DC motor slow in one direction, fast in the other!
DC motor slow in one direction, fast in the other!
(OP)
Hi,
Apologies if this is a dense question - my background is mechanical, not electrical!
I've got a 24Vdc motor connected to a 24Vdc, 6A, power supply.
The circuit runs through 2 relays, one switches the circuit on & off, the other reverses the motor direction.
I also have a motor speed controller in there & 2 limit switches.
I can get the motor to run in both directions, however in one direction it is fine, I can adjust a wide range of speeds with the speed controller, no problem.
Running in the other direction, even with the speed controller set to max, it runs very very slowly, on the limit of stalling.
Might this be solved by a higher current power supply? (the green light on the PSU dims & goes out when running in the slow direction!)
Many thanks.
Dave.
Apologies if this is a dense question - my background is mechanical, not electrical!
I've got a 24Vdc motor connected to a 24Vdc, 6A, power supply.
The circuit runs through 2 relays, one switches the circuit on & off, the other reverses the motor direction.
I also have a motor speed controller in there & 2 limit switches.
I can get the motor to run in both directions, however in one direction it is fine, I can adjust a wide range of speeds with the speed controller, no problem.
Running in the other direction, even with the speed controller set to max, it runs very very slowly, on the limit of stalling.
Might this be solved by a higher current power supply? (the green light on the PSU dims & goes out when running in the slow direction!)
Many thanks.
Dave.





RE: DC motor slow in one direction, fast in the other!
Dan - Owner

http://www.Hi-TecDesigns.com
RE: DC motor slow in one direction, fast in the other!
Apologies, have had a go at drawing one here, hope it conveys what I've got!
Essentially two DPDT relays one changes the motor direction, the other switches everything on & off.
S1 & S2 are limit switches (have tested & they work)
The two SPDT relays are part of a PC controlled board, so letting everything be controlled by PC software. (tested & working).
Many thanks,
Dave.
RE: DC motor slow in one direction, fast in the other!
RE: DC motor slow in one direction, fast in the other!
TTFN
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RE: DC motor slow in one direction, fast in the other!
Its a brushed motor - see attached for data sheet.
Many thanks,
Dave.
RE: DC motor slow in one direction, fast in the other!
so guess from that the motor should work equally well in both directions?
RE: DC motor slow in one direction, fast in the other!
TTFN
FAQ731-376: Eng-Tips.com Forum Policies
Chinese prisoner wins Nobel Peace Prize
RE: DC motor slow in one direction, fast in the other!
TTFN
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Chinese prisoner wins Nobel Peace Prize
RE: DC motor slow in one direction, fast in the other!
Will try swapping the wires & let you know!
Thanks,
Dave.
RE: DC motor slow in one direction, fast in the other!
RE: DC motor slow in one direction, fast in the other!
RE: DC motor slow in one direction, fast in the other!
RE: DC motor slow in one direction, fast in the other!
You should probably assume that the speed controller is fried due to the polarity reversal.
RE: DC motor slow in one direction, fast in the other!
The speed controller is: http://www
I reversed the wires on the output side of the controller - so hopefully it isnt fried!
Will try wiring it without speed controller at all & see the effect!
RE: DC motor slow in one direction, fast in the other!
RE: DC motor slow in one direction, fast in the other!
Many thanks for all the help!
Dave.
RE: DC motor slow in one direction, fast in the other!
but adding a fuse between PSU and now suspect controller ,may save the PSU if it all goes horribly wrong !
Sparky
RE: DC motor slow in one direction, fast in the other!