classification of wood chips followed ISO 17225-4. Throughput rate and energy consumption during chipping were related to volume and dry matter of the bulk material. Results indicate that chipping with narrow chipper screens reduced the share of coarse particles while chipping with blunt knives significantly increased the share of fine particles, the maximal particle length, the length to width ratio of particles and their particle shape factor. Specific electrical energy consumption during chipping strongly increased from approx. 4.2 kWh t⁻¹ (d. b.) up to 12.8 kWh t⁻¹ (d. b.) when blunt knives were applied. Overall, approx. 96% of all samples could be classified as “graded wood chips” according to ISO 17225-4 but only chipping with sharp knives and a narrow chipper screen (40 × 40 mm) allowed for the consequent production of high-quality wood chips of the particle size class P31s.

削片机微调，即为粉碎选择合适的原料和机器设置，可能有助于在木片质量和能源效率方面优化木片生产。使用电动固定鼓式削片机生产了总共 46 个木片样品。来自六种不同针叶树和阔叶树种的小直径茎木 (Ø < 12 cm) 的原料。削片机设置因刀锋利度、筛网尺寸和进料辊速度而异。根据固体生物燃料的 ISO 标准确定木片特性。此外，图像分析允许获得有关颗粒大小和颗粒形状的高度详细信息。木片的分类遵循 ISO 17225-4。切碎过程中的吞吐率和能耗与散装材料的体积和干物质有关。结果表明，用窄的削片机筛网削片减少了粗颗粒的份额，而用钝刀削片显着增加了细颗粒的份额、最大颗粒长度、颗粒的长宽比及其颗粒形状因子。切屑过程中的特定电能消耗从约 4.2 千瓦时吨^-1  (db) 高达 12.8 kWh t ^-1  (db) 当使用钝刀时。总的来说，大约。根据 ISO 17225-4，96% 的样品可归类为“分级木片”，但只有使用锋利的刀具和窄切片机筛网 (40 × 40 毫米) 才能随后生产出高质量的木片粒径等级 P31s。