產生計數錯誤可能有以下幾種可能。首先，編碼器的軸與驅動之間產生空轉而產生計數錯誤。這時將會產生不定期的大量計數錯誤。其次，由于噪波等的影響也會產生計數錯誤。這也是不定期的，但若只有少量的技數錯誤，可認為是受噪波的影響。

日本NEMICON內密控編碼器，OSS系列、OVW2系列、OEK系列以下為部分內密控產品型號，請參考：
SNK-SP1000-2MWT
SNK-SP2500-2MWT
OEK-20-2MHC
OEK-40-2MHC
OEK-50-2MHC
OEK-100-2MHC
OEK-200-2MHC
OEK-300-2MHC
OEK-360-2MHC
OEW2-036-2MHC
OEW2-06-2MHC
OEW2-06-2M
OEK-100-2MD
OEW2-2048-2MD
OEK-05-2BSB
OEW2-01-2MD
OEK-100-2MHC
OEK-50-2MHC
OSS-01-2HC
OSS-036-2HC
OSS-04-2
ASS-1024GC-24V-100-00
OVW2-2048-2MD
OEW2-01-2HC
OEW2-01-2
OEW-02-2
OEW2-02-2
OEW2-1024-2HT
OVW2-1024-2MHT
OSS-006-2HC
OEW2-003-2MHT
OEW2-06-2MHT
OEW-25-2
OME-100-2
MCA-105-015-00E
OME-100-2
NOC-S5000-2MHT
OEW2-25-2MD
MCA-205-015-00E
OSS-006-2HC
OVW2-18-2MHC
NE-2048-2MD
OME-500-2
MCA-105-015-00E、
OME-500-2
MCA-205-015-00E
NOC-S100-2MHC
0VW2-06-2MHT
HES-1024-2MHT-800
NE-1024-2MD
OVW2-25-2MD
SBH-0512-2T
SBH-0512-2MT
SBH-0512-2MD
NE-10-2MD
OEK-50-2M
SBH-1024-2T
SBH-1024-2MT
SBH-1024-2MD
NE-1024-2MD
OEK-200-2M
SBH-4096-2T 
SBH-4096-2MT
SBH-4096-2MD
NE-25-2MD
OEK-300-2M
SBH-8192-2T
SBH-8192-2MT
SBH-8192-2MD
NE-2048-2MD
OEK-100-2M
SBH-100-2TSBH-100-2MT
SBH-100-2MD
NE-50-2MD
OEK-250-2M
OPN-01-2M
OPN-01-2MC
OPN-01-2MHC 
OPN-01-2MD
OEK-360-2M
OPN-036-2M
OPN-036-2MC
OPN-036-2MHC
OPN-036-2MD
OPN-01-2MHCP
OPN-10-2M
OPN-10-2MC
OPN-10-2MHC
OVW2-003-2MC 
OVW2-003-2MD 
OVW2-003-2MHCP
OVW2-005-2MC 
OVW2-005-2MD 
OVW2-005-2MHCP
OVW2-006-2MC 
OVW2-006-2MD 
OVW2-006-2MHCP
OVW2-0125-2MC 
OVW2-0125-2MD 
OVW2-0125-2MHCP
OVW2-025-2MC 
OVW2-025-2MD 
OVW2-025-2MHCP
OVW2-0256-2MC 
OVW2-0256-2MD 
OVW2-0256-2MHCP