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Linear rail 3d printer kit
Linear Rails - 3D Distributed
MGN12-H Linear RailAre linear rails better?Linear rails produce a high degree of accuracy and stability compared to round rods with linear bearings. They have better mounting, and smoother motion which improves print quality and machine reliability.
What are linear rails used for?Linear rails are used in different applications in industrial machine and motion system design. Linear Rails are designed to support the movement and load of a mechanical motion system.
Linear rails are used in different applications. Different levels of stiffness in different directions can have stresses on a given plane, or in some cases you may want the rail to slightly flex in one plane opposed to the other.
- Placing the surfaces for the rollers strategically, for example in a location that is unlikely to get contaminated, or where the maximum force will be applied.
- Curved paths, so that the carriage can move along a line that is not straight.
Accuracy of Linear Rails
Linear rails provide a high level of accuracy and stability compared to round rods with linear bearings or other methods.
Linear Rail Applications
Linear rails are used in different applications.
Different levels of stiffness in different directions can have stresses on a given plane, or in some cases you may want the rail to slightly flex in one plane opposed to the other.
Curved paths, so that the carriage can move along a line that is not straight.
Linear Rail Alignment
Linear Rail Alignment- Make sure the linear rails are parallel to each other to prevent binding.
- Check for flatness and alignment of the paired sets of rails.
- Check the perpendicularity to the mid-plane between the two rails.
- Make sure the linear rails are parallel to each other to prevent binding. Check for flatness and alignment of the paired sets of rails.
- Check that the gantry is perpendicular to the mid-plane between the two rails. If the gantry becomes over constrained it will cause the stepper motor to skip steps.
- Check the Z-axis lead screws aligned and concentric to the stepper motor shafts. If not, mechanical binding may occur. The gantry can’t really tilt, so the linear rails could be damaged over time. It’s important to not over constrain the z-axis, because it can cause z banding.
Mounting Linear Rails
Linear Rail AlignmentLinear rails can be mounted along the full length of the rail, rather than the specific area of motion, thus increasing the accuracy of their positioning and rigidity.
The contact surface between the rollers and the bearings is flat, cylinders can be used instead of spheres. This minimizes mechanical stresses, and the amount of play within the system. This increases mechanical longevity and allows for increased bearing load. The bearings only allow for one degree of movement.
The contact surface between the rollers and the bearings is flat, cylinders can be used instead of spheres. This in turns diminishes the mechanical stresses, and the amount of play, increases longevity and allows for more bearing capacity, among others. Linear rails can be anchored along their full length to aluminum extrusion profiles, thus increasing the accuracy of their positioning, stiffness and their bearing capacity.
Rail Parallelism
The parallelism of the linear rails or linear guide system is key for proper movement of a motion system. As the number of rails and carriage blocks used within a system increases the more important it is to ensure the rails used are parallel.
Unnecessary load can result if the the linear rails or linear guide are not parallel within a manufacturer’s specified parallelism tolerance.
The bearings on a linear rail provide proper constraint of movement. There must be two rods with linear bearings to provide the same results of linear rails.
Light Weight Linear Rails
Light Weight Linear RailsLinear Rails BearingsWhen it comes to applications of consumer-grade FDM 3D printers the advantage of 3d printers with linear rails is print quality and reliability.
- The mechanical stresses involved in 3D printing are reduced.
- The movement is constrained along a straight path.
While 3d printer designs with rods + linear bearings are cheap, effective, simpler and lightweight, all characteristics that are highly desirable in a 3D printer. In general, linear rails are preferred over rods because they offer greater precision and smoother motion which can improve print quality and reliability. Specific machine designs benefit from use of linear rails.Depending on the mechanical arrangement of the linear guide system, movement will require rigidity and support from load or gravity.
Linear Rails vs Rods
In most applications, linear rails are prefered over rods. Although, there are specific designs that may benefit from rods. For example, a cantilever arrangement may be better due to linear rails constrain movement in all but one direction, and the orientation offers maximum rigidity against gravity.
While 3d printer designs use rods with linear bearings are cheap, effective, simpler and lightweight, all characteristics that are highly desirable in a 3D printer.
Many of the earlier 3d printers were designed around cheaper mechanical parts such as carbon rods or stainless steel smooth rods which were once commonly used and recommended. As the cost of linear rails become cheaper and cheaper due to the economy of scale and increasing number of buyers and large volume production of manufactures and suppliers. 8mm steel rods and linear bearings are slowly being somewhat phased out but still used on cheap kits found on Aliexpress.
What are linear rails made of?Most linear rails are manufactured from hardened steel and are corrosion-resistant. Hard strength steel or stainless steel is a cold-drawn and ground down to the profile shape and assembled to a linear rail carriage block.
How do you use a linear guide rail?Align and ensure parallelism of the linear guide for proper accuracy.
Are linear rails worth it?Upgrading your 3d printer to linear rails will increase the smoothness of the motion and movements along the axis mounted.
Linear rails can improve print quality through smoothness and precision which will decrease artifacts found on 3d pints.
Here’s the methods to repair linear rails.
- Clean remove the dirt and grease from the rail and carriage block.
- Lubricating light machine oil.
- Run in the carriage along the rail.
- Replace the stainless steel bearing balls if needed.
- Clean and polish the rail channels.
What is a linear rail carriage block?
The linear rail carriage block moves along the rail track groove and constrains the components of the linear slide and provides motion with the direction of a specific axis.
3D Printers With Linear Rails
- Workhorse 3D Printer
- Solidcore CoreXY
Buy Linear Rail Products
Buy 3D Printer Kit
Buy Linear Rails
Linear Rail Stop 2020
$10.00
Linear Stops & End Stop Mounts
Machined Hardware Parts List Machined Hardware Parts 3D Distributed Price Quantity Source Documentation Gantry Plates 2pcs w/bearings $ 80.
00 2pcs. 3D Distributed Folder X- Axis Carriages 2pcs $ 49.50 2pcs. 3D Distributed Folder Y-Axis Carriage 1pc $ 24.50 1pcs. 3D Distributed Folder Y-Axis Motor Mount 1pc $ 22.50 1pc. 3D Distributed Folder Y-Axis Idler Mount
by Shane Hooper
SolidCore 350mm x 350mm BOM 350mm x 350mm x350mm Quantity Description Source $ Each $ Total Documentation Frame Extrusions 2020 T-Slot ZylTech Frame Size List 570mm Long 6 Vertical (Tall) ZylTech Frame Size List 430mm Long 3 Vertical (Z-Axis Rail) ZylTech Frame Size List 660mm Long 4 Length (Long) ZylTech Frame Size List 500mm Long
by Shane Hooper
SLM – Selective Manufacturing
by Shane Hooper
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MGN12 linear rail upgrade for 3d printers
Linear guides are used for linear motion by re-circulating rolling ball elements between a profiled rail and a carriage (bearing block). The friction on a linear rail is only 2% of this of a traditional slide. Linear guides can also be loaded in all directions (no matter how you mount them). These features made the linear rails a preferred solution for high-precision CNC machines. For smaller machines like 3d printers, there are smaller and low-inertia linear rails, like the stainless steel MGN12 of Hiwin.
Using linear rail in 3d printers
The linear rails can be used on all axis of a FDM 3d printer, whatever the type – cartesian or core XY. However, the biggest impact on printing quality is achieved when the movement of the print head is improved (either the X-axis or the XY-axis).
Construction of MGN series rails – rolling circulation system: rail, block, retainer and end cap.This type of linear guides is still expensive and is only used in high-end commercial 3d printers.
Enthousiast however upgrade successfuly existing printers and there are already many designs available at Thingiverse for MGN applications on low-cost popular printers, like Creality, Tevo, Anet. The rails are easy to implement, because they mount natively on the 2020 extrusion profiles of these printers.
There are other more advanced designs for complete coreXY printers with linear rails. One example is the BLV printer, featuring linear rails on all axis. Its cost has dramatically improved when some companies started to offer complete kits with optimized bundle prices. Now it becomes possible to build a better mechanical solution than Ultimaker for less than 1000 USD.
Visit the page of the BLV mgn Cube on Thingiverse
Check the current price of the BLV kit.
Myself, I am fan of Voron Design DIY printers. They also feature linear rails on all axis and provide great performance to cost ratio.
The flagship – Voron 2.
4, is amazing CoreXY machine with unique fixed bed design and gantry frame on belts.
It is fully enclosed and perfect for ABS.
The cost is about 1500 USD
Visit Voron Design
Check the price of Voron 2.4 3d printer kit
My Voron 2.4 3d printerMy Voron Zero 3d printerVoron Zero (aka Voron0) is another printer I built. It is small, portable and energy efficient secondary machine. The linear motion uses MGN07 linear rails.
Cost: in the 600 USD
Read my artcle for Voron0
Check the current price of the V0 kit.
Upgrading the X-axis of Creality CR-10 from V-weels to MGN12 linear guide with direct extruderOne of the main challenges when upgrading the X-axis of a 2020 extrusion based 3d printer to MGN12 linear rail is the design of the X-carriage.
The new carriage should take in account the dimensions of the MGN12 rolling block and the clearance between the fixation holes. Hopefully, Hiwin offers step files to get you started.
When upgrading the X-axis of my Creality CR-10 printer to MGN12, I decided to build a carriage for light direct extruder. I made first a 3d printed model that helped me to drill and cut a metal sheet precisely.
BMG dual drive extruder upgradefor CR-10, Ender and Tevo printers
Now I am using this print head for over a month and I can say it worth it.
The modification is based on the BMG dual drive extruder from Trianglelab – a quality clone of the original Bondtech product.
It is a geared extruder with ratio 3:1, that delivers constant extrusion pressure wathever the filament.
Final configuration of the print head mounted on MGN12H linear rail with BMG dual drive extruder, 23 mm pancake stepper with heatsink and radial part cooling fan.Site map
Site mapMain page-Personal pages-Dmitry Konovalov
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