DIY Jobo/Bessler/Cibacrome style roller motor base?

[thomas ciulei]

Sounds like a good idea. I was thinking of a electrical light dimmer switch yo control the power output.. But I am not sure how a motor will respond to that. Perhaps the motor also needs to be of certain type?

seems to me that the spin direction can only be changed within the 12v DC current driving the motor,
and not within the main 110/220V circuit.

I got an old Simaroller, spinning only in one direction.
It was designed for Paper, hence its size for 12x16in/30x40cm.
Id love to make it spin both ways. i usually lift the drum up every 30 sec and switch directions manually.
lovering the imput voltage makes motor suddenly stop.

good thread

[WayneStevenson]

I have an old AC/DC controller for toy train sets that I had when I was a child. I still use it from time to time on DC motors. I can set the voltage / speed with a little dial, and with the flick of a switch, the polarity changes to reverse the direction of the motor.

Perhaps that may give you ideas.

[koh303]

There are already a plethora of products already in existence that do all you want and more.

The CPE2+ not only rotates and reversed via an electronic IC board, but also has a built in heater with .01 degree accurate thermostat to help maintain higher temps needed for c-41\E-6. When coupled with a lift this machine makes for a very clean and dry work area. Another neat thing is that the motor in that machine is commonly used auto industry motor that can be found used for 50-60$, and new ones are not much more, though these motors die fairly rarely...
With enough silicone\glue you can adapt a magnet base to pretty much any type of drum out there if you are not one for Jobo system tanks.

[domaz]

Any ideas for AC (220-250)? I would prefer for it not to be software driven. The old turn knob for rotational speed, switch for on/of change of pin direction, turn knob for frequency of change in spin direction.

I would stay with DC if water is involved. Less chance of deadly shock.

[jcoldslabs]

Which motor base did you burn out? I've been using a Uniroller 352 reversing base for years with no issues. To be fair I'm not using huge drums with it, but it has been a solid performer.

Jonathan

[ic-racer]

If you want a more robust motor you could rig up something like this with a belt drive.

[polyglot]

If you want electrically reversible, DC is the simplest option by far. For reversing, you just need a DPDT relay that will allow you to flip the contacts around to reverse the polarity of the motor.

Easiest source of grunty DC gearmotors is probably windscreen wiper motors from the wreckers - designed to run on 12V, so you can use an old PC power supply ($5?) to drive it.

For speed control, the easiest way is to buy an off-the-shelf radio-control speed controller - look for "ESC" on eBay ($15) but not for a brushless motor, they're very different. ESCs typically have a pulse-width-modulated servo input, which means they can be controlled with a 555 oscillator, with motor speed (servo duty cycle) set with a potentiometer/knob. Google for "555 servo" to get some schematics.

[pjbc]

Why don't you use an electric screwdriver, something like this:

(http://www.blackanddecker.com/power-tools/PD400LG.aspx)

You already have speed and rotation control!

[patrickjames]

I have a Beseler color base that I rewired so the secondary switch in front controls the direction instead of just switching between continuous and reverse. I use a Jobo 3010 on top of it. Works fine. I think it spins a little slower than a Jobo processor, maybe something like 25-30 revs/minute. I am just throwing it out there for anyone who wants something like it. It was easy to do.

[l2oBiN]

Has anyone made any progress on this?