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Hi mark I sent you an email to the email address in your last post

Hi Mark I don't know if I can still find it but I used to have a printed version of this manual and I also have 3-4 of these drives that you can have if you if you want to pay the shipping on them I...

Hi Steve thanks for the reply its funny you should mention ruining a rectifier thats just what I did last night . It was 35 amps 200v the person I bought them from
has some other ones that are 50...

Thanks Guys for the help I think I sized my cap wrong in the first place I'm only running two 5 amp steppers off it .
I read an old post here that mentioned a relay to throw the resistor across...

Thanks AL for the help
Would it be possible to ground one side of the variac to ground?
The input and the output share a common terminal couldn't this common terminal be plugged into the...

Hi Guys can anyone tell me what the rules are for sizing a bleed resistor for my home made power supply ? I have a variac for regulating the ac to the bridge rectifier after the rectifier I have a...

Thanks AL that makes sense
Bob

Hi can anybody tell me what a voltage controlled oscillator (VCO ) is and what its used for in a stepper drive ie: [ Pacific Scientific 6415 ] .
Is it beneficial or an uneeded bell or whistle? ...

Hi where can I see a pic of this ncpod ?

Wil thanks for replying
Nice site & nice work looks like fun .That laser system must have set you back a few pennys?
Will it engrave metal too?
Do you mind me asking how much for the complete...

Hi has anybody used their cnc router to do any woodburning work?
Bob

Hey thats an great idea could I mount 2 or more on the same tube?

Hi guys whats the best way to cool a Gecko 201 running motors @ 6 amps
Could i use a cpu fan on the bottom?
Or should I use a peltier cooler and a cpu fan combo ?
Or would just a finned heatsink...

Hi markcomp77 is there a bare pcb available for the bipolar chopper that you listed in post #710? and is 4amp its max amperage?
Bob

Hi Dertsap I was over to stepper world looking at the fet4 withthe mosfets upgrade looks like just the ticket dou you need there software to run your steppers of it? or can you just use Mach?...

thats great I am using mach3 can you tell me how you set up your 299 motors in mach
I'm using a 5/8-8 screw would the steps per rev be 1600?
what about the velocity and acceleration settings can...

dertsap what controller software are you using to run your ph299's?

Great if I wanted to have available 10 amps per stepper x 4 steppers how big of a rectifier and cap would I need?

great these are free so I guess I'll Try it What have i got to loose right?
now if I wanted to get more amperage could I parallel two or three of these together through the same bridge and cap ...

H i I have access to some control transformers 500 watts to 1500 watts
they are 480 primary to 120 secondary this is a 4/1 turns ratio .could I put 120 in on the primary and get 30 out on the...

oh yes by the way what does a single axis gecko cost anyway?

does anybody know if this board would be any good?...

what constitutes a good reliable design? it for me needs to be forgiving to some degree as you can see I'm probably not the most careful person its just my nature I try to follow the rules but I...

what constitutes a good reliable design? it for me needs to be forgiving to some degree as you can see I'm probably not the most careful person its just my nature I try to follow the rules but I...

I went to the link for the steppers but didn't see them listed anywhere

Yes I see what you mean and the good part was there was only 24 volts going to the board and I hadn'T given it any commands yet thanks for the supplier info I'll check that out Bob

Thats a pretty good explanation thanks alot for the help
Bob

well the machine is 40x60 I guess it doesn't matter now anyway I smoked something on my board I set the voltage resistors for 3 amps (.54vdc) as per instructions turned it off let the caps bleed...

Thanks guys for the help .whats the difference between steppers and servos? can a stepper be used on a servo board ? is it just a matter of including an encoder for closed loop ?

Thanks Al would that be bipolar or unipolar and is there a formula for figuring this out Ive got some other old motors with just the voltage and amperage ?
Bob

Hi I bought one of Daves 4 axis unipolar boards It was a breeze to assemble .But now I find out that my motors are to puny I'm trying to turn some 5/8 -8 acme screws in delrin with some old...