I need to control the force of 3 electromagnets wired in parallel to pick up steel discs that are piled up in a stack.
Discs range from 4" to 42" in diameter of various thicknesses (0.075" to 0.25"). 1/2 lb to 85lbs. About 30 different format total.
One stack is composed of only identical discs (diameter, thickness, finish) up to 50 pcs for small sizes.
I'm designing the machine that will pick up the discs.
The goal is to pick up only one disc at a time and thus my need to adjust the voltage that will power the electromagnets. I'll set them up to produce a bit more power than needed to lift one disc but less power than for 2.
The PLC running the system will "know" which discs are next and will have the settings for each disc pre programmed (50% power for medium disc, 85% for large discs for example).
Note: I will setup 3 sets of 3 magnets to match different diameter/force requirements. PLC will control which set is needed at which power.
My PLC (P2000 Automation Direct) can output a 0-10V signal to control the power needed.
Strongest electromagnets used are 24VDC, 0.37A, 420N 8.9W each.
I did some research and was surprised I couldn't find a power supply or a standalone MOSFET Board I could use with 0-10V input to power the EM 0-24VDC. I'm looking for 2A power supply min to have some buffer.
I found a complete machine that does exactly what I need and they are dealing with the 0-10V signal to 0-24VDC output with a custom proprietary board. ;(
I have been toying around the idea of using a DC motor drive that will receive the O-10V input and output a PWM signal to the EM.
What do you guys think?
Any other ideas?
It's a 1 off project.
Thanks a bunch!
Sylvain.
Discs range from 4" to 42" in diameter of various thicknesses (0.075" to 0.25"). 1/2 lb to 85lbs. About 30 different format total.
One stack is composed of only identical discs (diameter, thickness, finish) up to 50 pcs for small sizes.
I'm designing the machine that will pick up the discs.
The goal is to pick up only one disc at a time and thus my need to adjust the voltage that will power the electromagnets. I'll set them up to produce a bit more power than needed to lift one disc but less power than for 2.
The PLC running the system will "know" which discs are next and will have the settings for each disc pre programmed (50% power for medium disc, 85% for large discs for example).
Note: I will setup 3 sets of 3 magnets to match different diameter/force requirements. PLC will control which set is needed at which power.
My PLC (P2000 Automation Direct) can output a 0-10V signal to control the power needed.
Strongest electromagnets used are 24VDC, 0.37A, 420N 8.9W each.
I did some research and was surprised I couldn't find a power supply or a standalone MOSFET Board I could use with 0-10V input to power the EM 0-24VDC. I'm looking for 2A power supply min to have some buffer.
I found a complete machine that does exactly what I need and they are dealing with the 0-10V signal to 0-24VDC output with a custom proprietary board. ;(
I have been toying around the idea of using a DC motor drive that will receive the O-10V input and output a PWM signal to the EM.
What do you guys think?
Any other ideas?
It's a 1 off project.
Thanks a bunch!
Sylvain.