Hello. Now that my eustathios is my main printer for my 3D Hub, I want to go much faster than 60mm/s.
What are your thoughts on carbon cross rods? Thinking square with pulleys or round with igus?
Will make super light carbon 3d printed carriage. Walter’s is too heavy for 80-100mm/s
Already have a bond-tech with slightly faster gearing.
My worry would be the straightness of the carbon rods. The rods in the BOM are spec’d to L/100x0.01mm (where L is the length of the rod). Looking up carbon rods I found one spec at 2mm/1000mm which going to cause a lot of binding.
One option to increase the max speed would be to use 9mm wide belts so they exhibited less stretching during fast accel.
If you want to save a couple grams you could also use the Mosquito hotend (https://www.sliceengineering.com/shop/mosquito-hot-end) but I haven’t heard any wide adoption yet as it was only debuted at MRRF this year
https://www.sliceengineering.com/shop/mosquito-hot-end
FYI: From another list source, the Mosquito’s are delayed, again.
What material are you printing? Perhaps the Merlin will do what you need?
Speed: have you tried any benchmarks to see if it will make a measurable difference in time? If you are making lots of 1-2 smaller parts it may not be worth it. If you are making any quantity of 2-12 hour parts, yes, go for it. ,
https://reprap.org/wiki/Merlin_Hotend
@Dennis_P I am printing a ton of parts. Usually 5-20 per job
@Zane_Baird that’s a great idea with the belts. I will probably try that with a lighter carriage for now.
I see what you are talking about with the rods. I think square with pulleys won’t bind.
There’s a rep rap out there with carbon rods just forgot the name 
What issues are you seeing when you run faster than 60mm/s?
@John_Gadbois just less accurate, ringing etc. also kinda want to build the fastest eusthstios 