Gates info is here. Sdp-si has the pulley info.by etfrench - General
I'd recommend getting Kicad and layout the board. Three drivers with motor, logic, and power connectors plus a capacitor for each driver should take about 5 minutes to create.by etfrench - General
I used GT2-3mm timing belts instead of spur gears on my Rose Engine. Large pulley is 180 teeth and the small pulley 20 teeth. It's driven by a 90 oz-in NEMA 17 motor. Cutting forces are quite a bit lower than they are on metal lathes. There are quite a few examples online of people printing module 1 gears to use on metal lathes, so I wouldn't worry too much about having them fail. p.s. The diby etfrench - General
Don't worry about getting the gear ratio to exactly match 360 degrees. If you have a 5:1 gear reduction, and use 32 microstepping mode, each microstep will be .01125 degrees. This is more than accurate enough for indexing. Use a gear ratio that gives you the holding torque necessary. I don't think NEMA 17 steppers are going to have enough torque to hold the work in place during the machiningby etfrench - General
You can form delrin (acetal) the same way. It does give off formaldehyde gas if you get it too hot, which is rather hazardous to your health.by etfrench - Delta Machines
I don't think you need to have the linear rails at 90 degrees to the bed. Delta software should be able to handle the offset. Would it be better to have the narrow diameter at the top or at the bottom? I'd vote for top.by etfrench - Delta Machines
QuoteDust @JonathanThompson Ill make a suggestion. Please pass it on. For home users there needs to be a option. Turn off auto updates and reboots, but doing so can result in all internet connectivity except patches and updates being disabled. Disabling happens as soon as a dangerous exploit patch is released and there machine refuses to apply it. Also make it extremely obvious when this hapby etfrench - General
A little research on the web will get you info on how to prevent updates at inconvenient times.by etfrench - General
has a few extras, but I'm sure they sell just the heatpad. My Keenova heater has worked flawlessly for several years.by etfrench - Reprappers
The three main attributes to consider of a stepper are torque, current, and inductance. Specifying one without the others is rather meaningless. You can have a 20 oz-in motor that draws 2 amps or a 90 oz-in motor that draws 1.5 amps. Here's a good explanation of stepper speed and torque: This spreadsheet may also help:by etfrench - Reprappers
Quotefinix The deflection (your "sag") of the 'X' and 'Y' shafts are complemented with a very similar deflection of the 5/16" glass workbed. The tip of the hotend travels in a plane that's quite parallel to the bed, allowing printing anywhere on the bed's surface. In other words the bottom surface of the print will follow the surface of the bed which is not flat (or planar). I think this will bby etfrench - Reprappers
You're probably lucky. They could have sent some marginally working steppers and then insisted you return them to get a refundby etfrench - General
Won't that script just put the individual models in the same XYZ space. Slic3r won't be able to arrange them.by etfrench - General
Isn't that bell a copy of an actual bronze bell an artist created long ago?by etfrench - General
Why would you want to move the bed instead of the extruder/hotend?by etfrench - Reprappers
The frame size like NEMA 23 or NEMA 17 doesn't tell you anything about the holding torque of a motor other than NEMA 23 motors are generally stronger than NEMA17 motors. The 475 oz-in NEMA 23 motors on my CNC router wouldn't have any trouble lifting your entire printer. The bed might lower to the bottom with a power failure, but I wouldn't expect it to slam down.by etfrench - Reprappers
Hmmm. No mention of any safety issues with installing it on an unenclosed 3d printer. Would you trust them?by etfrench - Laser Cutter Working Group
I'm curious about why you don't use a standard bevel gear tooth profile? Your model doesn't seem like it would be very efficient.by etfrench - Reprappers
The purpose of a bushing is to constrain something to move on a shaft. Rubber o-rings will reduce the amount of constraint and do it in unpredictable ways.by etfrench - General
I used a 425mm round Mic6 disk 8mm thick. Heater is 120V, 500w. Print area is around 320mm. I wouldn't recommend thinner plate for a bed this size.by etfrench - Reprappers
Quotedlc60 So even though the part was stuck like set concrete to the bed, the corner STILL LIFTED, just not nearly as much. Adding frog's feet (just round pads) several layers thick to the corners will help keep them stuck to the bed. You can also put some ABS juice on/around the perimeter after several layers have printed.by etfrench - Reprappers
Quote691175002 (I wish slicers would let you define a per-filament scaling factor because sometimes I forget to print ABS at 100.6%. I mean I could change my firmware steps/mm but that screws up prints in other plastics and is a pretty dirty hack that could have other consequences.) Slic3r makes it easy to have multiple config files for different filaments.by etfrench - Reprappers
What results do you get manually moving the arms to the max position? Did you calibrate it at the maximum distance from each tower? Are the arms less than 20 degrees from parallel when they are at maximum distance? The carriage for arms 355mm long should be about 120mm above the effector for a 20 degree angle. Longer arms may solve your problem.by etfrench - Delta Machines
The A4988 is only rated at 1 amp with no cooling which would be barely enough to run your 1.3 amp motor. With active cooling it can handle 2 amps. A drv8825 driver can handle 1.5 amps with no cooling and 2.2 with cooling. It would be a better choice.by etfrench - General
I thought about using Traxxas ends on my delta until I bought a set. The tolerances were quite bad and they weren't particularly spherical. You would be much better off with ball bearings on a post. You use them with or without magnets.by etfrench - Delta Machines
I used this silicon heater. You also need an SSR. You should be aware that many Fotek counterfeits are sold on ebay and other chinese vendors. Keenovo sells the genuine Fotek SSR. Keenovo will also supply the wiring schematic.by etfrench - Reprappers
1. Mic6 (or other cast aluminum) can be as flat as glass plates. Glass plates may or may not be flat. 2. My aluminum bed is loosely anchored on 3 supports which allow it to expand and contract without bowing. 3. I use a silicon heater glued to the underside of the bed and underneath that is .5" insulation. There is an air gap between the insulation and the base. 4. The base is a torsion box witby etfrench - Reprappers
Printer is enclosed. Bed is 5/16" aluminum with Printbite build surface. I start with bed temperature of 128, then drop it 5 degrees every layer until 105. First layer hot end temperature is 250, then drops to 240. Filament: 1.75 Layer height: .07 Aluminum is tougher than PLA.....by etfrench - Reprappers
Put a metal sleeve around the carbon fiber arms before tapping. Remove when done.by etfrench - Delta Machines
Putting the stepper motors and microcontroller on top instead of underneath will make it easier to work on as well as simpler to wire.by etfrench - Delta Machines