The Shop > Tools
Isel CPM3020 cnc machine - electronics rebuild
Bluechip:
Why should it ????? :scratch: They are full-load RMS AC voltages.
If you connect Sek2 from bl-bl @ 20.9VAC I would expect that to FW rectify to 29.8 VDC ish with a capacitor.
Multiply by SQRT 2 ie. 1.414 ...
If that is what you are doing ... not enough info really.
Dave
philf:
Hi Chris,
The important winding is the 20.91v at 6a. If you rectify that with a bridge and put a big capacitor in you should get something like 30v which is better than 24v but 36v would be better still.
It would be OK for starters but if you want speed you may struggle. Also, if you've got three 4.2a stepper motors there may not be enough current if all three motors drive at the same time.
Phil.
raynerd:
Thank you, makes sense now,
raynerd:
Can anyone give me a little advice on home switches and limit switches.
My machine has 6 limits, 2 on each axis. I understand that to save inputs, most people wire them all in series. Obviously. You can't see that way which one has been triggered but inspecting the machine will make it obvious. What I then don't understand is why if you have limit switches, why home switches would be needed. Surely if you track back to your limits you could then move to a software "home" just like you can have soft limits. Also, a lot of people seem to home to the centre of the bed. Won't the limit switches keep getting triggered during general milling - they may be ignored by the software but it is this ok on the hardware side?
I'm obviously missing something... Help appreciated.
awemawson:
Limit switches should be just that : an absolute limit to travel in that axis direction to save the mechanics and electronics if something goes wrong.
Home switches perform a totally different function : they give the software a reference point as to where the machine is for setting up purposes
Navigation
[0] Message Index
[#] Next page
[*] Previous page
Go to full version