Sherline 4345 connection to Sprint drive board

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robertjenkins
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Joined: Fri 16 Apr , 2021 13:28 pm
Hardware/Software: Denford Micromill 2000

Sherline 4345 connection to Sprint drive board

Post by robertjenkins » Wed 08 Dec , 2021 18:36 pm

Hello

I have a Sherline 4345 DC motor from a Micromill, and I need to connect it to a Sprint 400 board. The Sprint has four outputs, two for armature and two for field. The motor itself has 5 wires - red, orange, white, green and black. I have no idea how to connect them. The red and black pair have a resistance of about 7 ohms, the white and orange about 1 ohm. The green doesn't seem to have any continuity with any of the other wires but about 1.5k to the body of the motor. Ideas?
Thanks

Martin
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Re: Sherline 4345 connection to Sprint drive board

Post by Martin » Thu 09 Dec , 2021 9:09 am

The red and black pair have a resistance of about 7 ohms.
Motor Armature
The white and orange about 1 ohm.
Thermal sensor
The green and black.
Earth

robertjenkins
Posts: 16
Joined: Fri 16 Apr , 2021 13:28 pm
Hardware/Software: Denford Micromill 2000

Re: Sherline 4345 connection to Sprint drive board

Post by robertjenkins » Thu 09 Dec , 2021 10:00 am

Great, thank you.
Since my board seems to blow a fuse (or trip the RCD) every time I connect power, would there be any problem with a much simpler set-up:
a step down transformer, bridge rectifier, and relay to switch on and off? I wouldn't be able to vary the speed and direction but that doesn't matter to me much.

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Steve
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Re: Sherline 4345 connection to Sprint drive board

Post by Steve » Tue 14 Dec , 2021 18:26 pm

Hi,

Find attached drawings of how the Sprint drive was connected to the Micromill in 2000
Attachments
Mdc-002a.pdf
(46.61 KiB) Downloaded 28 times
Mdc-001a.pdf
(41.11 KiB) Downloaded 25 times

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