Hello there. I am planning to build a frame that are to lift a pallet with a weight of approx 70 kg vertically in a distance of 120 cm. I am concidering to use 4 Openbuild C-beams, each with a nema 23 high torque, but i am struggeling to find out if this will be a strong enough configurasion to perform the job, and what speed i could expect of this. Also not sure if openbuilds will be able to supply beams with 120 cm work area, but they are working on giving me an answere on that. Meanwhile i would love if anyone here could share some ideas on the above questions. brgds Oerjan
The issue here isn't the beams but the screw that does the lifting and it's an issue for a number of reasons. TR8x8 screws shouldn't be taken beyond 1 meter as the spinning of the screw causes it to whip. Additionally with the length of the screw desired it would need to be fully supported from the top as the amount of load you're intending to lift would cause the screw to buckle if you try to support it from the bottom. It will take some research on your part to find a manner that will support the screw from the top as I'm fairly certain than none of the OpenBuilds attachments will support the required load. The TR8x8 screw is also extremely aggressive with its 8mm lead. There are two problems with this, it requires a substantial amount of power to lift a significant load and the load will drop like a rock should power in any way be interrupted. And finally the whole assembly is counting on threaded Delrin (i.e. plastic) lead screw nuts which will only take a limited amount of abuse over a period of time. You really need to consider using a low angle ball screws for the intended use. The problem with this is that any suitable ball screw won't fit within the C-beam channel. You'll be looking at a complete redesign of the system.
Hi Rick, and thanks for the reply, do you know where i can find out more about the low angle ball screws? And say that i was to get some custom made beams that would fit those screws, will it still be possible to use the nema 23 high torque motors, together with the xpro controller and the DQ motor drivers? Or should i aim for some bigger motors? My project is to lift a pallet with empty aluminum cans, the full weight is about 70 kg, and i want it to be liftet layer for layer, so approx 11 cm pr. lift process. On the top part of the frame i am planning a V-slider to push each layer out of the frame in a horizontal movement. I am quite confident that the open builds aluminium profiles is the way to go on making the frame and the horizontal push functions, but my headache is the vertical beams and lifting gear for the vertical lifting. Hope for some good tips, brgds Oerjan
Sorry but I've never used them. Hopefully someone on the forum will chime in with suggestions. It's possible but without doing the math I really can't say. Using geared motors is also an option. This is the kind of thing that will require some research on your part.
Hi Rick, I have now found a linear actuator from a company called Fuyu, and i am looking in to the FSL80 that they deliver. FSL80E50010C7 - Linear actuator / electric / stepper / ball screw by Chengdu Fuyu Technology Co., Ltd | DirectIndustry But i still want to use openbuild aluminium profiles to build my frame, and i want to use the V slider function for performing the horizontal push when the cans are lifted in position. Do you think that the actuators will incorporate with the openbuild profiles, and will i be able to control these actuators with the contollers that you guys sell? Brgds Oerjan Solvaag
Okay. At the risk of seeming to be really thick: How does the cover over the screw work? FSL80E50010C7 - Linear actuator / electric / stepper / ball screw by Chengdu Fuyu Technology Co., Ltd | DirectIndustry Cool looking units though. I wonder how much they cost?
Very nice looking actuators. Should be able to incorporate these. It all comes down to working out the connections. These connect with M6 screws while the OpenBuilds system typically uses M5 screws. Again, should be able to incorporate these. The Nema 24 motors will draw too much power for the xPro board but should work with the DQ542MA Stepper Motor Driver or with the new Black Box Motion Control System. You might contact FUYU and make sure the steppers are bipolar and are less than 4.2 amps.
The main reason is simply they connect properly with the DQ542MA stepper motor drivers whereas unipolar motors don't. Unipolar motors have a different wiring scheme. Unipolar steppers also generally provide less power output than a similar sized bipolar stepper because they only use half the coils at once.
