In order of effectiveness of the modifications (from most effective to least): 1. It's easier than you think, and super useful. Using The #10 spacers and button head cap screws, install the plate - as shown below. Here are a few posts worth calling out: One can also use a prototyping shield: http://www.amazon.com/Arduino-Proto-Shield-R3-Assembled/dp/B007QXTRNA/ref=pd_sim_pc_7?ie=UTF8&refRID=1CMZZMGFR2ZFKR0837PA [17]. Some people have found these necessary, while others have not.[1]. Convert your standard Shapeoko 3 to a Shapeoko XL or Shapeoko XXL. No disassembly of the axes to install parts, if possible. Note the switch is mounted to the outside of the smallest aluminum plate that came with the kit. I used small zip ties to attach the switch to the mount. Insert a bearing into one side. These mount in the slots of the makerslide for limit switches for a shapeoko 2. It goes between the fan and the input control cable. Installing the Limit Switches. Limit Switch Kit Assembly 3. More examples and plenty of discussion about limit switches is in the forums. The length of the part is equal to the width between the rails of the maker slide, so it will not rotate on its own. 16 x V-Wheel (MSK01-05) 32 x bearing (MSK01-07) 16 x precision washer (MSK01-08) (make sure you are using the precision washer and not the standard M5 washer) 1 x M5 bolt (used for aligning the washer and second bearing in step 3). The Shapeoko XXL ships with three (3x) limit switches. Also available on Digikey, Analog Devices, Carbide 3D: Shapeoko 3 Limit Switch Kit (contact Carbide 3D to order) ---, additional switches (N/O) --- wire in parallel. Mount the switches to stationary portion of each axis. Over the past year and a bit I have been faffing with limit switches. photo showing new board having lights for debugging: switches are active low, so when a switch is pressed, it makes contact with GND. ... we have allot of replacement parts and upgrades that suit all of the above and can help with the niggling issues. Re: Rob's Franken-Mods --- shows hall effect switches and wiring up w/ a breadboard. https://github.com/grbl/grbl/issues/63#issuecomment-4248414. Extensive discussion in Skip's Shapeoko 2 #3181 The only difference between homing and limit switches is one of terminology (which is often confused), quantity (limit switches, in the physical sense, come in pairs, except maybe the Z), and position (homing switches as noted are all at one corner, while limit switches are paired one at the end of each axis of movement). B13701-45 - Goodman OEM Furnace Replacement Limit Switch L300 by OEM Replm for Goodman. 2 pieces of Misumi HFSQN4-15250-500 will perfectly fit an SO2. 5.) With all of the wires connected and routed back to the controller, you can safely remove the controller cover again. 20--24 gauge, preferably shielded. Then the magnets can be attached to inside parts. Originally this was termed a wasteboard. Homing. Forum discussion: http://www.shapeoko.com/forum/viewtopic.php?f=7&t=6049#p46540, CNCzone: http://www.cnczone.com/forums/open-source-cnc-machine-designs/101878-cnc-forum.html. Step 4 — Install the Z-Axis switch and Plate. The clearance was set to .4 with fusion 360 but I was using a very long end mill Amana 46590 - a 4 inch with 2.75 reach to carve out a 3 inch thick block on top of 1/2 inch spoilboard on top of 1/2 aluminum base. When looking at the machine from the same direction as this image (from the back of the machine), all of the wires in the connector should be on the right hand side. **! It homes. Insert one end of a belt through the belt clip as described above. You can use most regular magnets; just pay attention to the pole(s) that activate it. Some users have chosen, or found it necessary to adjust the plate placement using washers. All the locations of switches I used are in the pictures. Use existing leftover M5 hardware. Everything you need to know about using our products. Whats included in a traditional limit switch bundle? Again, the switch is mounted on the outside of the plate. Note: Stepper motors are Smart Automation SM42HT47-1684B. Shapeoko / Shapeoko2 / Shapeoko 3. For each X Limit Actuator Mount (#7 & #8), screw a 4mm nut (#20) onto one of the 4mm button head cap screws (#19) until it is just under the head. ***** Probably good enough for most of what I do, though I might run some tests later to see what actually happens. The holes are spaced for a standard reprap sized microswitch. 1. The instructions will help you install the limit switch kit sold through the Carbide 3D store. The newest magnetic mounts do not need the limit switch block. Winston Moy 36,773 views. Adding 6 limit switches (one at the end of each axis) is highly recommended. Step 5 — Install the Y-Axis Switch and Plate. The wires can be routed below the X-axis stepper motor and then bundled together with the X and Z axis stepper motor wires. Discussion of various types and quality of switches in Re: Combatting Endstop Noise. The Carbide3D Shapeoko Standard Robust CNC Router Kit is designed to be affordable enough for any shop and powerful enough to do real work. But you must do your research on the components and some coding may be required. The latest tutorials sent straight to your inbox. $7.91 $ 7. Note: This video is super obsolete. Step 7: Limit Switch *****UPDATE 2-20-2019***** This limit switch block is only for older style mounts. They were working pretty well until I did a job boring 66 largish holes in some MDF. Dual Y drive (either Drive Shaft or Dual Motor) 2. The width of the mount tapers down so that it does … Doesn't need to be RF necessarily -- could also be ground-coupling, or capacitive or inductive coupling from the fairly large currents and large voltage swings on the stepper driver wires. Description. The best proposed solution that emerged from all the collective fiddling with this seems to be an external pull-up (say 1 Kohm to IOREF), followed by a low-pass RC filter (say 10 Kohm in series and 100 nF ceramic to ground). Magnetic sensors, such as Hall Effect sensors, are a great option as they only need to be calibrated once and are very reliable even if dirty. If your board has LEDs which indicate which switch is depressed, it is a good idea to verify that the switches are plugged in properly. Mechanical Limit Switches for the ShapeOko--- blog post noting replacing optical switches w/ mechanical and reasons for making this change. I have not had a problem myself, so I had no reason to drag out the scope and look at it, I'm just pointing out that many people have complained about false limit switch triggering. The pin numbers in this schematic apply to grbl 0.8 and the default configuration on 0.9. User cvoinescu made an initial codification of the effect of upgrades on stiffness / rigidity in the forum thread Custom Plates. As shown in the image below. 73. Photo interrupter as limit switch . The Shapeoko 3 limit switch kit from Carbide 3D provides an easy and reliable way to add limit switches (home switches) to your current setup. Ensure that the head of the bolt is on the side opposite the X mark. Required parts. X carriage reinforced with, say, extrusion between the two plates, i… "[3], Electromagnetic, at any rate. The limit switches will use the connector below. [4], Do not run the limit switch wires next to stepper motor wires w/o adequate shielding.[5]. Limit switch mounts designed for all axes. When the switch is open it is pulled high to 5V. The limit switch cable from the shapeoko to te control box will use the connector below. In this picture the Z-axis springs have been removed for clarity. The Shapeoko is made in the US and comes with a 12 month warranty. For example, mechanical are the easiest to setup, test, and adjust; but they are also physically moved and therefore can fail or get in the way. This product is discontinued and replaced by RB-CRB-94 an improved version. There are pros and cons to each. Make certain that all of the switches depress properly as the machine moves towards that extent of its motion. If you’re having problems homing your machine, the limit switches are the first thing to check. Installing a Homing and Limit Switch Kit - Shapeoko Project #48 - Duration: 5:25. A touch plate allows one to home the machine in the Z-axis. You're much better off running NC switches to GND, but then you need the pull-up resistors (from each pin to IOREF, 1 Kohm or so). Step 3 — Plug in connector to the 12 Pin header. Initial information gathering for adding home switches to shapeoko. X-Axis Rail Belt Installation. The kit includes everything you need. In noisy environments (which the shapeoko is in because of the stepper motors and spindle, probably other stuff too), the internal pull-up resistors are not as effective as lower ohm external pull-ups. Shapeoko accepts standard gcode so … Since it is preferable to not cut into or replace it, it is now termed a baseplate. So in this post – Limit Switches for the ShapeOko – I installed some optical switches as limit switches. Just bolt it together and you’re all set. See Touch Plate (which has a basic design, usage instructions as well as links to other designs and further information) and the elegant: Touch Plate v2 (which shows how to make a nice one using connectors and soldering). Four switch mounting holes for mounting in any orientation. Shapeoko HD. This usually results in a grinding noise as the hard stop engages while trying to find the home switch. Step 6 — Mounting the X axis Switch and Plate. Homing switches are used (one per axis) at one corner of a machine to set the origin in a consistent and repeatable fashion. Having problem with limit switch hit. Insert the 4mm button head cap screw into the X Limit Actuator Mount and screw a second 4mm nut onto the end of the bolt. Run the X-axis back and forth as you route your wires to ensure there is enough cable length to meet the extents without straining the cables. The switches have a repeatability rating of .3mm (.012″) which is pretty good. Note the connector is polarized and will only fit one way. Limit switches can be mechanical, magnetic, optical, or a combination. Review the items below to help you identify what could be causing your limit switches not to trigger. Cutting Area (XL): 33"(X), 17"(Y), 3"(Z) Cutting Area (XXL): 33"(X) x 33"(Y) x 3"(Z) The kit includes everything you need to convert your standard machine to a larger version. New Front and Back Plates New Cross Members Longer Extrusion(s) Longer Bel 6.) The microswitches proved with the kit are pre-wired, and only need to be bolted to the aluminum plates. Step 2 — Remove the controller shroud by removing the M6 socket head cap screws that keep it in place. The stepper motor cable from the shapeoko to the control box will use the connectors below. http://www.shapeoko.com/wiki/index.php/Touch_Plate#Touch_probe, http://www.shapeoko.com/forum/viewtopic.php?f=7&t=6218&p=48353#p48345. Limit Switches. The kit includes everything you need. Filter Out Limit Switch Noise --- commentary on GRBL Github by Ben Harper. [2], Normally closed (NC) vs. Open: http://www.shapeoko.com/forum/viewtopic.php?f=3&t=5156&p=37798#p37767 "...interference causes false triggering of the switches. Using two (2x) M5x35mm socket head cap screws and 2 1” standoffs, attach the X-Axis Limit Switch to the rear of the X-axis Plate. I think the Uno has 20k internal pull-up resistors. http://docs.carbide3d.com/software-faq/home-switch-troubleshooting/, 1 × Z-Axis switch Plate (black anodized aluminum), 1 × X-Axis Switch Plate (black anodized aluminum), 1 × Y-Axis Switch Plate (black anodized aluminum), 3 × M3 × 16 Socket Head Cap screw (stainless steel), 3 × Microswitches - prewired and terminated into header(s), 4 × #10-24 × 1/4″ button head cap screws (stainless steel). Route the wire up and across the top standoff, then back through the partially opened hole on the top of the Y plate. Note the orientation of the plate in the photo above. 4.) One can instead use aluminum T-slot. The importance of improving this cannot be understated as noted in forum discussion: Re: spindle power / feed rate. These sensors are extremely accurate and give consistent results. 3.) The Shapeoko 3 limit switch kit from Carbide 3D provides an easy and reliable way to add limit switches (home switches) to your current setup.