Sprint 400 driver board

[dazp1976]

Hello

Can someone help me with the wiring of a Sprint 400 driver board. The manual is here

https://www.sprint-electric.com/wp-c...0_1200-web.pdf

I want to connect it to the spindle on my Denford Micromill. The datasheet gives 4 outputs, two as "armature" and two as "field". I have to admit that I don't really know what these mean or how to identify the four on the spindle. However, when I apply mains power to the board, there is 0V on the "armature" pair, and 200V DC on the "field" pair. If I connect the 10V reference on pin 1 to the input on pin 3, nothing changes. What I need is for the DC output to go from 0 to 90V (the spindle maximum). Would appreciate some guidance

Something sounds amiss. Did you blow yours up or was the drive not supplied in the first place???.


I can't see it happoening myself. The 0-90v units look like they run off 115vac input. (u.s. ver input)
On 230vac input they give you 0-180v (looks like this is what you are finding). (u.k. ver input)

PLEASE NOTE:
There is only one board that puts out 0-90v on a 230vac input and that is the:
KBIC-240DS
This is extremely likely the one you need.
https://www.axiscontrols.co.uk/produ...eed-controller

Who put you onto the sprint???.
The sprint is for the 180v motor types that exist, or the u.s. 90v types.

The official boards are these by the looks of it:
https://www.kbelectronics.com/data_sheets/kbic_oem.pdf
http://www.kbelectronics.com/data_sheets/kbic.pdf
https://www.axiscontrols.co.uk/produ...eed-controller


(sounds like the motor would be the u.s. standard one and they threw a quick fix board in for u.k voltages if you weren't given the control).

There's 3 options here.
1. you find a 180v motor for it.
2. have to resort to the buying the KB control board.
3. get 115Vac input to the sprint 400.

[jolyonjenkins]

Something sounds amiss. Did you blow yours up or was the drive not supplied in the first place???.


I can't see it happoening myself. The 0-90v units look like they run off 115vac input. (u.s. ver)
On 230vac input they give you 0-180v (looks like this is what you are finding). (u.k. ver)

The official boards are these by the looks of it:
https://www.kbelectronics.com/data_sheets/kbic_oem.pdf
http://www.kbelectronics.com/data_sheets/kbic.pdf
https://www.axiscontrols.co.uk/produ...eed-controller

PLEASE NOTE:
There is only one board that puts out 0-90v on a 230vac input and that is the:
KBIC-240DS
This is extremely likely the one you need.

(Initially the motor would be the u.s. standard one and they threw a quick fix board in for u.k voltages). Because it was cheaper!.

There's 3 options here.
1. you find a 180v motor for it.
2. have to resort to the buying the KB control board.
3. get 115Vac input to the sprint 400.

I might have blown mine up. There was a cascade of errors which led to me basically replacing a lot of the electronics.
I got a second hand board from ebay. It looks identical to the original board, and identical to the ones that I've seen in photos of other Denford micromills. The sprint board has a jumper which lets you set the input voltage to 230V (or 110V) so I'm not sure why you think I need the KB driver.

[dazp1976]

I might have blown mine up. There was a cascade of errors which led to me basically replacing a lot of the electronics.
I got a second hand board from ebay. It looks identical to the original board, and identical to the ones that I've seen in photos of other Denford micromills. The sprint board has a jumper which lets you set the input voltage to 230V (or 110V) so I'm not sure why you think I need the KB driver.

Your pdf has a typo. This is the proper one:
https://www.transdrive.co.uk/media/1...200-manual.pdf
The sprint 400 is: 110/240 = 90/180
So: 110v = 90v and 240 = 180v

The switch is just an input voltage selector like on a meanwell power supply.
However. Unlike a meanwell, a speed control is relative to it's input.
So if it gets 240v it'll put out 100%. If it gets 110v it'll only put out 50%.
Ergo 180/90.

Unless you have the actual 180v version motor for it I'm afraid you likely need the KB.
(basically a bodged voltage board worked out cheaper to get u.k. sales)

Yours may look the same to others but they'll likely have the 180v motor too.
Like this:
https://www.ebay.com/itm/393622606533



I may have updated previous post too while you responded.

[jolyonjenkins]

Your pdf has a typo. This is the proper one:
https://www.transdrive.co.uk/media/1...200-manual.pdf
The sprint 400 is: 110/240 = 90/180
So: 110v = 90v and 240 = 180v

The switch is just an input voltage selector like on a meanwell power supply.
However. Unlike a meanwell, a speed control is relative to it's input.
So if it gets 240v it'll put out 100%. If it gets 110v it'll only put out 50%.
Ergo 180/90.

Unless you have the actual 180v version motor for it I'm afraid you likely need the KB.
(basically a bodged voltage board worked out cheaper to get u.k. sales)

Yours may look the same to others but they'll likely have the 180v motor too.
Like this:
https://www.ebay.com/itm/393622606533



I may have updated previous post too while you responded.

Ah, this might explain why I can only get 100V out of it. Hmm. There do seem to be fairly cheap PWM DC-DC controllers on Ebay which I could maybe bolt on

[dazp1976]

Ah, this might explain why I can only get 100V out of it. Hmm. There do seem to be fairly cheap PWM DC-DC controllers on Ebay which I could maybe bolt on

Did you have it running before?.
Did you plug it in and pretty much blow the lot by any chance?.

Everything I look into so far is showing me schematics with 110v input.

This suggests to me that there should be a 220v-110v transformer in there for use with u.k. supply.

[dazp1976]

Did you have it running before?.
Did you plug it in and pretty much blow the lot by any chance?.
Everything I look into so far is showing me schematics with 110v input.
This suggests to me that there should be a 220v-110v transformer in there for use with u.k. supply.

Okay so. From what I said previously.

On this Denford data page in the 4th post down:
https://www.denfordata.com/bb/viewtopic.php?f=36&t=2929
The schematic shows the 'power transformer' which converts u.k. 240vac into 110vac for the machine.

Micromill-electrical-feb-2000.pdf
https://www.denfordata.com/bb/download/file.php?id=2796
Micromill-denstep-electrical-June2000.pdf
https://www.denfordata.com/bb/download/file.php?id=2795

Look for this in your machine. Could be the overall culprit.