Question about Encoder Scale

30cm can be OK but it depends on the 5V draw of the encoders
Older encoders may have significant current consumption
(the oldest Heidenhain scales use incandescent lamps!)

I have a question it's in the same context.

I build a spindle driven by a HF chinesium Rattm motor. I gear it down to apprx. 1:2. I also have an encoder from IFM with 4096 ppr. I will attach it to the spindle by a belt. I'll try to make booth pulleys at the same diameter. But we dont live in a perfect world. So when i turn the motor twice, the spindle turns 1 times. The encoder turns 1,1 times because the pulley is a little larger in diameter as the spindle pulley. So what is the right scale i need to set on the encoder scale?

The motor and spindle difference i handle in the VFD controller. that is not difficult.

How i fix the 1.1:1 from the spindle and the attached encoder. The encoder have a+ b+ and z+ (index) so i need an exact revolution of the spindle at the encoder.

Is the formula:

Encoder Scale=PPR*revoution when spindle turns 1 ?
Encoder Scale=4096 * 1.1?
encoder Scale 4505.6?

Thanks in advance!

Best,
Udo

Hi PCW,

the Voltage between A /A B /A and GND is 300mV or 3.2V.
Between A and A/ or B and B/ is between -2.8 and 2.8V.
Is this correct?! Also, if A /A is 2.8V, b /b is also 2.8V. Didnt B /B need to be -2.8V?

Best regards
Marcel

No one any ideas?

MATZE-ATZE-SCH wrote: Hi PCW,

the Voltage between A /A B /A and GND is 300mV or 3.2V.
Between A and A/ or B and B/ is between -2.8 and 2.8V.
Is this correct?! Also, if A /A is 2.8V, b /b is also 2.8V. Didnt B /B need to be -2.8V?

Best regards
Marcel

Sorry, i thought PCW is more experienced with this so i did not reply.
That seems all good.

Hi tommylight,

ok, thank you.
Hmm, I think the next think I try is to reinstall LinuxCNC with a fresh new .hal and .ini . Don´t know what else I can do to try to solve the Problem?

Best regards
Marcel