Dual Z bed leveling question.
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@tletourneau That's definitely some wobble there. Two lead screws like that will always have instability. You may want to look into a 3 lead screw arrangement. Check the printer in my signature to see what I did to solve the issue on the Dbot. I could probably stand on my bed and it's not going anywhere.
I think 2mm lead would be a good compromise. The 1mm lead is rather slow for movement and you end up having quite a bit of rotational momentum so slow acceleration and deceleration is needed. For normal printing it's irrelevant, but if you're going to be jogging the bed a lot then 2mm for sure.
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@phaedrux Yeah, I've thought about adding a third Z. I think I'll order four 700mm T8*2's in case one is bent to give me the option of adding a third screw in the future. I like the idea of parallel motors so I'd be looking at adding a Duex 5 to get more drivers to drive a third axis.
Are there any concerns cutting the lead screws to the correct length?
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@tletourneau just be sure to protect the threads and you'll want to bevel the edge after you cut it.
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Well I ordered a pair of 670mm 8mm T8x2 Lead Screw Trapezoidal ACME w/ Small Delrin Anti-Backlash Nut kit from ZYLTech. The parts were significantly less expensive from
aliexpress but once you add the shipping cost it came out fairly even although I'm only ordering two they have it in stock and I ordered it second day air.Here is the link to what I ordered.
http://www.zyltech.com/8mm-t8x2-lead-screw-trapezoidal-acme-w-small-delrin-anti-backlash-nut-kit-custom-length-up-to-1000mm/
