[hiyata99]

Hi all, I'm brand spanking new here and came across this incredible forum whilst looking for a solution for my problem. I'm hoping someone can shed some light on this for me.

I just bought a HF 7x12 mini lathe for my department so that we can make some custom parts and turn down fittings. It also doesn't hurt that I've always been interested in learning.

The problem is that once the lathe was unboxed and slightly de-gooped, I read over the directions and plugged her in and set all the switches and dials to the exact postion the directions stated. Basically they ask that :

the speed dial be turned down bast "0" turned off. (it does click to the off position).
Turn power switch on. (It does light up.)
Set direction from neutral to forward.
Slowly advance dial to desired speed.

When I do this the chuck spins very quickly in about 3 or 4 bursts or pulses then it stops.

Does anyone have any idea what is going on?

The gearing seems to be OK but I can't seem to figure out why this is happening unless there is a bad electronic board.

Any help would be most welcome and appreciated.

Thanks,
G

[Al_The_Man]

Sounds like the current limit pot need adjusting.
Al.

[hiyata99]

Thank you Al,

How difficult of an operation is that?

I'm not an electronics genius but I have done my share of simple debugging and soldering. Turning a little pot doesn't sound to dfficult however it there is potential to screw it up I might just be better off sending this puppy back. Luckily I have a HF outlet located in my immediate vicinity.

[Al_The_Man]

If it is the pot, presumably they do not send them out tested?
If you can locate the pot, just turn it up slowly until the motor smooths out.
Al.

[blades]

Does it do this in reverse also? I'd exchange it, if you have the luxury of time (if they don't already have another one in stock).

[TroyO]

I knew I had seen something like this before, and just ran in to it again so I figured I'd cross post it.

http://www.modelbrasscannon.com/ServiceManual.pdf

It's geared towards the mill I think, but the boards are similar/maybe identical? Anyway.. maybe it will help.