+James Armstrong Looking for feedback on our CORE XY design and any tips to ensure no binding a smooth motion.
We have set this up so we can test attaching the belts to the center, one on top and one on bottom of the print carriage on each side but we can also configure this setup to connect the belts to the left and right sides of the carriage one on top and one on bottom. The pictures depict the centerline configuration. What are your thoughts on this. Also we are using 59oz inch capable holding torque motors with .9 degree step that are micro-stepped at 1/16th with a Trinamic 2100 steppers in Spread Cycle… Should we be using stronger motors? The build area is 12x12x12 and the total length of each belt is about 8 feet. We are using a 32 tooth drive pulley and our pulley stacks that act as idlers are F625ZZ bearings (5x16x5mm)… We have been using IGUS Bearings and solid anodized aluminium rods.
What tips could you offer us to ensure our components fit together perfectly and don’t cause any binding on the rods…
@Ryan_Carlyle & @James_Armstrong Looking for your CORE XY Wisdom here…
Sorry, I think we were supposed to get together on a call and I forgot.
@Vernon_Barry
Why 32t pulleys? That’s much larger than most people use for this.
It moves really nice but I am getting binding on diagonal moves
plus the large drivey pulleys should help with belt ware
Both belts tensioned the same? Run it to one side if possible and make sure both ends of the X bar are the same distance from the frame and if not tighten on belt to make them the same.
@James_Armstrong
missing/deleted image from Google+
missing/deleted image from Google+
missing/deleted image from Google+
missing/deleted image from Google+
Basically I am getting a slight discrepancy in my Core XY… I mean the machine prints beautifully and I am very happy but I am so close to reproducing very accurate prints. How should I address adjusting the hardware to make up for the 1/4 millimeter discrepancy as shown in my calibration print @James_Armstrong
missing/deleted image from Google+
left gantry
missing/deleted image from Google+
right gantry
missing/deleted image from Google+
left rear pulley block
missing/deleted image from Google+
right rear pulley block
missing/deleted image from Google+
Any thoughts from you @Ryan_Carlyle on how I should adjust for the slight skew?
Are you sure you’re measuring actual travel distortion, and not an extrusion effect? Like a zipper or elephant’s foot that throws off the measurement. Try printing a BIG calibration object (like 150mm) and see if the error scales up or stays about a quarter millimeter.
Yeah I always avoid measurements including the bottom edge of the print for that reason. I am printing this right now, almost done.
This isn’t 150mm more like 3/4 of that but I can scale it up as soon as this one is finished. Basically the larger the print the easier it will be to isolate what needs to be adjusted or something else?
missing/deleted image from Google+
