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Help with electronics design

Started by bruce29, August 20, 2021, 02:39:42 PM

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bruce29

I am repairing my sawmill after recovery of  it, after it was stolen. A lot of wiring etc was damaged.  My sawhead is powered up and down by a 12 volt d.c. gear motor. I have a momentary toggle switch to control it. I would like to have a up /down lever like  a Wood-Mizer Type setup I know Wood-Mizer just use a drum switch . I want a variable speed in both directions . I have found reversing variable speed motor controllers that are rated 60-70 amps, which is good. I don't know what type of lever style switch  (potentiometer ) and other components I would need to accomplish this. Any help would be great appreciated.

jrsloan1

I have no idea if this will help, I have a woodmaster planer which has a reversing switch/lever. It is only reverses the direction, not the speed. There is a separate pot switch for that. 
Never trust nobody cause you can't fix stupid!!!

Nebraska

This is just a sorry since I have no useful information for your build.... but glad you have it back, a few of us had a pretty good time with it's adventures though.  :)

bruce29

Yeah I typed out the whole story twice but when I went to post it somehow deleted it both times. Couldn't force my self to type it out again but did enjoy reading all the adventures that everyone added to . The real story was almost as good .

mike_belben

make sure your are logged in permanently, and not just 60 minutes.  also select all/copy when youre doing a long post.  i find its better to write long ones in notepad and then copy paste to browser so you dont lose all your spaces. or the whole post. 
Praise The Lord

fluidpowerpro

I recently did something similar to my saw. I set the speed on the pot that came with the amp, and control F-W with the switch that came with the winch. It works pretty good except if the pot is turned down too low, then it does not have enough power to move the saw. 
The amp your describing is probably just like the one I used. I comes with a pot and a forward - reverse switch already. The pot also acts as an on-off switch. 
I'm no expert but I think:
1. You will need to determine the range of the pot that came with the PWM amplifier. ie 0-10k, 0-100k.... This will tell you what range the drum switch/pot needs to be.
2. You will need to figure out what wire is what on the existing pot. It probably has 5 wires. 3 are for the pot function and 2 are for the on off function. 
3. Once you ID the wires, hopefully you can figure out drum switch/pot. If the drum switch/pot does not control on-off, then I would think you could control that with a toggle switch separately.

Not sure if I helped at all...

br>
 

 

 
Change is hard....
Especially when a jar full of it falls off the top shelf and hits your head!

Local wind direction is determined by how I park my mill.

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