The full cabinet…
Attachment 30502
Printable View
The full cabinet…
Attachment 30502
It's the card inbetween (second from the left) we could do with a photo off.
Oops! Sorry… attached wrong image!
I’ll try again… :)
Attachment 30503
Attachment 30505
…the whole cabinet and rack.
That's handy, they've even marked out what area of the board does :)
First thing I'd be checking, is if the NME0512D (5 to 12V DCDC converter) is outputting 12V.
If it's not, then I'd be checking to see if it's receiving 5VDC.
Beyond that, you really need an oscilloscope to check things.
It's a case of seeing if the opto-isolator is receiving a signal (from that previous thread, the Baldor outputs a PWM signal, which is amplified to drive the opto-isolator), and if the opto-isolator is switching it's output. It's a case of working through the circuitry to see where you are, and are not getting the required signals.
Off course, the problem is doing all that while the card is installed in the rack.
I'd probably solder on jumper wires to test the key points (8 wires - both sides of DCDC converter, and opto) to establish at least what side of the isolation is at fault.
Hi all - thanks for the help & support in identifying the issue with the spindle drive 👍🏻
I sent the drive to Sprint, who were super-helpful by the way, for investigation prior to repair or replacement.
It proved not cost effective to repair and the 1600i was recommended as the replacement.
A couple of hours making up a new mount (as it’s bigger than the 1200) and wiring in and we were in business!
No ‘rogue behaviour’ from the spindle on boot up and no tripping the power!
I’m still apprehensive about wiring into the mint board, in case that’s what killed the old 1200.
So I’ve wired in a 10k pot across #1 & #3 on the board.
This controls the spindle rpm, but I’ve still got an issue in that I don’t get full range.. by ‘educated guess’ (uncalibrated 😉) I reckon I’ve got 3krpm - 4krpm… but no lower.
I’ve played with the minimum and maximum rpm’s, but still stuck at the minute.
I’ll get in touch with Sprint, but anyone retrofitted a 1600 or 1600i spindle drive?
Thanks
What is the rated speed of the motor?
I seem to think the original motors were rated at 3000RPM.
As long as the sprint drive is outputting the rated motor voltage, then everything is doing what it should be, as with DC motors, Speed is directly proportional to Voltage.
Attachment 30577
4000rpm
The bit I don’t get is that the pot is working, but not giving me the range it should.
I guess if I check the voltage output from the board / input at the motor I’ll get an idea if everything is as it should be.
Checking the voltage will give a definitive answer, but I've just realised you said you only wired the pot across 1 and 3. It should be wired to 1, 2 and 3.
Thanks… had this realisation too, and guess what?
Being wired correctly makes it work correctly… who’d have thought it?! ��
Now to sort the comms properly… new post coming shortly…