Calculating Electrical Motor Specifications required to lift 30kgs via a scissor lift mechanism which is driven by a Lead-Screw
Budget: £20 – £250 GBP
We are building a scissor lift mechanism which has a double-lift mechanism, allowing for x2 of vertical lift for every x1 of horizontal movement. This scissor lift mechanism has the following specifications:
Each arm is 800mm long
The arms are made of 25mm box steel
The left side of the scissor mechanism is connected to the right via 10mm threaded bars
The scissor mechanism is 400mm wide
The scissor mechanism lift range is from 100mm (bottom) to 450mm (top) giving a total lift of 350mm
The scissor mechanism is driven by a lead screw
The total horizontal travel along the lead screw to achieve the required 350mm lift is 175mm
We are advised by the manufacturer that the lead screw will travel 8mm p/sec at 120 RPM
We require that the total lift be achieved within a maximum of 10 seconds. This would suggest 240 RPM or some gearing mechanism
The total weight to lift is 30kgs
The lift operation must be silent (or very quiet)
The lift operation must be smooth, low maintenance or maintenance free with zero X/Y movement
The mechanism will be powered by an electrical motor. We now require that you provide the calculations to determine the electrical motor specifications, sufficient to achieve the above require lift and lower capabilities.
We would prefer that the electrical motor was powered by low voltage, rechargeable USB battery packs. This would allow the scissor lift to operate without need for connection to mains power.
The motor should operate silently. It will go through approximately 500 complete lift and 500 complete lower movements each year (maximum). It must be designed to last for 5 years so that we can provide a warranty (guarantee) for the same.
We seek advice on the appropriate electrical motor to use, based on the above requirements. Any advice must be substantiated with engineering calculations that can prove/demonstrate the required electrical motor specifications.
We attach a basic CAD image showing the scissor mechanism. You will note the lead screw is shown at the base of the scissor mechanism. One side of the scissor mechanism is wheeled and the other side is fixed.
This issue is most likely best resolved by a mechanical engineer who has expertise in rotating equipment and an understanding of electrical motors. This should be a very simple equation for a qualified engineer to calculate.
Each arm is 800mm long
The arms are made of 25mm box steel
The left side of the scissor mechanism is connected to the right via 10mm threaded bars
The scissor mechanism is 400mm wide
The scissor mechanism lift range is from 100mm (bottom) to 450mm (top) giving a total lift of 350mm
The scissor mechanism is driven by a lead screw
The total horizontal travel along the lead screw to achieve the required 350mm lift is 175mm
We are advised by the manufacturer that the lead screw will travel 8mm p/sec at 120 RPM
We require that the total lift be achieved within a maximum of 10 seconds. This would suggest 240 RPM or some gearing mechanism
The total weight to lift is 30kgs
The lift operation must be silent (or very quiet)
The lift operation must be smooth, low maintenance or maintenance free with zero X/Y movement
The mechanism will be powered by an electrical motor. We now require that you provide the calculations to determine the electrical motor specifications, sufficient to achieve the above require lift and lower capabilities.
We would prefer that the electrical motor was powered by low voltage, rechargeable USB battery packs. This would allow the scissor lift to operate without need for connection to mains power.
The motor should operate silently. It will go through approximately 500 complete lift and 500 complete lower movements each year (maximum). It must be designed to last for 5 years so that we can provide a warranty (guarantee) for the same.
We seek advice on the appropriate electrical motor to use, based on the above requirements. Any advice must be substantiated with engineering calculations that can prove/demonstrate the required electrical motor specifications.
We attach a basic CAD image showing the scissor mechanism. You will note the lead screw is shown at the base of the scissor mechanism. One side of the scissor mechanism is wheeled and the other side is fixed.
This issue is most likely best resolved by a mechanical engineer who has expertise in rotating equipment and an understanding of electrical motors. This should be a very simple equation for a qualified engineer to calculate.
Related categories:
Mechanical Engineering
Electrical Engineering
Structural Engineering
Engineering Mathematics