Simple Powerful Drive

[smarbaga]

This drive should be able to handle 10 Amps per phase
If people think they can use something like this i will lay out a pcb
and get a price kit or assembled and tested.
i have been using a similar one ( with an older processor for 15 years now)

[smarbaga]

i don't see the image in my posting.
how does one get an image there ?
humm, i don't see the vote box either.
i can program in machine language
101010101011 A6D8FF0CCB9
but can't figure this out

[abasir]

Image needs to be .bmp, .gif or .jpg. PDF file won't show up as image, only link.

[smarbaga]

thank you abasir, perhaps someone should chande the faq statememt on here as pdf's are on the list.

[CNCgr]

Is it a chopper drive?

[smarbaga]

when u tell it to step it steps , a chopper cct if needed and ramping and current limiting would be in your power supply.
as these effects are controling the power, i think this is where these circuits should be anyways.
i could chop the fets in software,

[CNCgr]

Originally Posted by smarbaga when u tell it to step it steps , a chopper cct if needed and ramping and current limiting would be in your power supply. as these effects are controling the power, i think this is where these circuits should be anyways.

Thanks. The board I'm using doesn't have it. So I guess I can add it on the PS? How could I do that, any links?

[smarbaga]

you could have a mosfet(s) turned on and off in the common power line to your motor phases.
the fets could be controled by the drive input step signal.
a simple 555 timer give you a manual adjustable pulse width, (pwm, pulse width modulation) about 7 components, if u r an electronics guy
i think a chopping cct would only be used if the motors rated voltage and/or current is exceeded to give you more rpm's. if the power is chopped when the motor is stopped you will loose holding power.
unless the voltage and chopper on time are matched for a given motor the motor may get real hot or loose power.

[zoltan]

smarbaga,

Do you have the firmware? Are you going to share it with us?

[smarbaga]

i have the software, and sure i will share it, i have to order some of those pics
and i can write the software in 3 or 4 hours and another 3-4 hours when the prototype is done, probably in 3 or 4 weeks( vacation... yeh yeh yeh )
i'll try to display the schematic and pcb again..... i am doing what the instructions say here..... well here goes ...

[zoltan]

Please, let me know when the firmware is available. I am interested to test your board. you said that it is doing microstepping, isn't it?

[smarbaga]

yes, i was planning to have it do full and half steps would u say microstepping in 1/4 or 1/8 steps or something like that, and i will let u know when i have the new pic's and programmed.
btw the mosfets are IRLZ44's ... (ttl level gating) as irfz's take 10v to turn on