"Stepover" refers to the offset distance of the endmill axis between one cutting pass and the next one, which also translates into how much new material is being removed by the endmill, or how much radial engagement is put on the endmill. The Carbide Compact Router has a diameter of 65mm and a speed range of 12k-30k RPM. Carbide3D Compact Router for Shapeoko Features a trim router for use with CNC machines Includes a 12 ft power cord Offers 12,000 - 30,000 RPM Comes with 2 sets of replacement brushes NOT compatible with the Shapeoko Z-plus 69mm (RB-Crb-92/93/97) It’s almost identical to the Makita 1-1/4inch router, which Carbide previously used with their Shapeoko machines before replacing it with their own version. If we wanted to be pedantic, the term chipload should be used for the case where there is no chip thinning, while the term chip thickness should be used to name the adjusted/effective chipload after chip thinning is taken into account. For the "narrow and deep" cut scenario (small WOC, large DOC), I like to use these guidelines: possibly even less for the hardest materials (e.g., 4% for steel). If you run it at too fast a feed rate with too slow RPMs, and you break the mill off due to excessive deflection. determine plungerate depending on the material. However, its backer pad required the use of messy glues and adhesives. Can someone measure the overall XXL height for me please? High RPMs induce lower cutting forces and generally provide better finish quality, but will also require higher associated feedrates to maintain a correct chipload: feeding faster can be a little scary at first, and leaves less time to react should anything go wrong. use a plungerate that is experimentally chosen, following the rule of thumb, 40% to 50% of the feedrate for plastics (plunging fast is required to avoid melting). round the corners...) or use an adaptive clearing toolpath that will take a lot of very shallow bites at the corners instead of a deep one. New Shapeoko 3 XXL Owner (Workflow Question). And this cutting force can then be compared with the Shapeoko's limit estimated (experimentally) to be around 20 lbf (9Kg). of cut will also come in the picture (more on this later). You will need to feed faster, and/or use an endmill with a lower flute count. For the "wide and shallow" cut scenario (large WOC, small DOC), I like to start in this ballpark: 5% to 10% of the endmill diameter for metals e.g. Have not used the lower speed settings, I seem to like the way it cuts on 4 and 5 with my 1/4 and 1/2 wide bits. Fly cutter) or any large square endmill, the intent is usually to shave off just a thin layer of material off the top surface, so one can feed quite fast. The Elaire Corporation makes 3/8" and 1/8" precision collets for both routers, which makes using micro end mills much easier. Let's say we decided to go for 16,000 RPM instead, the required feedrate would become: If going 144ipm still feels a little fast, it is possible to obtain the same chipload at lower RPM and lower feedrate, e.g. Variable speed control dial (10,000-30,000 RPM) to match the speed to the application Smooth rack-and-pinion fine depth adjustment system for more precise settings Quick-release cam lock system for convenient depth adjustments and base removal/installation Accepts industry standard template guides (I didn't have the correct size brass inserts on hand, so just drilled through the sole and used m5 hardware) We just posted our newest product, the Carbide Compact Router. A number of calculators have been implemented to address this, ranging from free Excel spreadsheets that basically implement the equations mentioned above, to full-fledged commercial software that embed material/tool databases, the most famous one probably being G-Wizard. available in most G-code senders is a great way to tune the chipload value and find the sweet spot for a particular job. The alternatives include avoiding straight corners in the design if possible (e.g. Where chip thinning really matters is for adaptive clearing toolpaths, that typically use small stepovers (more on this in the Toolpaths section). "Feeds" and "Speeds" go hand in hand, what really matters is the combination of feedrate and RPM values for a given situation. In so-called "conventional" milling, the direction of the endmill movement is such that the cutting edges bite from the inside to the outside of the material. I'm not sure if my order will come with the Makita mounting ring, or if I'll have to order one separately. select target RPM value (or alternatively SFM, then RPM will be derived from it). And finally, even if the cutting power is within the range of your router, there is still the matter of the. If you use the wrong end mill at too fast an RPM with too slow of a feed rate, and you get melted aluminum binding up on the end mill. So when all is said and done, climb milling wins on almost every aspect except deflection. While predefined recommendations for common endmills and materials are very useful, at some point it becomes impossible to produce feeds & speeds charts for every possible combination of factors, and also very tedious to compute everything manually. Say you are using a feedrate of 1000mm/min (39ipm), and a 3-flute endmill at 10,000RPM. Anyone have experience with getting a tool changer working? https://www.youtube.com/watch?v=5h8o2Id1iLE, https://www.shapeoko.com/wiki/index.php/Shapeoko_3#Videos, https://www.shapeoko.com/wiki/index.php/Materials#Aluminium, https://www.shapeoko.com/wiki/index.php/Spindle_Overview#Rotary_Spindle_Options, https://www.shapeoko.com/wiki/index.php/RT0701, Dewalt has finer-grained speed control, Makita lower and higher range of possible speeds (the lower speeds are especially useful on plastics and wood), Dewalt has multiple precision collet options (standard ones as well as the ER-style collets from Precise Bits), Makita has a single source for precision collets (albeit in a variety of sizes), Dewalt has lights, the Makita does not, Dewalt has a plastic button on the Body, which limits Z plane positioning inside the mount, Makita has a more Robust Tool changing mechanism, with a cylinder push lock below the shaft, which will allow more mounting options in the Z plane, Makita brush life longer and replacements less expensive and easier to change. for the same "thick-to-thin" reason, climb milling is a little more tolerant of less-than-perfectly-sharp endmills. The alternatives include avoiding straight corners in the design if possible (. Any mechanical mod of the machine also impacts the max chipload capability. This section should have highlighted that MANY factors influence the selection of adequate feeds & speeds & DOC & WOC settings. Where chip thinning really matters is for adaptive clearing toolpaths, that typically use small stepovers (more on this in the, should be used for the case where there is no chip thinning, while the term. The two usual router choices for the Shapeoko are the DeWalt DWP611 or the Makita RT0701C (US versions), I went with the Makita option and ordered the European version (RT0700C) locally: The dial on top of the makita (not visible on the picture) sets the rotation speed: Dial position 1 => 10,000 RPM; Dial position 2 => 12,000 RPM If you need to use .125" cutters in your Carbide Compact Router, these are for you. The following is an (arguable) table I am using as a personal reference, which I derived from analysis of a large number of feeds and speeds settings shared in the Shapeoko community, as well as my own experimentations. The Makita XTR01Z 18V LXT Brushless Compact Router is essentially the cordless version of the Makita RT0701CX3 1-1/4 hp compact router, except it has a brushless motor. However, that's true for even industrial grade machines. The Makita and DeWalt routers are rated at a max of 1.25HP (932Watts), but that is input power, and the power efficiency of a router is not very good (~50%), so the max actual power at the cutter is more likely around 450W. The interesting thing about the MRR figure is that it allows one to compare different combinations, and figure out which one is the most efficient (time-wise). The main reason is that the traditional way to determine feeds and speeds (especially when cutting metal) is to start from the required. My Shapeoko XXL came with a Makita trim router as its spindle. The Shapeoko 3 XXL from Carbide 3D is a large CNC router kit that is easy to assemble and use, making it the choice for us. (DOC) a.k.a. For example, a 1⁄2 "-diameter bit spinning at 10,000 rpm … In particular, for doing detailed work with small end mills (I've used 1/8" down to 1/64") the lower RPM is very helpful to dial in correct feed rates without breaking mills. Since its introduction, the Makita® GV5000 Sander has become one of the preferred tools for marble polishing applications. The numbers here are with the router running without a load. Aluminum spindle mounts for Makita RT0701c--- includes extra threaded holes for attaching accessories such as a pen. In the sketch below, imagine the blue triangle represents one cutting edge of the endmill. value (or alternatively SFM, then RPM will be derived from it).