Yes, this particular LDO V2.4 350 kit came from West3D, and West3D (not LDO) included a Pi4-2. LDO kits did include Pi's at first, but then they stopped when availability was problematic. So it seems to be up to the kit vendor to add one at the moment, which some of them have been doing. Recently the Pishop in the us had Pi4-1GB's available with a limit of 5. Digikey has had good stock of many configurations but they don't carry the 1GB version. Memory usage with the OS and Klipper seems to be about 0.3GB so a 1GB Pi is adequate. The Pi3B+'s were fine and those only have 0.5GB of memory.
I've been drawn to other projects but have been making slow progress on the V2.4 wiring. AC is in and power supply checked. Motors are labelled and wires are partially installed. Heatbed and Z probe wiring are in.
Tonite I took the V0.2 Z motor out and removed the anti-backlash nut and spring, and cleaned up the dust and reassembled without them. The friction went way down. Apparently the combination of the teflon coated leadscrew and the anti-backlash nut and spring causes extreme wear on something, the friction kept going up and there was a lot of dust on the leadscrew. I suspect the teflon coating is not smooth enough and teflon is harder than the delrin nut so the nut gets torn up. So either run without the anti-backlash setup or run a non-teflon coated screw with lube and then the anti-backlash could be used (but apparently is not needed). The vendor (in this case Fabreeko) provided another motor with integrated leadscrew that is not teflon coated, and a new nut set, but I thought I'd try this first. It has been printing fine even with the friction, but I have had to raise Z motor current several times and now it is about at the limit.
Ken226, nice job on the belt tension meter. I've used the little one that Prusa and others have modelled, not fancy, one part print, flexes, no bearings. Calibrated when printed with PETG at least to Prusa standards.
Last edited:
