| Gallery, Projects and General > Project Logs |
| Mini Lathe Upgrades |
| << < (9/16) > >> |
| Stilldrillin:
Nicely/ neatly done Eric! :clap: :clap: :thumbup: David D |
| Brass_Machine:
Put the motor back together, made sure it spun freely and ran back downstairs to test it out. The motor started to spin and POP blew the fuse. Cr@p. Ran to radioshack bought some more. Took the motor back apart. All looked good. Put it back together again and POP again. It will spin for a millisecond and then pop the fuse. Started searching the web as to the reason why... I found this troubleshooting check list from LMS. Figured out I have a busted switch in the POT, but that isn't is causing it to blow the fuse. It has been like that for a while now and I didn't have issues before. It is perm on. I tested the MOSFETs per the PDF. Everything is fine until I get to step 8. It says I should see 120k to 140k. It comes up infinity (1). :zap: Would that let the motor spin for a second and then blow the fuse? :scratch: Eric |
| John Rudd:
Eric, You can test the speed controller with a lamp as a load...Take a household lamp/bulb whatever you guys call them, wire that in place of the motor and see what happens......... Testing the motor....If you have access to a variac, connect the output to a bridge rectifier ( plese take care to connect it properly...) connect the dc out from the rectifier to the motor and see if it spins...Connect a 2 amp fuse in series with one of the leads for protection... :zap: Let us know how you get on...... :thumbup: If you were a bit nearer I'd help more, I've repaired motors and speed controllers for mini lathes before you know... :coffee: |
| Brass_Machine:
--- Quote from: John Rudd on March 13, 2013, 04:02:27 PM ---Eric, You can test the speed controller with a lamp as a load...Take a household lamp/bulb whatever you guys call them, wire that in place of the motor and see what happens......... --- End quote --- I will probably do that tonight. --- Quote ---Testing the motor....If you have access to a variac, connect the output to a bridge rectifier ( plese take care to connect it properly...) connect the dc out from the rectifier to the motor and see if it spins...Connect a 2 amp fuse in series with one of the leads for protection... :zap: --- End quote --- Nope. I don't have access to a variac or even really know what one is :Doh: --- Quote ---Let us know how you get on...... :thumbup: --- End quote --- I will! Eric |
| andyf:
The motor (in the US they are 90V DC) should turn, though slowly, if connected up to a car battery. It will probably draw a fair old current, so best use jump leads. Andy |
| Navigation |
| Message Index |
| Next page |
| Previous page |