Oh my, Sorry, I did not notice that you had no 5V power to the nano.
I don’t know how this worked at all?
After you made the upgrades:
- Did the Nano connect via USB?
- Did your carriage move at all?
When I drew the conversion diagram above we did not know the 5V capacity for this style LPS. Most of these use a LM7805 which can source 1A, we assumed that was the capacity.
I looked around again and this time found a spec: 5V@ 20MA
It may be that my original drawing was flawed, or at best marginal. I am pretty sure it worked but I would not chance it. Poor supply capacity can cause a myriad of headaches.
I seriously doubt 20ma is enough to run the Nano properly.
These are the changes I recommend:
Insure all grounds are connected together including: 24V, 5V*, 12V*, LPS, Nano. [*if installed]
Add a 5V supply for the Nano. I would go for 3-5Amps. 1A is the stock supply source for the nano. Insure its ground is connected to the other grounds.
You can use one of these approaches:
Add a 5V buck converter to the 24V. There are many choices on amazon. Something like: https://amzn.to/3bMtvCa. I generally don’t like buck converters on logic boards because if they aren’t good designs they are noisy. It also depends on the capacity of your 24V supply? They really aren’t that much cheaper anyway. $12.5
Add a separate 5V supply: Lots of choices on amazon like this one: https://amzn.to/38P5QPq $12.5
Add a dual supply: Again, lots of choices on Amazon. This is a reputable supply maker and you get all three voltages 5,12,24 in the same supply. I use 12V alot for accessories. https://amzn.to/3qoJrhS $23
Where does the wire (TO STEPPER MOTORS) go. Its at the bottom of your diagram and comes from -24V.
- I would suggest amending your diagram adding your choice of 5V supply and then post here to review it before you purchase.
- Purchase power supply
- Install power supply and check wiring
- After installation we should do DC measurements to verify the install.
- Do you have a DVM and do you know how to operate it?
When you are done making the changes power up and please complete the table below.
Measure all these voltages with the ground lead of the meter on the same ground point.
Meter set to measure DC volts.
To Fill in the table:
If you highlight the table in this post
Then click “quote”
A post will open with the tables formatting in place
Just change the values of the “x’s” to your measured values
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