{"id":1096,"date":"2017-01-10T16:43:03","date_gmt":"2017-01-10T16:43:03","guid":{"rendered":"http:\/\/blogs.napier.ac.uk\/cwst\/?p=1096"},"modified":"2025-10-31T13:56:44","modified_gmt":"2025-10-31T13:56:44","slug":"grading-machines-speeds","status":"publish","type":"post","link":"https:\/\/blogs.napier.ac.uk\/cwst\/grading-machines-speeds\/","title":{"rendered":"Grading machines and their speeds"},"content":{"rendered":"

Edit 23.07.2023: a citable list of these machine details, correct to date can be found in https:\/\/doi.org\/10.1080\/20426445.2022.2050549<\/a>.
Edit: 02.05.2024: new machines are included in the addendum to that paper, here<\/a>, underneath a list of the very latest settings tables (AGR\/ITT) for all the machines.<\/p>\r\n

The strength grading of timber by machine has seen many technological developments in the last few years. \u00a0The first type of machine, developed back in the 1960s, worked by physically bending the timber in order to assess the stiffness, and thereby estimate the strength (not a proof loading test!), but these days there a several other ways it is done.<\/p>\r\n

In this post, we will look at the machines approved for machine controlled strength grading of timber in Europe, with some quick comments on their mode of operation and maximum operating speed. \u00a0We will cover them in order in which they are listed by CEN TC124 WG2 TG1<\/a> (approximate order of development). \u00a0This is for guidance only – please contact the machine manufacturer or your Notified\/Approved Body for proper information.\u00a0 (You may like to know there is a list of machines approved by the American Lumber Standard Committee here<\/a>)<\/p>\r\n

1. Cook Bolinders<\/strong>
Tecmach Ltd<\/a>, Sanderson Centre, Lees Lane, Gosport,\u00a0Hants. PO12 3UL
Mechanical bending type machine (minor axis)\u00a0[mechanical stiffness]
Maximum feed speed 100-150 m\/min<\/p>\r\n

2.\u00a0Computermatic Micromatic
<\/strong>Measuring and Process Control Ltd<\/a>,\u00a0Unit 2,\u00a0Tabrums Industrial Estate,\u00a0Battlesbridge,\u00a0Essex,\u00a0England SS11 7QX
Mechanical bending type machine (minor axis)\u00a0[mechanical stiffness]
Maximum feed speed 105 m\/min<\/p>\r\n

3. Raute Timbergrader<\/strong>
VTT<\/a>, P.O.Box 1000, FI-02044 VTT, Finland
Mechanical bending type machine (minor axis) [mechanical stiffness]
Maximum feed speed 48-124 m\/min<\/p>\r\n

4. EuroGrecomat-702<\/strong>
MiCROTEC S.p.A.<\/a>, Julius-Durst 98, 39042 Bressanone (BZ), Italy
X-ray type machine\u00a0[density, size and position of knots]
Maximum feed speed \u00a080-300 m\/min<\/p>\r\n

5. Goldeneye 702 (GoldenEye-702) \/ Goldeneye 802<\/strong>
MiCROTEC S.p.A.<\/a>, Julius-Durst 98, 39042 Bressanone (BZ), Italy
X-ray type machine\u00a0[density, size and position of knots]
702: Maximum feed speed \u00a0450 m\/min (and able to do board splitting)
802: Maximum feed speed \u00a01200 m\/min (and able to do board splitting)<\/p>\r\n

6. EuroGrecomat-704<\/strong>
MiCROTEC S.p.A.<\/a>, Julius-Durst 98, 39042 Bressanone (BZ), Italy
X-ray type machine\u00a0[density, size and position of knots]\u00a0combined with
Mechanical bending type machine (minor axis)\u00a0[mechanical stiffness]
Maximum feed speed 80-120 m\/min<\/p>\r\n

7. Dynagrade<\/strong>
LIMAB AB<\/a>, Almedalsv\u00e4gen 15, 412 63 G\u00f6teborg, Sweden
Acoustic\u00a0type machine (longitudinal resonance) [dynamic stiffness, without density]
Maximum feed speed \u00a0100-240 pieces\/min<\/p>\r\n

8. Viscan (ViSCAN)<\/strong>
MiCROTEC S.p.A.<\/a>, Julius-Durst 98, 39042 Bressanone (BZ), Italy
Acoustic\u00a0type machine (longitudinal resonance) [dynamic stiffness, without density]
Maximum feed speed \u00a0180 pieces\/min<\/p>\r\n

9. EuroGrecomat-706<\/strong>
MiCROTEC S.p.A.<\/a>, Julius-Durst 98, 39042 Bressanone (BZ), Italy
X-ray type machine\u00a0[density, size and position of knots]\u00a0combined with
Acoustic\u00a0type machine (longitudinal resonance) [dynamic stiffness]
Maximum feed speed 150 pieces\/min (acoustic) and 80-300 m\/min (xray)<\/p>\r\n

10. Goldeneye 706 (GoldenEye-706) \/ Goldeneye 806<\/strong>
MiCROTEC S.p.A.<\/a>, Julius-Durst 98, 39042 Bressanone (BZ), Italy
X-ray type machine\u00a0[density, size and position of knots]\u00a0combined with
Acoustic\u00a0type machine (longitudinal resonance) [dynamic stiffness]\u00a0(a\u00a0Viscan)
Maximum feed speed 180 pieces\/min (acoustic) and 450 m\/min (xray, 706 version) or 1200 m\/min (xray, 806 version) (and able to do board splitting)<\/p>\r\n

11. MTG 960<\/strong> (MTG with balance)
Brookhuis Applied Technologies BV<\/a>, Twentepoort West 17, 7609 RD Almelo, The Netherlands
A handheld portable grading machine (and weighing scales)
Acoustic\u00a0type machine (longitudinal resonance) [dynamic stiffness with density]
Maximum feed speed\u00a0not stated (manual operation)<\/p>\r\n

12. Precigrader<\/strong>
LIMAB AB<\/a>, Almedalsv\u00e4gen 15, 412 63 G\u00f6teborg, Sweden
Acoustic\u00a0type machine (longitudinal resonance) [dynamic stiffness with density]
Maximum feed speed \u00a0180 pieces\/min<\/p>\r\n

13.\u00a0Grademaster<\/strong>
Dimter GmbH Maschinenfabrik,<\/a>\u00a0Illertissen, Germany
Acoustic\u00a0type machine (longitudinal resonance) [dynamic stiffness with density combined with
Optical scanner for knot measurements]
Maximum feed speed \u00a025 pieces\/min and 180 m\/min<\/p>\r\n

14. Escan FWM\/FW <\/strong>and mtgESCAN 962\/966<\/strong>
Luxscan technologies<\/a>, Z.A.R.E Ouest, L-4384 Ehlerange, Luxembourg
Brookhuis Applied Technologies BV<\/a>, Twentepoort West 17, 7609 RD Almelo, The Netherlands
Acoustic\u00a0type machine (longitudinal resonance) [dynamic stiffness with density]
Maximum feed speed \u00a0180 pieces\/min<\/p>\r\n

15. Triomatic<\/strong>
CBS (Concept Bois Structure SARL)<\/a>, 4 Rue des Longs Champs, 25140 Les \u00c9corces, France
Acoustic\u00a0type machine (ultrasonic time of flight, and pin indentation density)\u00a0[dynamic stiffness with density]
Maximum feed speed \u00a030-40 pieces\/min<\/p>\r\n

16. CRP<\/strong>
Automatisation J.R.T Inc<\/a>, 405 avenue Galil\u00e9e, Quebec, Canada
Mechanical bending type machine (minor axis)\u00a0[mechanical stiffness]
Maximum feed speed \u00a0250 m\/min<\/p>\r\n

17. Xyloclass T<\/strong>
XYLOMECA<\/a>, 41 rue Michel Montaigne, 24700 Moulan Neuf, France
Acoustic\u00a0type machine (longitudinal resonance) [dynamic stiffness with density]
Maximum feed speed \u00a050 pieces\/min<\/p>\r\n

18. Noesys<\/strong>
SARL Esteves, Zone artisanale, Route du Malzieu, 48200 Saint chely d’Apcher, France
Acoustic\u00a0type machine (edgewise flexural resonance) [dynamic stiffness with density]
Maximum feed speed \u00a04 pieces\/min<\/p>\r\n

19. MTG 920<\/strong> (MTG without balance)
Brookhuis Applied Technologies BV<\/a>, Institutenweg 15, 7521 PH Enschede, The Netherlands
A handheld portable grading machine
Acoustic\u00a0type machine (longitudinal resonance)\u00a0 [dynamic stiffness without density]
Maximum feed speed\u00a0not stated (manual operation)<\/p>\r\n

20. Viscan Plus (ViSCAN-PLUS)<\/strong>
MiCROTEC S.p.A.<\/a>, Julius-Durst 98, 39042 Bressanone (BZ), Italy
Acoustic\u00a0type machine (longitudinal resonance)\u00a0 [dynamic stiffness with density]
Maximum feed speed 180 pieces\/min<\/p>\r\n

21. Xyloclass F<\/strong>
XYLOMECA<\/a>, 41 rue Michel Montaigne, 24700 Moulan Neuf, France
Acoustic type machine (flexural resonance) [dynamic stiffness with density]
Maximum feed speed 20 pieces\/min<\/p>\r\n

22. Viscan Compact (ViSCAN-COMPACT)<\/strong>
MiCROTEC S.p,A<\/a>, Julius-Durst 98, 39042 Bressanone (BZ), Italy
Acoustic\u00a0type machine (longitudinal resonance)\u00a0 [dynamic stiffness with density]
Maximum feed speed 35 pieces\/min
Maximum feed speed of high speed version (HSV) is 80 pieces\/min<\/p>\r\n

23. MTGbatch 962\/966 <\/strong>(with balance)
Brookhuis Applied Technologies BV<\/a>, Twentepoort West 17, 7609 RD Almelo, The Netherlands
Acoustic\u00a0type machine (longitudinal resonance)\u00a0 [dynamic stiffness with density]
Maximum feed speed 30 pieces\/min<\/p>\r\n

24. MTGbatch 922\/926<\/strong> (without balance)
Brookhuis Applied Technologies BV<\/a>, Twentepoort West 17, 7609 RD Almelo, The Netherlands
Acoustic\u00a0type machine (longitudinal resonance)\u00a0 [dynamic stiffness without density]
Maximum feed speed 30 pieces\/min<\/p>\r\n

25. Rosgrade<\/strong>
Ros\u00e9ns Vision AB<\/a>, Hulda Mellgrens gata 2, 421 32 V\u00e4stra Fr\u00f6lunda, Sweden
Acoustic type machine (longitudinal resonance) [dynamic stiffness without density]
Maximum feed speed 100 pieces\/min<\/p>\r\n

26. EScan FM\/F <\/strong>and mtgESCAN 922\/926<\/strong>
Luxscan technologies<\/a>, Z.A.R.E Ouest, L-4384 Ehlerange, Luxembourg
Brookhuis Applied Technologies BV<\/a>, Twentepoort West 17, 7609 RD Almelo, The Netherlands
Acoustic\u00a0type machine (longitudinal resonance)\u00a0 [dynamic stiffness]
Maximum feed speed 180 pieces\/min<\/p>\r\n

27. E-CONTROL model AC<\/strong>
Innodura<\/a>, 11 avenue Albert Einstein, 69 100 Villeurbanne, France
Acoustic\u00a0type machine (longitudinal resonance)\u00a0 [dynamic stiffness with density]
Maximum feed speed 80 pieces\/min (10 pieces\/min for semi-automatic version)<\/p>\r\n

28. Rosgrade plus<\/strong>
Ros\u00e9n & Co Maskin AB<\/a>, 531 94 Lovene, Sweden
Acoustic\u00a0type machine (longitudinal resonance)\u00a0 [dynamic stiffness with density]
Maximum feed speed 100 pieces\/min<\/p>\r\n

29. Viscan portable WITH balance \u00a0(ViSCAN-portable_WITH_balance)<\/strong>
MiCROTEC S.p.A.<\/a>, Julius-Durst 98, 39042 Bressanone (BZ), Italy
A portable grading machine
Acoustic\u00a0type machine (longitudinal resonance)\u00a0 [dynamic stiffness with density]
Maximum feed speed\u00a0not stated (manual operation)<\/p>\r\n

30. Viscan portable WITHOUT balance (ViSCAN-portable_WITHOUT_balance)<\/strong>
MiCROTEC S.p.A.<\/a>, Julius-Durst 98, 39042 Bressanone (BZ), Italy
A portable grading machine
Acoustic\u00a0type machine (longitudinal resonance)\u00a0 [dynamic stiffness without density]
Maximum feed speed\u00a0not stated (manual operation)<\/p>\r\n

31. WoodEye Strength Grader<\/strong>
Microtec AB<\/a>\u00a0(Microtec Link\u00f6ping), Id\u00f6gatan 10, 582 78 Link\u00f6ping, Sweden
Acoustic\u00a0type machine (longitudinal resonance)\u00a0 [dynamic stiffness with density] combined with
Laser tracheid effect type machine [slope of grain]
Maximum feed speed 180 pieces\/min and\u00a0450 m\/min<\/p>\r\n

32. RS Strength Grader<\/strong>
RemaSawco AB<\/a>, Snickaregatan 40, 582 26 Link\u00f6ping, Sweden
Laser tracheid effect type machine [slope of grain]
Maximum feed speed 75 m\/min<\/p>\r\n

33. LuxScan OptiStrength XE
<\/strong>Luxscan technologies<\/a>, Z.A.R.E Ouest, L-4384 Ehlerange, Luxembourg
X-ray type machine\u00a0[density, size and position of knots]\u00a0combined with
Acoustic\u00a0type machine (longitudinal resonance) [dynamic stiffness] (an EScan F)
Maximum feed speed\u00a0180 pieces\/min (acoustic) 240\u00a0m\/min (xray)<\/p>\r\n

34. LuxScan OptiStrength X
<\/strong>Luxscan technologies<\/a>, Z.A.R.E Ouest, L-4384 Ehlerange, Luxembourg
X-ray type machine\u00a0[density, size and position of knots]
Maximum feed speed\u00a0240 m\/min<\/p>\r\n

35. STIG<\/strong> (strength timber grading machine for Slovenian spruce)
ILKON – In\u0161titut za les in konstrukcije<\/a>, Ulica Nadgori\u0161kih borcev 43, 1231 Ljubljana-\u010crnu\u010de, Slovenia
A portable grading machine
Acoustic\u00a0type machine (longitudinal resonance)\u00a0 [dynamic stiffness without density]
Maximum speed\u00a010 seconds per piece (manual operation)<\/p>\r\n

36. Finscan Nova<\/strong> (Boardmaster Nova)
Microtec Innovating Wood Oy<\/a> (Microtec Espoo), Klovinpellontie 1-3, FI-02180 Espoo, Finland
Camera scanning (visual and near infrared) [knots, slope of grain, and other visual features]. Mirrors are used for edge scanning.
Maximum speed 200 pieces\/minute<\/p>\r\n

37. Finscan HD<\/strong> (Boardmaster HD)
Microtec Innovating Wood Oy<\/a> (Microtec Espoo), Klovinpellontie 1-3, FI-02180 Espoo, Finland
Camera scanning (visual) [knots, slope of grain, and other visual features]. All four sides are scanned directly.
Maximum speed 130 pieces\/minute<\/p>\r\n

38. MODULO<\/strong>
M. Manfred Hudel, 601 rue de Calonne, 62350 Saint Floris, France
Mechanical bending type machine (minor axis) [mechanical stiffness]
Semi automatic operation with special instructions for multiple measurements depending on length<\/p>\r\n

39. RS Strength Grader Density<\/strong>
RemaSawco AB<\/a>, Snickaregatan 40, 582 26 Link\u00f6ping, Sweden
Laser tracheid effect type machine [slope of grain] with [density]
Maximum feed speed 65 m\/min<\/p>\r\n

40. Goldeneye 901<\/strong>
MiCROTEC S.p.A.<\/a>, Julius-Durst 98, 39042 Bressanone (BZ), Italy
Laser tracheid effect type machine [slope of grain]
Maximum feed speed 160 pieces\/min<\/p>\r\n

41. Goldeneye 902<\/strong>
MiCROTEC S.p.A.<\/a>, Julius-Durst 98, 39042 Bressanone (BZ), Italy
Laser tracheid effect type machine [slope of grain] combined with [density] from x-ray
Maximum feed speed 160 pieces\/min<\/p>\r\n

42. Goldeneye 906<\/strong>
MiCROTEC S.p.A.<\/a>, Julius-Durst 98, 39042 Bressanone (BZ), Italy
Laser tracheid effect type machine [slope of grain] combined with
Acoustic type machine (longitudinal resonance) [dynamic stiffness] (a Viscan) with [density] from x-ray
Maximum feed speed 160 pieces\/min<\/p>\r\n

43. Denscan<\/strong>
MiCROTEC S.p.A.<\/a>, Julius-Durst 98, 39042 Bressanone (BZ), Italy
X-ray measurement of [density] like a Viscan Plus without resonance measurement.
Maximum feed speed 180 pieces\/min<\/p>\r\n

44. Finnos Board Scanner<\/strong>
Finnos Oy<\/a>, Tukkikatu 5, FI-53900 Lappeenranta, Finland
Camera scanning (visual) [knots and other visual features], with mirrors for edge scanning.
Maximum feed speed 130 pieces\/min<\/p>\r\n

45. Finscan 901<\/strong>
MiCROTEC S.p.A.<\/a>, Julius-Durst 98, 39042 Bressanone (BZ), Italy
Camera scanning (visual) [knots]
Maximum feed speed 100 pieces\/min<\/p>\r\n

Some of these machines have many available settings – covering different species, different growth regions and different grade combinations. \u00a0Some have only a few settings.\u00a0 Some machines are no longer manufactured.<\/p>\r\n

There are other types of grading machines around the world, some in use in Europe for output control grading (which, unlike machine control, does not require all machines of the same type, to operate with identical performance).<\/p>\r\n

Visual strength grading is done differently – although the underlying principle and standardisation framework is the same under the European system<\/a>. \u00a0Machines can be used to do visual strength grading – in which case this is still visual grading and not machine grading. There is an increasingly blurred line though – as machines can be used to measure “machine grading” type parameters (such as density) to combine with visual grading.<\/p>\r\n

Version history:<\/p>\r\n

Update 23\/1\/2017: Thanks to Martin Bacher for letting us know about machine #13. This missing machine is now added.
Update 31\/1\/2017: Some more corrections for machine #13 with thanks to Martin Bacher
Update 15\/10\/2017: Added machines 33 and 34\u00a0(approved at the TG1 meeting 10\/11 Oct 2017)
Update 25 & 28\/11\/2017: Corrected the feed speeds for machines 33 and 34
Update 26\/11\/2017: Added the feed speed for the HSV version of Viscan Compact (approved at the TG1 meeting\u00a010\/11 Oct 2017)
Update 5\/4\/2018: Added machine 35 (approved at the TG1 meeting 4\/5 Apr 2018)
Update 8\/11\/2018: Corrected the name of Cook-Bolinders (which is currently wrong in the ITTs), and updated the manufacturer address, and corrected the manufacturer for the Computermatic Micromatic
Update 14\/11\/2018: Added hyperlinks to manufacturer websites
Update 15\/5\/2019: Added machine 36 (approved at the TG1 meeting 19\/20 March 2019)
Update 22\/10\/2019: Added machine 37 (approved at the TG1 meeting 1\/2 October 2019) and increased the maximum feed speed of the Nova version (machine 36).
Update 1\/11\/2019: Corrected the information about the Boardmaster HD
Update 15\/11\/2019: Updated the machine manufacturer information for the Rosgrade
Update 16\/11\/2020: Added machine 38 (approved following the TG1 meeting May 2020). And corrected the RS Strength grader max speed to the metres per minute version (approved following the TG1 meeting September 2017).
Update 6\/5\/2021, included the new names for the FinScan machines and EScan variants
Update 26\/11\/2021 FinScan Oy changed to Microtec Innovating Wood Oy (also known as Microtec Espoo) and address updated. The faster versions of Goldeneye (802 and 806) are added.\u00a0 The new machine (number 39), RS-Strength Grader Density added (approved at the TG1 meeting 16 November 2021).
Update 28\/11\/2021: Updated the introduction text and added a link to the ALSC website.
Update 29\/11\/2021: WoodEye manufacturer information updated.
Update 02\/05\/2024: Three new machines have been approved and added. A higher feed speed has also been approved for the Goldeneye 802 and 806
Update 22\/12\/2024: Two new grading machines have been approved and added (MiCROTEC Denscan and Finnos Board Scanner).
Update 06\/07\/2025: MiCROTEC changed from Srl \/ GmbH to S.p.A.
Update 06\/07\/2025: Dynalyse AB changed to Limab AB with new address.\u00a0
Update 06\/07\/2025: A new machine was approved at the TG1 meeting in May 2025, the Finscan 901.
Update 14\/07\/2025: New address for Brookhuis Applied Technnologies BV.<\/p>\r\n\r\n

 <\/p>\r\n","protected":false},"excerpt":{"rendered":"

Edit 23.07.2023: a citable list of these machine details, correct to date can be found in https:\/\/doi.org\/10.1080\/20426445.2022.2050549.Edit: 02.05.2024: new machines are included in the addendum […]<\/a><\/p>\n<\/div>","protected":false},"author":57,"featured_media":3645,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_crdt_document":"","jetpack_post_was_ever_published":false,"footnotes":""},"categories":[5],"tags":[9,19,20,56],"class_list":["post-1096","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-standards","tag-en14081","tag-machine-grading","tag-strength-grading","tag-timber-grading"],"yoast_head":"\nGrading machines and their speeds - Centre for Wood Science & Technology<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blogs.napier.ac.uk\/cwst\/grading-machines-speeds\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Grading machines and their speeds - 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