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is it possible
framey:
does anyone know if it possible wire to run a cl300m without the circuit board at £80 a pop these things get expensive lol
ideally id like to keep the variable speed on it
raynerd:
I`m sure many more suitable answers will come your way but ....
I`ve never taken the circuit or motor off my clarke lathe but I imagine it is certainly possible to run the motor just wiring it up direct - that being said, without any controller circuit you are not going to have any controls over the motor speed and all safety aspects of the e-stop will be lost. HossMachines did not want to pay the money for a controller in the USA so he hacked up the controller board from a tread mill and that worked perfectly. Link and pics below:
http://www.hossmachine.info/projects_3.html
that being said, personally not knowing very much about electronics, I wouldn`t have a damn clue where to start and would have to opt into spending the £80 if I wanted the variable speeds and full functionality! However, even if I was good at electronics I don`t happen to have a tread mill or similar lying around ...
Unless you can build your own? :
Darren:
--- Quote from: craynerd on June 24, 2009, 05:36:13 PM ---
I`ve never taken the circuit or motor off my clarke lathe but I imagine it is certainly possible to run the motor just wiring it up
--- End quote ---
Er...in short no,
cos I believe they are 110V DC motors. They won't like our mains very much Chris.
Simply and bombproof forget electronics....though it can be done easily there is a simpler and more reliable way.
240 mains - Variac -240/100V transformer - rectifier = DC 0-110V
Simple.....people try too hard.... :lol:
You could omit the transformer if you put a limit stop on the variac to prevent turning it too high.
raynerd:
--- Quote from: Darren on June 24, 2009, 05:46:41 PM ---
Er...in short no,
cos I believe they are 110V DC motors. They won't like our mains very much Chris.
--- End quote ---
Ahh sure sure!
I don`t really need to get tangled in this topic but I`m curious as this is my lathe should I ever get in the situation.... so your saying that if you hooked our 240v mains to an variable autotransformer, step down the voltage to 120v and simply directly connect to motor?
Am I right in saying that this would just run the motor at a constant speed (top speed at 120v) and therefore could you incorperate a pot someone to adjust speed? and a Safety stop?
Anyway, seems a heck of a lot easier way than hacking a tread mill circuit to suit your needs. I presume as well that the transformer and required odds and ends would work out cheaper than a replacement board.
Thanks again, Darren and Framey, hope you get the clarke cl300m back up a running - still really impressed with my little lathe. Let me know how you get on and what you decide to do.
Chris
Darren:
Variac with DC output, all you need....just put a stop on it to limit output to 110V and that's it...some can be linked internally to limit output so no stop needed.
This sold for a tenner on Ebay
240V 2A input, so output at 110V could be 4A, I believe that's big enough.....
http://cgi.ebay.co.uk/Variac-240v-2A-with-Rectifier-AC-DC-possibilities_W0QQitemZ290322677835QQcmdZViewItemQQptZLH_DefaultDomain_3?hash=item439894804b&_trksid=p3286.c0.m14&_trkparms=65%3A13%7C66%3A2%7C39%3A1%7C240%3A1318%7C301%3A0%7C293%3A1%7C294%3A50
All done for £10....
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