Isel CPM 3020 - run with mach3?

[limpet]

Limpet First welcome to the forum. Not sure what you are saying here. Have you read the op's problem if you look back he says his power supply is only 24V regulated and is asking what power supply and drives to get so as to get a decent running system. I think he has been advise to get some digital drives and about 45V unregulated power supply.

Hi Clive and thanks for the welcome.
Sorry I could have been clearer.
I was just saying that if he`s creating his own unregulated PSU then a nominal output of 45v with no load could drop to below 40v under load and if he goes for a 45v output under load then the PSU may well give more than 50v without a load which may be too much voltage for his drives. I`m not sure what protection they have.
This may or may not be an issue, but I thought I would just point out the possibility.
I apologise if I`ve clouded the issue, that was not my intention.

I`m no electronics expert but that is my experience with power supplies.

[craynerd]

Anyone lend advice regarding limit switches and homing.

I I have two limit switches at the extreme of each axis, so 6 switches in total. Considering I'll have spindle input on off, touch plate probe etc, am I best putting all limits in series on one pin?

Im still confused by home switches. I don't see why you need a home and you can't just hit the limit switches as a corner home. Or even hit the limit switches for position and then find a software based home. I must be missing something. Also, most people seem to home to the centre of the bed. What is the best way to mount these switches and have them triggered as I guess they will mechanically get triggered a lot when the machine is actually in action?

Cheers

[komatias]

limit switches can be home switches and they can all be put in series. Once the machine homes, you can tell it to move to a predefined distance from the switches. On gantry machines where you need to home both sides of the gantry, it is best to have separate pins for each side of the gantry. In your case, it is up to you.

Have you read the Mach3 Manual yet?

[Clive S]

I must be missing something. Also, most people seem to home to the centre of the bed. What is the best way to mount these switches and have them triggered as I guess they will mechanically get triggered a lot when the machine is actually in action?

Chris. Can you say where you are getting this info from because it certainly is not from this forum. I am sorry but I feel like I don't want to answer any more questions as you don't want to give any feed back on the answers you have had thus far. ( ie what did you do with the power supply etc) as that sort of info helps others.

[craynerd]

Feedback:
digital drives cwd556
cant afford ip-m so have gone for KK01 BOB
will upgrade to ESS next pay day but will get it moving on this.

power supply - currently using the 29v supply after learning how to get it all back together again. This will be upgraded to a new cap and transformer for a bigger supply when I can afford it.

Currently the machine is running and I'm pleased I've got this far. I'd like to wire up the limits and home then it's on to spending money for motion control and supply.

Information regarding homing was off YouTube, move vids seem to home to the centre.

[AndrewMawson]

Anyone lend advice regarding limit switches and homing.

I I have two limit switches at the extreme of each axis, so 6 switches in total. Considering I'll have spindle input on off, touch plate probe etc, am I best putting all limits in series on one pin?

Im still confused by home switches. I don't see why you need a home and you can't just hit the limit switches as a corner home. Or even hit the limit switches for position and then find a software based home. I must be missing something. Also, most people seem to home to the centre of the bed. What is the best way to mount these switches and have them triggered as I guess they will mechanically get triggered a lot when the machine is actually in action?

Cheers

On a full size 'proper' cnc machine the limit switches will lock out the controller until someone with nouce can determine if it is safe to re-set them.

Remember you are playing with tiddly little stuff, but a full size machine can have several kilowatts of axis drive power that can shift things pretty fast and do very much damage.

On my Beaver Partsmaster the previous owner screwed up the Y limit switch setting, and it had managed to destroy a VERY expensive 40 mm ball screw and nut - if only those students hadn't fiddled ! (ex Bristol University)

On my Traub lathe the mass of the tool turret and slide mechanism is huge with servo drives of commensurate size - you don't mess with the limits on those unless you have very deep pockets

Good practise dictate that you have separate limit and home switches

[craynerd]

https://youtu.be/aBahgG8YzK0




The cnc machine is now up and running. I`m blown away with how fast and how accurate it is and how well it did with a 4mm cut depth in brass cutting some text.

It has no motion control on it yet and just the 25v supply.

[philippe_007]

Hi Chris,

I hace buy a ISEL CPM 4030 this week without software.
Looking how I can use the CNC I found your topic, very interesting.

Can you send me more details about what you changed on the Milling machine to let it work?

Saturday I get the CNC and I can look the internal components.

Regards,
Philippe

[nobby]

did you wire the 8 wire motors b polar parallel

[Leadhead]

I have a full licenced copy of the KAY software for sale including the instruction manual. This will enable you to feed the machine from most any Cam system with an "Isel" post processor. E.g. Fusion 360, Estlecam etc.
Let me know if you would be interested