Hello APW. We're sorry that your HD70 is not functioning properly. There are tried and true techniques we can help you with that will promote consistent scanning results. Quite often these issues have to do with the environment you’re operating on which may affect the tool’s accuracy. We would be happy to trouble shoot this with you, whatever the problem may be. We stand behind our products. Please contact us through the Zircon website and we’ll figure it out for you. Thank you.