840dsl, gear spindle speed configuration

Hello.

I have the same problem SPEC_CNC. 

My configuration is DC motor with ADI4, Sinamics DCM and Sinumerik 840dsl 

A DC motor mx speed is 2400rpm

We have one encoder on spindl, encoder resolution is 2500

We have 4 gears

1. gear  is S15 - S430  the ratio is 1/5,5777

2. gear  is S23 - S666  the ratio is 1/3,604

3. gear is S40 - S1170 the ratio is 1/2,052

4.gear is S63 - S1810 the ratio is 1/1,326

Problem is that now is spindle max speed 1600rpm. And when I put in mda S1800  the max speed is 1600rpm when i have spindle override on 60%. On 50% override i have abaot 1300rpm. If i put my override on 100% is the same like 60%

My MDA configuration is like that:

MD31050[0] = 10

MD31050[1] = 10

MD31050[2] = 10

MD31050[3] = 10

MD31050[4] = 10

MD31060[0] = 56

MD31060[1] = 56

MD31060[2] = 36

MD31060[3] = 20

MD31060[4] = 13

MD32250 = 120%

MD32260 = 2400rpm

Can somebody help me.

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Split from Configuring the gear spindle speeds for 840Dsl.

Hello,

MD32250 = Value of set point in % correspondence to max speed of motor. So in your case it should be 100%

To get precise RPM please load MD as below.

MD31050[0]  = 10000

MD31050[1]  = 10000

MD31050[2]  = 1000

MD31050[3]  =  1000

MD31050[4]  =  1000

MD31060[0]  =  55777

MD31060[1]  =  55777

MD31060[2]  =  3604

MD31060[3]  =  2052

MD31060[4]  =  1326

MD32260      =  2400

HTH

hello 

thank you for your reply.

if i setup parameter MD32260 =2400 is my maximal speed 1200rpm. 

Parameter md32250 must bi 100%?

and i have problem with my spindle ratio, if i put in mda S1200 M4 then if i have spindle override on 100% the spindl must rotating with 1200rpm but is not. On spindle override 60% is the rotating with 1200rpm?

where can be a problem?

There is my nc archive.

Hello,

Machine data you mentioned in first post & the spindle gear machine data in the attached NC archive file, are different. Please load the complete parameters as mentioned in my earlier post, run the spindle in top gear position at 100% & measure the spindle RPM. Let us know the result here so that problem can be sort out.

Hello,

sorry i atach a wrong NC archive,

This is correct NC arhive.

The maximal speed of spindle is 922rpm. 

Hello,

In attached data, data configuration is as below.

1. spindle has 2 encoders with 2500 PPR. 31020[0] = 2500 31020[1]=2500 

2. spindle encoder is direct. 31040[0]= 1

It is confusion. Please check how many encoders for spindle & their location.

Assuming spindle has 1 encoder i.e. motor encoder, set parameter 31040 = 0. Save & activate data. Run the machine & check spindle display RPM. 

Piscean2010 thank you for your help but I resolve problem.

I set up parameters like you said and i set up parameters SD43210 and SD43220 to correct value and now working correctly

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