ramp .. ramp ... ramp.

[prrraveen]

Open issues :-

• How many Ardunio Mega does it actually use? How many pins are left to use for other purposes?
• How to power RAMP circuit?
• Can we use unregulated power source? If yes then making one would be easy.
• Can we use existing SMPS?
• What are the drivers compatible with RAMP? Availability. power rating and price?
• Can We use Accelstepper code on for RAMP
• Can I use motors on unipolar configuration.
• Is it going to bring the cost down? :-p

[prrraveen]

How many Ardunio Mega does it actually use? How many pins are left to use for other purposes?
As per this discussion, There are more than 10 pins available to use.

[prrraveen]

How to power RAMP circuit

We need to find an computer shop to get old ATX power source.
It will have 12V -5 Amps rating.

I would like to use 24 volts since it is going to give torque. but It will addup to the cost.
Lets see if ATX is sufficient.
Here are the steps to modify ATX for using it in RAMP

[prrraveen]

Can we use unregulated power source? If yes then making one would be easy.
We don't need to if we are going with ATX. the whole point was to find inexpensive power source

[prrraveen]

Can we use existing SMPS?
USE ATX

[prrraveen]

What are the drivers compatible with RAMP? Availability. power rating and price?
here is comprehensive list of driver that are compatible. Lets try to stick with TI drivers. current rating is high.

read more on this
https://farmbot-genesis.readme.io/docs/assemble-the-electronics-box
DRV8825 Stepper Drivers; we also need to use heat sink.
It will cost 150.
we will call up some local sellers. we will save 100 on each peace.

[prrraveen]

Can We use Accelstepper code on for RAMP?
From a brief examination, Its totally possible 💯
http://forums.reprap.org/read.php?219,166111

[prrraveen]

Can I use motors on unipolar configuration.

highly unlikely

[prrraveen]

Is it going to bring the cost down?

I don't think it fare to add Ardunio Mega cost since we were buying it anyways.
Apart from that.
500 from RAMP
200 fro ATX power supply
600 for 150 x 4 drivers.

1300 for 4 motors is not bad 🔢 💯

[prrraveen]

@ank27 would you like to add something here ?