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Author Topic: A axis setup problems  (Read 4697 times)

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Offline Hood

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Re: A axis setup problems
« Reply #10 on: May 10, 2013, 03:05:12 AM »
If it is the G201 you mentioned earlier then they have a fixed microstepping of 10, so each rev of a 1.8 degree stepper motor will require 2000 pulses.
Hood

Offline RICH

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Re: A axis setup problems
« Reply #11 on: May 10, 2013, 06:39:06 AM »
You can find info on the Gecko site about your G201 drive. You need to set the current on the drive for your stepper by using a resistor.
Step pulse value of 4 should work.

RICH

Offline stirling

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Re: A axis setup problems
« Reply #12 on: May 10, 2013, 07:19:17 AM »
The reason I asked why you'd set the step pulse width to 5 in my first post is that you don't need to change it from the default 0 as far as the G201 is concerned.

The 201 steps on the falling edge and its min hold time is 0.5us. The Step Pulse setting in motor tuning is NOT the step pulse width, it's the time you want to ADD to the stock step pulse width that Mach puts out. Art says somewhere in one of his vids that this is between 1 and 2 us - so already 2 to 4 times greater than that needed for the 201.

However - You don't say anything about your BOB (if you use one). Some BOBs have Slooooooow optos and if so these can require longer step pulses from Mach. (one of the reasons I don't use BOBs).

You don't say what the current requirement is of your system BEFORE adding the 4th axis so whether the 4th is taking it over the limit of your PS is not possible to say.

All that said: you say in reply #9 that your power supply is 23Vdc. Chopper drives will not work below a "certain" voltage and the 201's min is 24Vdc so that could well be an issue.

EDIT: forgot to add that your 3.8mH motors "ideal" voltage for torque at speed is 62Vdc so in that respect also your power supply is not a good match.

Ian

« Last Edit: May 10, 2013, 07:33:25 AM by stirling »
Re: A axis setup problems
« Reply #13 on: October 13, 2013, 12:08:36 PM »
Hello again,
It's been a busy summer but I'm back working on my router again.

I purchased a new power supply; 50V 300VA.

http://www.antekinc.com/details.php?p=696

The problem I'm now having is that I keep blowing fuses on my router.

Where the 110 plugs in there is a little compartment that has a small fuse in it 5A and it keeps blowing.

Any ideas?



"Ideas have consequence" Ravi Zaccharias