Messages

121

General Mach Discussion / Re: CS Labs CSMIO/P-A

« on: August 02, 2018, 04:52:18 PM »

Hi Hood

The Norwin Drives were putting 108v to the motors. The max speed according to the Denford Manual was 5M Minute and ball screws have a 5mm pitch. Where did you find the info from the screenshot? I can't find some of those part numbers.

Cheers
Mick

122

General Mach Discussion / Re: CS Labs CSMIO/P-A

« on: August 02, 2018, 04:29:53 PM »

Hood Craig

Thank you for your time again. Definitely gonna go for the AC servos and drives.

Craig
Great explanation of how you got to the 900watts. This makes much more sense now!

Can't believe the resolution on the modern encoders.

I can see what you mean now when you said 10,000 line was entry level.

Cheers
Mick

 

123

General Mach Discussion / Re: CS Labs CSMIO/P-A

« on: August 02, 2018, 11:48:53 AM »

Hi Hood

I can go up to a 1kw motor as it won't make much difference on the price. If so should the drive be increased to the 1.5kw or is it ok to use the same size drive. I have attached a picture of the Sem motor plate.
Great to hear from you again.

Cheers
Mick

124

General Mach Discussion / Re: CS Labs CSMIO/P-A

« on: August 02, 2018, 10:46:01 AM »

Hi All

Thanks Hood.

Just been looking at the Lexium 28 with BCH2 motors from Telemecanique.
  
I can get this 1kw drive for £221 inc vat. https://uk.rs-online.com/web/p/servo-drives-controls/1110812/

The 750w servo motors for £138.00 inc vat   https://uk.rs-online.com/web/p/servo-motors/1110822/?sra=pmpn

I think its a no-brainer really as far as switching to Ac servos.

Craig

You suggested in your previous post my Sem motors were probably rated at around 900watts continuous. Could you have a look at the link above to see if you think that particular motor may be suitable?

Cheers
Mick

125

General Mach Discussion / Re: CS Labs CSMIO/P-A

« on: August 02, 2018, 08:26:38 AM »

Thanks Craig for the info.

Hood

What Telemecanique drives are you using? The reason I ask is my wife works for Schneider Electric and we can buy any of there products at cost.

Cheers
Mick

126

General Mach Discussion / Re: CS Labs CSMIO/P-A

« on: August 01, 2018, 04:32:38 PM »

Hi Craig

Are you using an Allen Bradley motor to match your drive?

Cheers
Mick

127

General Mach Discussion / Re: CS Labs CSMIO/P-A

« on: August 01, 2018, 01:52:39 PM »

Hi Both

Thanks for all the info. I will work some costing out for both drives. As far as sizing the motors to what I have. The specs in the manual for the Sem motors doesn't give any KW rating. If I go off the motor plate its states at 130v the motor will turn at 4000rpm and demand 37amp.
This works out to 4.8kw??? Surely my calculations are not right. When the motors we are talking about are around 700 watts.

Allan

Where did you buy the Kinko drives.? Are you using Kinko Motors?

Cheers

Mick

128

General Mach Discussion / Re: CS Labs CSMIO/P-A

« on: July 31, 2018, 04:35:27 PM »

Hi Allan

 Thanks for that info and great to know I can still use the CSMIO. I have emailed Norwin and asked them to repair the drive anyway. I can't sell a drive that doesn't work. Yes, I agree that the CSMIO is an industry standard 24v controller that is not open to the elements which is another reason I liked it.

If I decided to go down the AC route what drivers and motors would be a good choice? Craig has mentioned some possibilities in previous posts and I will look into those over the next few days.

Cheers
Mick

129

General Mach Discussion / Re: CS Labs CSMIO/P-A

« on: July 31, 2018, 02:50:21 PM »

Hi Craig

Thank for confirming that we can do without the feedback from the motors. I appreciate that you had said this before but please forgive me as I am not anywhere near up to speed with PID loops, servos systems etc. This is something I intend to get more familiar with as I believe you can fix anything if you know how it works.

As far as the CSMIO goes Hindsight is a wonderful thing. The lathe came from a Rolls Royce training facility and had only done 800 hours.

The CSMIO cost me £500 as I can reclaim the Vat and I have just had costings to repair the drive from Norwin for £75. Or I can replace the drives for £100 each.

So my spend so far is £575 or £700 with new drives.

The reasons I chose the CSMIO is because it is well respected by loads of very knowledgeable people on the forum and is distributed throughout the Uk by several CNC specialists.
It also has the ability to deal with threading which in my experience is difficult to get right with Mach 3.
Changing the servos would also mean that additional power supplies would be needed. Mounting plates would also have to be made and belts replaced. Then you have the issue of matching the new servos to the old ones as far as torque etc. Are the servos you've mentioned equivalent to what I would be taking off? 

If this is the wrong route I will replace the drives and Motors with new. Not something I want to do just yet but if I do, someone at some point will be looking for that particular servo motor and pay good money for it.   


Cheers
Mick

 

130

General Mach Discussion / Re: CS Labs CSMIO/P-A

« on: July 31, 2018, 01:16:09 AM »

Hi Allan

I will have a read up on what the KD does in the CSMIO and try and get my head around it. Good to know there are options available without replacing the motors.
Thanks for your time again.

Cheers
Mick