Messages

111

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

« on: August 05, 2018, 07:44:26 AM »

Hi Craig

I was looking more so up to 2000rpm where they look very similar. Yes, there is a big difference at 3000rpm. Would these motors perform the same under 2000rpm?

Cheers

112

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

« on: August 05, 2018, 07:07:41 AM »

Justed looked at the Schneider BCH2MM152 1.5kw servo. Looking at the torque graphs it appears to only be marginally behind the 3kw Allen Bradley one. Obviously, this can't be right with half the power?

Craig
I already have the phase converter which I purchased a couple of years ago. It happily powers the 6kw spindle motor on the lathe. My preference would be not to use it and have everything single phase. If I come to sell the lathe in the future it will more than likely go to a hobbiest who wouldn't have 3 phase.

Cheers
Mick

113

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

« on: August 05, 2018, 05:38:25 AM »

Hi Craig Hood

You pair are unreal. Wish I had 1% of your knowledge. Need to have a good read through all the posts and look at the motors and drives your quoting.

Cheers
Mick

 

114

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

« on: August 04, 2018, 02:44:29 PM »

Hood

The motor is original I think which is capable of 6000 rpm at 205hz. The VFD was a cd500 which I replaced with a Jaguar VXM 550 when it gave up. Just thinking ahead really. Would be nice just to get the new AC  axis drives installed and working as they should. Then look at the possibility of C axis.
I believe there are other options available instead of just replacing the spindle motor like a secondary servo for accurate positioning of the spindle? The 3 phase is a bugbear and would restrict saleability to the hobbyist but need to put that on one side for now.  

Cheers
Mick

115

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

« on: August 04, 2018, 07:27:22 AM »

Hi Craig

These motors do look good if not better than the Schneider ones but with Schneider only being 30 minutes from me and probably being able to get better support as they are new, I will go for the Schneider ones.
They will be more than enough for what I need and like you said a massive improvement on the DC drives. I will order the cables with the drives as suggested.

Slightly off topic, I have a huge 5.5kw spindle motor on the lathe at the moment. It's 30-year old which may explain the size. It's a three-phase motor which is a pain to be honest as I have to run it off a 3 phase digital inverter which cost me £1200 a couple of years ago. Would really like to have everything single phase and thinking of maybe using a servo on the spindle which would allow a fourth axis at some point. The Schneider single phase servos only go up to 1.5kw and 2000rpm. Is this a not starter if not using 3 phase?   
I have attached a picture of the motor plate.

Cheers
Mick

116

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

« on: August 03, 2018, 05:34:36 PM »

Cheers Hood

117

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

« on: August 03, 2018, 05:14:18 PM »

Hood

Thanks for the detailed explanation and time taken. I have got all this info but hard to syphon through with lack of experience. What would be a better choice the high or low inertia?

Cheers
Mick

118

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

« on: August 03, 2018, 04:26:57 PM »

Hi Craig

Thanks for the links but makes no sense to me to buy used motors when I can get branded stuff at such a great price.

Think I will definitely go for the smaller motors and yes I don't need 15m/min, half that is plenty. What are your thoughts on the two different models? High and low inertia. I have tried reading up on it but a little bit over my head. 

Cheers
Mick

119

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

« on: August 03, 2018, 02:38:44 PM »

Hi Craig

I was going to use a smaller sprocket on the motor. They are belt driven at the moment.

The two motors I was referring to will fit no problem. Just need to get a plate made. The motor I was going to get was a 1kw BCH2MM102∙C∙6C. The Circle diameter of the mounting holes is 145mm. Which will not be a pretty fit on the x-axis.
I think we have established that motors BCH2LF073∙C∙5C or the BCH2LF073∙C∙5C are close to spec but Hood suggested slightly underpowered. Hence why I was thinking of gearing down as I don't need 3000 rpm on rapids.  

I can send you links to the motors if you wish.

Cheers
Mick

120

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

« on: August 03, 2018, 01:19:10 PM »

Hi Hood

Thanks for the link. We have no gearing on the motors. It's 1:1 ratio. I presume the OT control restricted the max rpm to limit the axis speed to 5m Min I have a slight problem with the BCH2MM102∙C∙6C motor as the flange size is too big for the X-axis. I could get it to fit on the Z axis but still a bit tight.

If I use the BCH2LF073∙C∙5C or the BCH2LF073∙C∙5C and gear down 2:1 I believe this will double the torque? Which would be above the Sem motors as you suggested in a previous post. That will give me an axis speed of 7.5 M min well above what I require. Does that sound about right or would you suggest something different? 

I have noticed there is only an option for the High and Low inertia on that motor. What would be the better option?

Cheers
Mick