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Hey all after blowing my leadshine drivers (my fault)
Ive finally save up for the gecko g203v's
and the Pdmx motherboard for them along with the Pdmx 26
4x geckos cost me £567 from charter controls
Pdmx boards cost like £200 posted from us
now here's my next problem
my power supply
motors are rated at 3.78v
current is 4.2a/phase
inductance is 3.8mh/phase
any recommendations for a psu to drive 4 motors ?
Thanks in advance
Have you bought the Gecko drives, if not why not stick with Leadshine drives (are you sure you have blown them up).
Re the power supply the Gecko drive with take up to 80V but I would keep it down to around 70V. Something like http://www.zappautomation.co.uk/elec...er-supply.html or find one with a little more amps .
Have you got two motors on one of the axis if so will the Pdmx board support slaving?
I couldn't fault the leadshines to be fair I just thought I'd get the geckos as there is so much info on them so I now have 4
the leadshine may come in handy for another project, just wanna get the plasma working
the Psu from zapp only has 3 outputs
yes I have two motors on 1 axis and yes I'm sure the pdmx supports slaving
doing some research and it looks like for these motors 62v is the right Psu
is this correct?
I think you will find that all the outputs are connected together so you can just connect two to one of the outputs.Quote:
Originally Posted by Lewywri89
If you read the Gecko manual it says that the motor voltage can be up to 20 time the rated voltage on the motor ie. 75.6V
I found this calculation online saying
take the square root of the motor inductance which is 3.8mh
times it by 32 and this is the voltage
is this the wrong way to calculate?
thanks again for the help
the pmdx 126 can only be slaved if used with pmdx 134 I think
Well you are using Gecko drives so why not take their figures? I take it you are using nema 23's motors, It will run fine with 62V but you will get better performance with a little extra.Quote:
Originally Posted by Lewywri89
I don't see in the manual re the 134 slaving it just looks like a breakout board for the gecko.
An axis can be cloned but the direction of the clone is the opposite directionso phases need switching Attachment 18510
Ok if you are happy BUT can you home them individually to square the gantry!!!Quote:
Originally Posted by Lewywri89
The 20 times motor voltage is a very rough guide for maximum voltage. If the motor inductance is known, the sqrt of the inductance times 32 is a more accurate voltage.Quote:
Originally Posted by Clive S
Gecko cover it in the power supply section of their stepper motor basics guide - http://www.geckodrive.com/support.html
So 60v - 62v would be the correct size psu? If I use 68v I assume I would have unwanted motor heat?
is anyone in the north west able to make a psu for me for a fee
cant find enough info to buy the parts and build myself
would like a linear psu to minimize electrical noise
Also what amp psu would be sufficient
thanks again
lewis